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Sorry, missed this comment. Anyway, the Lemuria idea was never an accepted scientific theory (that I've seen), and therefore does not merit much discussion. I'm afraid that adding it might equate to adding
trivia to the article. – VisionHolder «
talk »05:42, 7 April 2010 (UTC)reply
I defer to your editorial decisions on what to include and what not to include, since you have some expert knowledge on the topic, and an "average reader" like me does not. However, a lot of people who don't know much about lemurs' paleontology and evolution have heard (or misheard) something along the lines of, "a while back, some scientists studying the ancestry of the lemurs deduced that there must have been a sunk continent..., etc." - for me, at least that was the only "fact[oid]" concerning the topic that I could remember before I first saw this article. While you know better than an average reader that the
Lemuria hypothesis never became "an accepted scientific theory", I think that its sufficiently notable to be worth mentioning, even if just to contrast modern level of evolutionary and geological knowledge to that of
Ernst Haeckel's and
Philip Sclater's generation. (And, by the way, thanks for your great lemur photos on Wiki Commons!)
Vmenkov (
talk)
10:10, 7 April 2010 (UTC)reply
Hi, I've signed up for this review. I'll boldly copyedit the easy stuff as I read through it, and bring the other stuff up here. Will probably take a few days to complete, because it's so nice outside!
Sasata (
talk)
21:29, 4 April 2010 (UTC)reply
Take your time. I really appreciate the review. Keep in mind that I will take this article to FA (as well as several others that have yet to be written) before I take
Lemur to FA. Therefore, I appreciate a very thorough review to facilitate a smooth FAC run. – VisionHolder «
talk »21:35, 4 April 2010 (UTC)reply
Looks great so far! Here my comments for the first section (lead will be done last)
Please clarify what a basal primate is in the second sentence. Then the next sentence mentions the confusion with ancestral primates: is this the same as a basal primate?
"The closest living relatives of primates are the extinct plesiadapiforms" so are they living or extinct?
maybe it should be mentioned that Darwinius maxillae is Adaptiformes
Might be worthwhile to include a pic of a toothcomb, as this feature is referred to frequently later on
"More recently comparative studies of the cytochrome b gene have shown that lemurs descended from lorisiform (loris-like) primates." I think this might fly over many people's heads; it would be worthwhile to invest a sentence or two to briefly explain why and how this gene is used to assess phylogenetic differences in closely related species
I'm not sure if I know the answer to this. I understand the implications more than the techniques themselves. If I'm lucky, maybe one of my sources will talk about it... – VisionHolder «
talk »22:44, 6 April 2010 (UTC)reply
Just a suggestion for FAC, as perhaps this point will come up again. If you look at refs 10-19 in Andriaholinirina et al., 2006, you will probably find something citable in there. Incidentally, looking at the reference list for that paper, it seems that J. Pastorini has done quite a bit of research with molecular phylogenetics/phylogeography of lemurs, but I don't see any of his work being cited in this article. If this were FAC, I'd bring that up :)
Sasata (
talk)
04:15, 11 April 2010 (UTC)reply
Roughly half of the references you mentioned from that paper were freely accessible, and each of those simply mentioned using the technique, but did not mention why. Again, all of the literature I've seen just assumes that people know why. As for J. Pastorini, I will probably be citing her more in the family and genus articles. There are two issues with her works: First, they are more dated than the more recent publications that either affirm or deny her findings. Since the newer studies tried to be more inclusive, either by using a large number of species or a large number of individuals, I would consider the more recent work to be more reliable. Second, some of her studies do not appear to be currently supported. For example, her paper of sifakas favored merging subspecies that are now considered to be distinct species today.
Since I will be taking this article straight to FAC following this review, please advise on how I should continue. Personally, I feel this explanation of cytochrome b analysis should be covered on the
cytochrome b article (which it is not), not in this article. – VisionHolder «
talk »23:17, 11 April 2010 (UTC)reply
I'll leave the editorial decisions up to you. Chances are likely no-one will even bring it up at FAC. If you're interested, there's more info
here and
here, for example.
Sasata (
talk)
15:06, 13 April 2010 (UTC)reply
"If adapids were the ancestors of both lemurs and lorises, the split would have predated the early Eocene, which would be supported by molecular phylogenetic studies,[11] which show that lemurs split from lorises approximately 62 to 65 Ma[14] (up from previous estimates of 47 and >54 Ma)." Suggest splitting this big sentence in two, which will remove a repetitive "which", and give the reader a mental pause to reflect on this piece of scientific evidence.
"Madagascar fossil sites are restricted to only five windows…" This should be instead the adjective form of Madagascar, correct? (perhaps better to reword to avoid having to use that potentially unfamiliar word)
"There is a huge temporal gap in the fossil record from the Late Cretaceous to the Late Pleistocene in Madagascar due to the presence marine rocks during these times at all known fossil sites." Perhaps the dates should be included? Also, I'm not getting why the presence of marine rocks at all fossil sites leads to a temporal gap in the fossil record.
