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Archive 1 |
I'm trying to translate this article into Thai. Now, I get stuck at Barton's Long-beaked Echidna, couldn't find any clear references myself. So I need some help! :-P
What is it? If this is 'one more' surviving species of echidnas, why don't you put the name and information in Echidna and Platypus as well? There, it's said quite clear that 'there are only 4 extant species of monotremes, and 3 of them are echidnas'.
What's the deal with "Australia-New Guinea and Tasmania" since Tasmania is part of Australia, shouldn't this be changed to "mainland Australia, New Guinea and Tasmania"? The problem here is the presence of monotremes on other islands off mainland Austrlia. Maybe it would be better just to say "Australia" and leave off the southern state. Also, is that hyphen supposed to be a comma? It could also be confusing if people think it means momotremes are found only in the parts of Australia called New Guinea and Tasmania. Problem with that is that New Guinea ceased to belong to Australia in the 1970s (plus monotremes are everywhere over here). Thoughts? Felix Dance 13:20, 27 December 2005 (UTC)
Look, I'm just gonna take the law into my own hands here. If you have a problem with my definition of Australia-New Guinea and Tasmania then argue it here. Felix Dance 07:55, 3 January 2006 (UTC)
I would like to ask if anyone could foward more information relating to the monotreme eggs, in what way are they different to reptile and other eggs, an image of an egg, and any other relevant information. Thanks. -- Francisco Valverde 15:36, 23 January 2007 (UTC)
If so, which one is used? Is the prototheria subclass obsolete? --
Philo
17:33, 15 December 2006 (UTC)
Never heard of it. Surely this is a misspelling of Prototheria, which is already referred to in the lead? Gnostrat ( talk) 03:37, 9 January 2008 (UTC)
This article mentions that Monotremes lactate, but do not have defined nipples. Would it be possible to clarify this to explain where exactly the milk exits the mother? — Preceding unsigned comment added by Anaxial ( talk • contribs) 22:01, 18 March 2008 (UTC)
Could anyone of the main contributors update the paragraph that starts and ends with "Living monotremes lack teeth as adults. [...] The imminent sequencing of the platypus genome should shed light on this and many other questions regarding the evolutionary history of the monotremes.[9]", under the Physiology section?
Some of its information is probably outdated or can be confirmed, given that presently (May, 2008) the platypus genome has just been sequenced. Other parts of the article could also be restated for the same or analogous reasons. I've made minor changes to some articles, but I wouldn't like to disrupt other's work to such extent, considering that English is not my mother tongue and I believe that it is better for a previous contributor or those more involved with an article to decide how to update the information he/she/others have already provided. Thanks. -- Pmronchi ( talk) 13:54, 11 May 2008 (UTC)
If there is a reference for the claim that recent monotremes are facultative poikilotherms as an adaptation to extereme weather then please provide it. On the face of it, the claim is highly speculative. Why animals that reside in cold mountain streams (platypus) and warm tropical lowlands (echidna) should have a recent commonly derived form of facultative exothermy rather than simply being retaining it as a primitive state is hard to fathom. As it is, this counterintuitive claim is unreferenced, and as unreferenced it is subject to flagging. —Preceding unsigned comment added by Kjaer ( talk • contribs) 11:31, 14 October 2008 (UTC)
Did the monotremes represent a splitting-off from the other mammal lines before other mammals developed placental systems and separate openings? (i.e. were all proto-mammals like monotremes at the time the split happened?) Or are monotremes thought to represent a throwback to an earlier arrangement, that occurred after proto-mammals had already begun to acquire these features?
I think it would be useful for the article to give current thinking on this. Jheald ( talk) 10:47, 6 April 2009 (UTC)
And, should 'Platypi' in Fossil monotremes be corrected? Thank you. --- Nil 17:03, 28 August 2005 (UTC)
What's the convention for capitalization of platypus? Nixie on the Talk:Fauna of Australia page says it should be capitalized (as is done on the Fauna of Australia page proper), and I did that for a couple at first on this page (since some were, and some weren't), but then noticed the majority of instances on this page are actually lowercase initial. Decisions? FireWorks 01:41, 27 December 2005 (UTC)
The article says the Echidna does enter REM sleep, albeit only when the ambient temperature of its environment is around 25 °C (77 °F). At temperatures between 15 °C (59 °F) and 28 °C (82 °F), REMS is suppressed
So at 25°C REM sleep is both active and suppressed?! -- Malvineous ( talk) 11:14, 26 June 2010 (UTC)
Ivakhnenko, Mikhail F. (2009). "Eotherapsid hypothesis for the origin of Monotremata". Paleontological Journal. 43 (3): 237–250. Aleksey ( Alnagov ( talk) 09:21, 23 June 2009 (UTC))
There is this really cool thing happening in Wikipedia, called automatic taxoboxes. It is described in Template:Automatic_taxobox. It allows us to modify the taxoboxes of species, genera, families, etc, in a way that reduces duplication of information, making it easy to have uniform, maintainable placement of a taxon in the tree of life. Would it be OK by all of the monotreme editors if I started modifying the taxoboxes of the various monotremes so that they have an "automatic taxobox" (for taxa higher than species) or a "speciesbox" (for species), rather than a "taxobox"? Ben morphett ( talk) 13:54, 30 July 2011 (UTC)
All temperatures seem to be in Celsius, but are not marked as such. is this simply the convention across bio articles, or should it be noted?