Ironically, I just met Dr. E.L. Simons (a famous researcher in primate evolution) today and got to ask that question. From what he said, the island of Madagascar has slowly been tipping up (out of the ocean) along the west coast. These are the only Eocene or Miocene sediment layers known in Madagascar, and surveys have shown only marine fossils. Otherwise, the rest of the island seems to lack fossil beds. (If no sediment accumulates, fossils and fossil beds do not form. This is actually the norm for most regions of the planet, and partly explains why we will never know all the life forms that have existed on this planet.) Honestly, I'm not sure where to get references for all this basic stuff, if it's needed. Let me know how you want me to proceed. – VisionHolder «
talk »22:44, 6 April 2010 (UTC)reply
Somewhere, sometime, someone must have written a book or review article on paleogeography of Madagascar that could be used as a source. I do think the article should be expanded a bit to clarify this basic stuff (like you did above), it's useful background info that helps the reader understand the story.
Sasata (
talk)
04:15, 11 April 2010 (UTC)reply
"However, this is unlikely since the only seamounts (along the Davie Ridge) would have been too small in a such a wide channel." Why are they too small? Is there known to be a minimum size limit before seamounts can be colonized?
The Mozambique Channel is quite vast, and the odds of a rafting animal landing on something as tiny as one of these seamounts (when exposed) is very remote. It is much more likely that a rafting animal would have traveled the whole distance once rather than part-way to a pin-prick of an island, then again (at another time) to Madagascar. Having flown over the Mozambique Channel, maybe this feels much more obvious than it sounds... – VisionHolder «
talk »22:44, 6 April 2010 (UTC)reply
"Initially argued based on similarities in behavior and molar morphology," awkward construction
"Still, some anthropologists continue to support cheirogaleid/lorisiform relationship." missing word somewhere
"Monkeys evolved during the Oligocene (approximately 30 Ma), and it is commonly accepted that their intelligence, aggression, and deceptiveness gave them the advantage in exploiting the environment over the earlier lemur-like primates, ultimately driving them to extinction." clarify that this happened in places other than Madagascar
Both of those maps could be bigger
I've addressed many of these points, so please review. There are a few that I have not addressed, but I've run out of time and will either address them or discuss them here when I get back. – VisionHolder «
talk »14:05, 6 April 2010 (UTC)reply
section "Distribution and diversity":
It would be useful to mention how far away from Madagascar the Comoro Islands are
About 500 km from Island to closest Malagasy coastline according to Google maps, but I guess that's original research :)
Sasata (
talk)
"Molecular studies on E. f. fulvus (from the mainland) and E. f. mayottensis (from the Comoro Islands) have supported this assumption by showing no genetic differences between the two populations." Does f. mean form, as in Eulemer fulvus forma fulvus? I don't think you should assume the readers will know that. How do the populations differ, BTW?
How does a smaller relative brain size help the lemur respond to limited, seasonal resources?
A brain is an energy-expensive organ, so a smaller brain reduces energy needs. I tried to find a way to add this in, but failed. Every attempt I made both broke up the continuity of the list and created a need for a citation that I don't have. My source for the list (as it stands now) doesn't go into detail because it assumes the reader understands that brains are energy-hogs. – VisionHolder «
talk »17:37, 10 April 2010 (UTC)reply
If it's that common-knowledge it might be in a basic biology/mammalogy text; still think this would be good to find a cite for (for FAC, at least).
Sasata (
talk)
04:15, 11 April 2010 (UTC)reply
"Secondarily, extreme resource limitations and seasonal breeding are thought to have resulted in three other relatively common lemur traits: female dominance, sexual monomorphism, and male-male competition for mates involving low levels of agonism, such as sperm competition." This interesting sentence leaves me with more questions. (i) Would really like to hear more how female dominance is a natural outcome of a resource-restricted environment. (will you be blue-linking that female dominance article ;-) ) (ii) Maybe I don't get out enough, but I don't know what sexual monomorphism is. (iii) Also unclear about the concept of low-level agonism.
I don't plan to write a female dominance page because I can only approach it from the perspective of lemur research. I will address it in more detail on an upcoming "Lemur behavior" article, though. Anyway, I've changed the link to just point to
Dominance hierarchy since that appears to be the commonly accepted place to point that topic to now. I hope monomorphism and agonism are more clear now. If not, let me know. – VisionHolder «
talk »17:37, 10 April 2010 (UTC)reply
"…has taken a significant toll, not only on lemur populations, but also on their diversity." Perhaps this might be better to clarify like "…not only on the size of lemur populations"?
I'm thinking that links to
family and
genera should be included in this section, but the terms have been used in previous sections (and not linked there), so I'll let you decide
"Since the first taxonomic classification of lemurs in 1758 by Carl Linnaeus," would be cool to find an online link for this
"Up until Richard Owen published a definitive anatomical study in 1866," any chance of a cite to this publication?
"bizarre morphological traits" bizarre doesn't seem encyclopedic to me; "unusual" is better, but is there another way to word this to let the traits speak for themselves?
I removed "bizarre" all-together. I'm not sure what you have in mind for rewording. I think when the traits are listed, they already speak for themselves. – VisionHolder «
talk »18:39, 10 April 2010 (UTC)reply
"In 2008, Russell Mittermeier, Colin Groves, and others reversed this taxonomic ruling by grouping the family Daubentoniidae within the infraorder Lemuriformes." What was their justification for doing so?
According to personal communication with Groves, it was mostly due to popular opinion. (It doesn't affect phylogeny. Since it's basal, Groves wanted it in its own infraorder, while others preferred to see it listed under Lemuriformes.) The source itself is very ambiguous and does not explain. – VisionHolder «
talk »18:39, 10 April 2010 (UTC)reply
why not show a cladogram based on Orlando et al. as well? I'd like to be able to visually compare between the two current competing phylogenies
Because, honestly, the authors of the Orlando paper are in the process of publishing papers that conform more to the Horvath phylogeny. Last I heard, it's not out yet, but I didn't want to introduce a cladogram that was quickly going to become dated. Or, at least, that's how I remember the reasoning. – VisionHolder «
talk »18:39, 10 April 2010 (UTC)reply
"However, ruffed lemurs were reassigned to the genus Varecia in 1962," source?
"… the brown lemurs were moved to the genus Eulemur in 1988." source?
"In 1997, Prolemur had been considered a synonym for Hapalemur." "had been" implies that it once was, but is no more… is that true?
"When described in 1839, the Fork-marked lemurs were initially placed in the genus Lemur with the Ring-tailed Lemur." cite
"the Giant Mouse Lemur was moved to its own genus, Mirza, in 1985" cite
"The Hairy-eared Dwarf Lemur was first placed in the genus Cheirogaleus (dwarf lemurs) in 1875" cite
"However, this approach could backfire if used excessively, ultimately hurting conservation efforts." Need a source for this
I'm working on this one. I've emailed a few people who would be mostly like to know where this opinion has been published. I can tell you, though, that it is a noteworthy opinion. – VisionHolder «
talk »18:39, 10 April 2010 (UTC)reply
most of the of suggested citations requests aren't necessary for GAN, because the secondary source already given covers the sourcing, but I think they're a nice touch (especially if you can find an online source) and it will make the article even more useful for future readers
I'll try to address both sections tomorrow when I have more time. However, some of the citation requests for this section should not be issues. For example, the citation for the Hairy-eared Dwarf Lemur statement is at the end of its 2-sentence paragraph. And most of the others I quickly glanced at were in the same boat. – VisionHolder «
talk »14:47, 8 April 2010 (UTC)reply
Okay... so with the citation requests, you want the original source? Why isn't the secondary source sufficient? I guess I'm confused about that. Otherwise, I've done my best to address your concerns and I'm open for comments, suggestions, and more feedback. – VisionHolder «
talk »18:39, 10 April 2010 (UTC)reply
The secondary source is sufficient, feel free to ignore my suggestion. I personally like to see citations to the original papers, under the assumption that it makes the article somewhat more academically rigorous, and it will help future students in their research. For example, if I want to verify or have more details about why the Giant Mouse Lemur was moved to its own genus, Mirza, I have to first hunt down the citation in the secondary source before I know what the primary source is. YMMV
Sasata (
talk)
04:15, 11 April 2010 (UTC)reply
I don't mind changing the sources as you suggest. I understand and respect your reasoning. However, I prefer not to for the same reason I do not cite the original work for the "Binomial name" section in the taxobox. Just because a paper describes a new species, promotes it to species status, or removes its species status, that does not mean the new taxonomic status is final. Other authors will publish their opinions within the coming years either in favor or against. For that reason, I prefer to cite a highly reputable secondary source that confirms the findings and references the original work. I think I discussed this with Ucucha during the Babakotia GAC or FAC. Alternatively, I could cite both. – VisionHolder «
talk »12:14, 12 April 2010 (UTC)reply
Please be clear, I am not asking you to change any sources. The inclusion of primary sources would be in addition to the secondary sources that are already cited, and would be included as a convenience to the reader. For example, in the current
Porbeagle FAC, I asked the nominator to include a link to the protologue, because it was readily available, and it links the 18th century taxonomy with the current Wikipedia article. One of the things this article does is describe the evolution of lemur, but it could also help show the evolution of our understanding by following the development of ideas and theories in the literature, and giving the reader easier access to the primary studies. Ok, that's all I'll say about that. I'll wrap up the GAR later today; it clearly meets the GA requirements, and my other suggestions are mostly food for thought.
Sasata (
talk)
13:44, 12 April 2010 (UTC)reply
How on earth do you know it was a raft, esp of vegetation, when it's 56 million years ago? Maybe logs, maybe a land bridge... —
Rlevse •
Talk • 00:49, 7 April 2010 (UTC)reply
This is the popular theory that dominates the academic literature. The idea goes back to the late 19th century and is based on sightings reported from sailors. All we know is that oceanic dispersal does happen, but it's a random event. Given enough time (i.e. millions of years), unlikely events like these become possible. A log is another possibility, but is less stable in the open ocean since it can roll. The land bridge idea has largely been ruled out due to low representation of mammalian orders on the island. In other words, since very few mammal groups appear to have colonized at different times across approximately 20–30 million years, then why didn't other types of mammals just walk over during that long stretch of time. There's also the issue that deep ocean separates Madagascar for Africa and that the other continents had already separated by that point, so even low sea levels wouldn't have allowed for a land bridge. Hope this helps... – VisionHolder «
talk »05:39, 7 April 2010 (UTC)reply
Hmm. Okay. Thanks. Maybe it should be changed to "most likely by a vegetation raft", but I'll leave that to you to decide. —
Rlevse •
Talk • 10:02, 7 April 2010 (UTC)reply
Land bridges are considered less likely in cases like this because they leave more geological traces than rafts do. I think rafts (floating mats of vegetation, generally) would be more likely than logs because they are more likely to sustain small mammals for a considerable time (months) than rafts are.
Ucucha12:06, 7 April 2010 (UTC)reply
The land bridge idea has now been mentioned in the article. Thanks for bringing this topic to my attention. I somehow missed it when I tried to summarize everything. – VisionHolder «
talk »01:42, 14 April 2010 (UTC)reply
You are right—I made a mistake in my recent edit. However, this issue is trickier than it appears. It involves some emails that have gone back and forth between
Colin Groves and me. Once you send me a copy of the article I requested, I'll try to clarify the statement. In short, an extinction likely occurred, but we just don't know because no one's done the necessary research to find out. – VisionHolder «
talk »01:57, 14 April 2010 (UTC)reply
Honestly, this is getting into a realm of genetics that is getting a little above my head. I see where my source references the paper you linked to, but I don't see how to address it in this article. And honestly, I was planning to address my source in more detail someday when I re-write the
Mouse lemur article. If you understand it enough explain it in this article, you're entitled to make the changes. – VisionHolder «
talk »03:37, 20 April 2010 (UTC)reply
This was discussed at the FAC in some depth. I don't see why the current title would be ungrammatical, and the other titles are not directly comparable because they cover different subjects.
Ucucha15:32, 11 May 2010 (UTC)reply
It appears there is some disput over the new name of this article. I have agree with
Ucucha that "Evolutionary history of the lemur" makes less sense than "Evolutionary history of lemurs". Either way, the title of the article should match the wording of the lead sentence. – VisionHolder «
talk »21:42, 18 February 2011 (UTC)reply
That's another possibility. However, there seems to be a lack of consistency in the naming of related articles, so it's not just a matter of correcting this article. Instead, it's an issue standardizing many. – VisionHolder «
talk »05:37, 22 February 2011 (UTC)reply
Article to be split
Due to the article's size and dual topics (evolutionary history & taxonomy), I will be splitting off the taxonomy section into its own article,
Taxonomic history of lemurs, following the TFA honor. If anyone has any comments or concerns, please voice them here. If the TFA managers feel this is reason enough to delay the the appearance of the article on the main page, I am fine with that. – VisionHolder «
talk »18:58, 20 February 2011 (UTC)reply
Pedantics on et al.
There are two forms of et al. used in the article/references: et al. and et al. I've read that the former is correct per e.g., etc., n.b., and i.e.: it is well-known. However, some style guidelines still require it to be italicised. I'll leave it up to others to decide whether that is the case. Cheers,
Jack (
talk)
21:39, 20 February 2011 (UTC)reply
The article itself uses the italicized version consistently. The differences are in the references. Unfortunately, the references use the standard citations templates and {{Sfn}}, therefore it's an issue with the templates. – VisionHolder «
talk »00:09, 21 February 2011 (UTC)reply
Make up your minds! Is this the History of the lemur or the Evolution of the lemur? It isn't the Evolutionary history of the lemur unless what you are documenting is "how the history of the lemur evolved" (which would be about how people over time wrote the lemur's history) or "how the evolution of the lemur was studied by historians". Which is it?
Amandajm (
talk)
10:22, 25 February 2011 (UTC)reply
The evolutionary history of lemurs occurred in isolation from other primates, on the island of Madagascar, for at least 40 million years.
This is the first sentence of the article, and it is just plain wrong! It was the evolution of lemurs that occurred in isolation from other primates, not the "history" of the species, evolutionary or otherwise. "History" is a subject. It is a field of study.
I have just looked at several wiki articles that use this form "evolutionary history". In each case there appears to be within the article a good deal of descriptive and explanatory material that is not "history" as such. This prompts me to suggest that the writers of such articles consider looking at all who use this term and revising it.
They use it. But in what sense, precisely, do they use it? Correctly? Or is it simply one of those terms which has "caught on" regardless of whether it is correct or not? The inappropriate use of redundancies! Put two similar words together and they will breed....
Amandajm (
talk)
02:53, 28 February 2011 (UTC)reply
Most likely, people speak about the "evolutionary history" of the group to distinguish it from the simple "evolution" of the group (which occurred when the group evolved from its ancestors) and from other kinds of "history"—like the history of human interactions with the group.
Ucucha03:39, 28 February 2011 (UTC)reply
I think this is a greatly written article, but the format of the citations/references seems unnecessarily complex, with inline citations referring to abbreviations referring to full citations. Is this is a common format? Why not just skip the abbreviations and link the sources directly?
Animalparty (
talk)
08:22, 16 October 2013 (UTC)reply
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Sorry, missed this comment. Anyway, the Lemuria idea was never an accepted scientific theory (that I've seen), and therefore does not merit much discussion. I'm afraid that adding it might equate to adding
trivia to the article. – VisionHolder «
talk »05:42, 7 April 2010 (UTC)reply
I defer to your editorial decisions on what to include and what not to include, since you have some expert knowledge on the topic, and an "average reader" like me does not. However, a lot of people who don't know much about lemurs' paleontology and evolution have heard (or misheard) something along the lines of, "a while back, some scientists studying the ancestry of the lemurs deduced that there must have been a sunk continent..., etc." - for me, at least that was the only "fact[oid]" concerning the topic that I could remember before I first saw this article. While you know better than an average reader that the
Lemuria hypothesis never became "an accepted scientific theory", I think that its sufficiently notable to be worth mentioning, even if just to contrast modern level of evolutionary and geological knowledge to that of
Ernst Haeckel's and
Philip Sclater's generation. (And, by the way, thanks for your great lemur photos on Wiki Commons!)
Vmenkov (
talk)
10:10, 7 April 2010 (UTC)reply
Hi, I've signed up for this review. I'll boldly copyedit the easy stuff as I read through it, and bring the other stuff up here. Will probably take a few days to complete, because it's so nice outside!
Sasata (
talk)
21:29, 4 April 2010 (UTC)reply
Take your time. I really appreciate the review. Keep in mind that I will take this article to FA (as well as several others that have yet to be written) before I take
Lemur to FA. Therefore, I appreciate a very thorough review to facilitate a smooth FAC run. – VisionHolder «
talk »21:35, 4 April 2010 (UTC)reply
Looks great so far! Here my comments for the first section (lead will be done last)
Please clarify what a basal primate is in the second sentence. Then the next sentence mentions the confusion with ancestral primates: is this the same as a basal primate?
"The closest living relatives of primates are the extinct plesiadapiforms" so are they living or extinct?
maybe it should be mentioned that Darwinius maxillae is Adaptiformes
Might be worthwhile to include a pic of a toothcomb, as this feature is referred to frequently later on
"More recently comparative studies of the cytochrome b gene have shown that lemurs descended from lorisiform (loris-like) primates." I think this might fly over many people's heads; it would be worthwhile to invest a sentence or two to briefly explain why and how this gene is used to assess phylogenetic differences in closely related species
I'm not sure if I know the answer to this. I understand the implications more than the techniques themselves. If I'm lucky, maybe one of my sources will talk about it... – VisionHolder «
talk »22:44, 6 April 2010 (UTC)reply
Just a suggestion for FAC, as perhaps this point will come up again. If you look at refs 10-19 in Andriaholinirina et al., 2006, you will probably find something citable in there. Incidentally, looking at the reference list for that paper, it seems that J. Pastorini has done quite a bit of research with molecular phylogenetics/phylogeography of lemurs, but I don't see any of his work being cited in this article. If this were FAC, I'd bring that up :)
Sasata (
talk)
04:15, 11 April 2010 (UTC)reply
Roughly half of the references you mentioned from that paper were freely accessible, and each of those simply mentioned using the technique, but did not mention why. Again, all of the literature I've seen just assumes that people know why. As for J. Pastorini, I will probably be citing her more in the family and genus articles. There are two issues with her works: First, they are more dated than the more recent publications that either affirm or deny her findings. Since the newer studies tried to be more inclusive, either by using a large number of species or a large number of individuals, I would consider the more recent work to be more reliable. Second, some of her studies do not appear to be currently supported. For example, her paper of sifakas favored merging subspecies that are now considered to be distinct species today.
Since I will be taking this article straight to FAC following this review, please advise on how I should continue. Personally, I feel this explanation of cytochrome b analysis should be covered on the
cytochrome b article (which it is not), not in this article. – VisionHolder «
talk »23:17, 11 April 2010 (UTC)reply
I'll leave the editorial decisions up to you. Chances are likely no-one will even bring it up at FAC. If you're interested, there's more info
here and
here, for example.
Sasata (
talk)
15:06, 13 April 2010 (UTC)reply
"If adapids were the ancestors of both lemurs and lorises, the split would have predated the early Eocene, which would be supported by molecular phylogenetic studies,[11] which show that lemurs split from lorises approximately 62 to 65 Ma[14] (up from previous estimates of 47 and >54 Ma)." Suggest splitting this big sentence in two, which will remove a repetitive "which", and give the reader a mental pause to reflect on this piece of scientific evidence.
"Madagascar fossil sites are restricted to only five windows…" This should be instead the adjective form of Madagascar, correct? (perhaps better to reword to avoid having to use that potentially unfamiliar word)
"There is a huge temporal gap in the fossil record from the Late Cretaceous to the Late Pleistocene in Madagascar due to the presence marine rocks during these times at all known fossil sites." Perhaps the dates should be included? Also, I'm not getting why the presence of marine rocks at all fossil sites leads to a temporal gap in the fossil record.
Ironically, I just met Dr. E.L. Simons (a famous researcher in primate evolution) today and got to ask that question. From what he said, the island of Madagascar has slowly been tipping up (out of the ocean) along the west coast. These are the only Eocene or Miocene sediment layers known in Madagascar, and surveys have shown only marine fossils. Otherwise, the rest of the island seems to lack fossil beds. (If no sediment accumulates, fossils and fossil beds do not form. This is actually the norm for most regions of the planet, and partly explains why we will never know all the life forms that have existed on this planet.) Honestly, I'm not sure where to get references for all this basic stuff, if it's needed. Let me know how you want me to proceed. – VisionHolder «
talk »22:44, 6 April 2010 (UTC)reply
Somewhere, sometime, someone must have written a book or review article on paleogeography of Madagascar that could be used as a source. I do think the article should be expanded a bit to clarify this basic stuff (like you did above), it's useful background info that helps the reader understand the story.
Sasata (
talk)
04:15, 11 April 2010 (UTC)reply
"However, this is unlikely since the only seamounts (along the Davie Ridge) would have been too small in a such a wide channel." Why are they too small? Is there known to be a minimum size limit before seamounts can be colonized?
The Mozambique Channel is quite vast, and the odds of a rafting animal landing on something as tiny as one of these seamounts (when exposed) is very remote. It is much more likely that a rafting animal would have traveled the whole distance once rather than part-way to a pin-prick of an island, then again (at another time) to Madagascar. Having flown over the Mozambique Channel, maybe this feels much more obvious than it sounds... – VisionHolder «
talk »22:44, 6 April 2010 (UTC)reply
"Initially argued based on similarities in behavior and molar morphology," awkward construction
"Still, some anthropologists continue to support cheirogaleid/lorisiform relationship." missing word somewhere
"Monkeys evolved during the Oligocene (approximately 30 Ma), and it is commonly accepted that their intelligence, aggression, and deceptiveness gave them the advantage in exploiting the environment over the earlier lemur-like primates, ultimately driving them to extinction." clarify that this happened in places other than Madagascar
Both of those maps could be bigger
I've addressed many of these points, so please review. There are a few that I have not addressed, but I've run out of time and will either address them or discuss them here when I get back. – VisionHolder «
talk »14:05, 6 April 2010 (UTC)reply
section "Distribution and diversity":
It would be useful to mention how far away from Madagascar the Comoro Islands are
About 500 km from Island to closest Malagasy coastline according to Google maps, but I guess that's original research :)
Sasata (
talk)
"Molecular studies on E. f. fulvus (from the mainland) and E. f. mayottensis (from the Comoro Islands) have supported this assumption by showing no genetic differences between the two populations." Does f. mean form, as in Eulemer fulvus forma fulvus? I don't think you should assume the readers will know that. How do the populations differ, BTW?
How does a smaller relative brain size help the lemur respond to limited, seasonal resources?
A brain is an energy-expensive organ, so a smaller brain reduces energy needs. I tried to find a way to add this in, but failed. Every attempt I made both broke up the continuity of the list and created a need for a citation that I don't have. My source for the list (as it stands now) doesn't go into detail because it assumes the reader understands that brains are energy-hogs. – VisionHolder «
talk »17:37, 10 April 2010 (UTC)reply
If it's that common-knowledge it might be in a basic biology/mammalogy text; still think this would be good to find a cite for (for FAC, at least).
Sasata (
talk)
04:15, 11 April 2010 (UTC)reply
"Secondarily, extreme resource limitations and seasonal breeding are thought to have resulted in three other relatively common lemur traits: female dominance, sexual monomorphism, and male-male competition for mates involving low levels of agonism, such as sperm competition." This interesting sentence leaves me with more questions. (i) Would really like to hear more how female dominance is a natural outcome of a resource-restricted environment. (will you be blue-linking that female dominance article ;-) ) (ii) Maybe I don't get out enough, but I don't know what sexual monomorphism is. (iii) Also unclear about the concept of low-level agonism.
I don't plan to write a female dominance page because I can only approach it from the perspective of lemur research. I will address it in more detail on an upcoming "Lemur behavior" article, though. Anyway, I've changed the link to just point to
Dominance hierarchy since that appears to be the commonly accepted place to point that topic to now. I hope monomorphism and agonism are more clear now. If not, let me know. – VisionHolder «
talk »17:37, 10 April 2010 (UTC)reply
"…has taken a significant toll, not only on lemur populations, but also on their diversity." Perhaps this might be better to clarify like "…not only on the size of lemur populations"?
I'm thinking that links to
family and
genera should be included in this section, but the terms have been used in previous sections (and not linked there), so I'll let you decide
"Since the first taxonomic classification of lemurs in 1758 by Carl Linnaeus," would be cool to find an online link for this
"Up until Richard Owen published a definitive anatomical study in 1866," any chance of a cite to this publication?
"bizarre morphological traits" bizarre doesn't seem encyclopedic to me; "unusual" is better, but is there another way to word this to let the traits speak for themselves?
I removed "bizarre" all-together. I'm not sure what you have in mind for rewording. I think when the traits are listed, they already speak for themselves. – VisionHolder «
talk »18:39, 10 April 2010 (UTC)reply
"In 2008, Russell Mittermeier, Colin Groves, and others reversed this taxonomic ruling by grouping the family Daubentoniidae within the infraorder Lemuriformes." What was their justification for doing so?
According to personal communication with Groves, it was mostly due to popular opinion. (It doesn't affect phylogeny. Since it's basal, Groves wanted it in its own infraorder, while others preferred to see it listed under Lemuriformes.) The source itself is very ambiguous and does not explain. – VisionHolder «
talk »18:39, 10 April 2010 (UTC)reply
why not show a cladogram based on Orlando et al. as well? I'd like to be able to visually compare between the two current competing phylogenies
Because, honestly, the authors of the Orlando paper are in the process of publishing papers that conform more to the Horvath phylogeny. Last I heard, it's not out yet, but I didn't want to introduce a cladogram that was quickly going to become dated. Or, at least, that's how I remember the reasoning. – VisionHolder «
talk »18:39, 10 April 2010 (UTC)reply
"However, ruffed lemurs were reassigned to the genus Varecia in 1962," source?
"… the brown lemurs were moved to the genus Eulemur in 1988." source?
"In 1997, Prolemur had been considered a synonym for Hapalemur." "had been" implies that it once was, but is no more… is that true?
"When described in 1839, the Fork-marked lemurs were initially placed in the genus Lemur with the Ring-tailed Lemur." cite
"the Giant Mouse Lemur was moved to its own genus, Mirza, in 1985" cite
"The Hairy-eared Dwarf Lemur was first placed in the genus Cheirogaleus (dwarf lemurs) in 1875" cite
"However, this approach could backfire if used excessively, ultimately hurting conservation efforts." Need a source for this
I'm working on this one. I've emailed a few people who would be mostly like to know where this opinion has been published. I can tell you, though, that it is a noteworthy opinion. – VisionHolder «
talk »18:39, 10 April 2010 (UTC)reply
most of the of suggested citations requests aren't necessary for GAN, because the secondary source already given covers the sourcing, but I think they're a nice touch (especially if you can find an online source) and it will make the article even more useful for future readers
I'll try to address both sections tomorrow when I have more time. However, some of the citation requests for this section should not be issues. For example, the citation for the Hairy-eared Dwarf Lemur statement is at the end of its 2-sentence paragraph. And most of the others I quickly glanced at were in the same boat. – VisionHolder «
talk »14:47, 8 April 2010 (UTC)reply
Okay... so with the citation requests, you want the original source? Why isn't the secondary source sufficient? I guess I'm confused about that. Otherwise, I've done my best to address your concerns and I'm open for comments, suggestions, and more feedback. – VisionHolder «
talk »18:39, 10 April 2010 (UTC)reply
The secondary source is sufficient, feel free to ignore my suggestion. I personally like to see citations to the original papers, under the assumption that it makes the article somewhat more academically rigorous, and it will help future students in their research. For example, if I want to verify or have more details about why the Giant Mouse Lemur was moved to its own genus, Mirza, I have to first hunt down the citation in the secondary source before I know what the primary source is. YMMV
Sasata (
talk)
04:15, 11 April 2010 (UTC)reply
I don't mind changing the sources as you suggest. I understand and respect your reasoning. However, I prefer not to for the same reason I do not cite the original work for the "Binomial name" section in the taxobox. Just because a paper describes a new species, promotes it to species status, or removes its species status, that does not mean the new taxonomic status is final. Other authors will publish their opinions within the coming years either in favor or against. For that reason, I prefer to cite a highly reputable secondary source that confirms the findings and references the original work. I think I discussed this with Ucucha during the Babakotia GAC or FAC. Alternatively, I could cite both. – VisionHolder «
talk »12:14, 12 April 2010 (UTC)reply
Please be clear, I am not asking you to change any sources. The inclusion of primary sources would be in addition to the secondary sources that are already cited, and would be included as a convenience to the reader. For example, in the current
Porbeagle FAC, I asked the nominator to include a link to the protologue, because it was readily available, and it links the 18th century taxonomy with the current Wikipedia article. One of the things this article does is describe the evolution of lemur, but it could also help show the evolution of our understanding by following the development of ideas and theories in the literature, and giving the reader easier access to the primary studies. Ok, that's all I'll say about that. I'll wrap up the GAR later today; it clearly meets the GA requirements, and my other suggestions are mostly food for thought.
Sasata (
talk)
13:44, 12 April 2010 (UTC)reply
How on earth do you know it was a raft, esp of vegetation, when it's 56 million years ago? Maybe logs, maybe a land bridge... —
Rlevse •
Talk • 00:49, 7 April 2010 (UTC)reply
This is the popular theory that dominates the academic literature. The idea goes back to the late 19th century and is based on sightings reported from sailors. All we know is that oceanic dispersal does happen, but it's a random event. Given enough time (i.e. millions of years), unlikely events like these become possible. A log is another possibility, but is less stable in the open ocean since it can roll. The land bridge idea has largely been ruled out due to low representation of mammalian orders on the island. In other words, since very few mammal groups appear to have colonized at different times across approximately 20–30 million years, then why didn't other types of mammals just walk over during that long stretch of time. There's also the issue that deep ocean separates Madagascar for Africa and that the other continents had already separated by that point, so even low sea levels wouldn't have allowed for a land bridge. Hope this helps... – VisionHolder «
talk »05:39, 7 April 2010 (UTC)reply
Hmm. Okay. Thanks. Maybe it should be changed to "most likely by a vegetation raft", but I'll leave that to you to decide. —
Rlevse •
Talk • 10:02, 7 April 2010 (UTC)reply
Land bridges are considered less likely in cases like this because they leave more geological traces than rafts do. I think rafts (floating mats of vegetation, generally) would be more likely than logs because they are more likely to sustain small mammals for a considerable time (months) than rafts are.
Ucucha12:06, 7 April 2010 (UTC)reply
The land bridge idea has now been mentioned in the article. Thanks for bringing this topic to my attention. I somehow missed it when I tried to summarize everything. – VisionHolder «
talk »01:42, 14 April 2010 (UTC)reply
You are right—I made a mistake in my recent edit. However, this issue is trickier than it appears. It involves some emails that have gone back and forth between
Colin Groves and me. Once you send me a copy of the article I requested, I'll try to clarify the statement. In short, an extinction likely occurred, but we just don't know because no one's done the necessary research to find out. – VisionHolder «
talk »01:57, 14 April 2010 (UTC)reply
Honestly, this is getting into a realm of genetics that is getting a little above my head. I see where my source references the paper you linked to, but I don't see how to address it in this article. And honestly, I was planning to address my source in more detail someday when I re-write the
Mouse lemur article. If you understand it enough explain it in this article, you're entitled to make the changes. – VisionHolder «
talk »03:37, 20 April 2010 (UTC)reply
This was discussed at the FAC in some depth. I don't see why the current title would be ungrammatical, and the other titles are not directly comparable because they cover different subjects.
Ucucha15:32, 11 May 2010 (UTC)reply
It appears there is some disput over the new name of this article. I have agree with
Ucucha that "Evolutionary history of the lemur" makes less sense than "Evolutionary history of lemurs". Either way, the title of the article should match the wording of the lead sentence. – VisionHolder «
talk »21:42, 18 February 2011 (UTC)reply
That's another possibility. However, there seems to be a lack of consistency in the naming of related articles, so it's not just a matter of correcting this article. Instead, it's an issue standardizing many. – VisionHolder «
talk »05:37, 22 February 2011 (UTC)reply
Article to be split
Due to the article's size and dual topics (evolutionary history & taxonomy), I will be splitting off the taxonomy section into its own article,
Taxonomic history of lemurs, following the TFA honor. If anyone has any comments or concerns, please voice them here. If the TFA managers feel this is reason enough to delay the the appearance of the article on the main page, I am fine with that. – VisionHolder «
talk »18:58, 20 February 2011 (UTC)reply
Pedantics on et al.
There are two forms of et al. used in the article/references: et al. and et al. I've read that the former is correct per e.g., etc., n.b., and i.e.: it is well-known. However, some style guidelines still require it to be italicised. I'll leave it up to others to decide whether that is the case. Cheers,
Jack (
talk)
21:39, 20 February 2011 (UTC)reply
The article itself uses the italicized version consistently. The differences are in the references. Unfortunately, the references use the standard citations templates and {{Sfn}}, therefore it's an issue with the templates. – VisionHolder «
talk »00:09, 21 February 2011 (UTC)reply
Make up your minds! Is this the History of the lemur or the Evolution of the lemur? It isn't the Evolutionary history of the lemur unless what you are documenting is "how the history of the lemur evolved" (which would be about how people over time wrote the lemur's history) or "how the evolution of the lemur was studied by historians". Which is it?
Amandajm (
talk)
10:22, 25 February 2011 (UTC)reply
The evolutionary history of lemurs occurred in isolation from other primates, on the island of Madagascar, for at least 40 million years.
This is the first sentence of the article, and it is just plain wrong! It was the evolution of lemurs that occurred in isolation from other primates, not the "history" of the species, evolutionary or otherwise. "History" is a subject. It is a field of study.
I have just looked at several wiki articles that use this form "evolutionary history". In each case there appears to be within the article a good deal of descriptive and explanatory material that is not "history" as such. This prompts me to suggest that the writers of such articles consider looking at all who use this term and revising it.
They use it. But in what sense, precisely, do they use it? Correctly? Or is it simply one of those terms which has "caught on" regardless of whether it is correct or not? The inappropriate use of redundancies! Put two similar words together and they will breed....
Amandajm (
talk)
02:53, 28 February 2011 (UTC)reply
Most likely, people speak about the "evolutionary history" of the group to distinguish it from the simple "evolution" of the group (which occurred when the group evolved from its ancestors) and from other kinds of "history"—like the history of human interactions with the group.
Ucucha03:39, 28 February 2011 (UTC)reply
I think this is a greatly written article, but the format of the citations/references seems unnecessarily complex, with inline citations referring to abbreviations referring to full citations. Is this is a common format? Why not just skip the abbreviations and link the sources directly?
Animalparty (
talk)
08:22, 16 October 2013 (UTC)reply
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