But it should be noted as "x degrees C" it doesn't take so much effort and space, and it makes the article more clear — Preceding unsigned comment added by Yskwiki ( talk • contribs) 23:54, 6 December 2011 (UTC)
I want to know the form of their nitrogenous waste? it is uric acid (like bird and other animal who laid egg) or urea ... (because they lay egg, but the young embryo stay only 10 days in.... ) ??!?! thank you ...
Yes I have to find this out for an AP biology project for H school. This will be a usefull peice of info. — Preceding unsigned comment added by Yskwiki ( talk • contribs) 23:56, 6 December 2011 (UTC)
Are Monotremes actually surviving Synapsids and not Mammals? They have various features that make them seem more related to Synapsids than they are to Mammals, such as: they have poisonous spurs, they have bills, they have scaly skin underneath their fur coats, females have no nipples to feed their young with their milk, and they lay eggs. This is confusing... The Winged Yoshi —Preceding unsigned comment added by The Winged Yoshi ( talk • contribs) 00:27, 2 November 2007 (UTC)
The Monotreme article does not seem to address the structure of the monotreme heart. 24.90.182.208 ( talk) 07:04, 7 December 2012 (UTC)
I would think that the monotreme evoluted before the evolution of placental mammals yet this group is stated as evoluting in the Early Cretaceous while the eutheria are stated as evolving in the Late Jurassic. Does anyone know what the story is here?
I have deleted the final words to the sentence "The young of a monotreme is sometimes called a puggle,
[1]
[2]
[3] although this is not technically correct.
The cited links were:
http://australianet.com/tlf/faq.shtml#echidnas
http://www.thelostforests.com.au/Puggle/All-about-Puggle-and-more/History-of-the-Puggle.asp
The term puggles has common acceptance as the young of monotremes, as our other citations show. The lost forest character may share the name, but does not own it. The citations are not reliable sources to dispute this.
WotherspoonSmith (
talk)
10:30, 28 September 2013 (UTC)
References
Vandalism: This article is loaded with vandalism. I don't know where to begin. Bus stop ( talk) 15:13, 3 January 2016 (UTC)
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Cheers.— cyberbot II Talk to my owner:Online 22:18, 6 July 2016 (UTC)
A mammal is an animal that does NOT lay eggs. If an animal lays eggs, it is NOT a mammal! For f*cks sake! There can't be a mammal that lays eggs, or else it wouldn't be a mammal!
-- 82.34.173.149 ( talk) 11:43, 1 November 2009 (UTC)
The current article reads, "Monotremes were very poorly understood for many years, and to this day some of the 19th century myths that grew up around them endure. It is still sometimes thought, for example, that modern monotremes are the survivors of an early branching of the mammal tree; a later branching is thought to have led to the marsupial and placental groups."
Huh? Monotremes lay eggs, showing a transitional character to reptiles. Marsupials and placentals do not lay eggs. The tree of life web project places monotremes in an early branch, as opposed to marsupials and placentals. My question is: how do marsupials not represent an early branch of the mammal tree? I will delete or edit this example if my question is not started to be resolved in a matter of days. ApostateAbe 08:40, 3 March 2007 (UTC)
I took a look in the history and saw that an earlier text told of the myth like so:
This is indeed a myth, and obviously different from the current telling of the "myth" that would be true, not false. I'll just delete the whole paragraph mentioning the "myth." ApostateAbe 09:16, 3 March 2007 (UTC)
References and external links are opposite of each other. They need to either say "References" or "External links". -- 71.104.190.42 19:23, 22 April 2006 (UTC)
In the article it is said the species are simply warm-blooded but on the page on mesothermia it is offered as an example of that. Can someone clarify? Leendert123 ( talk) 07:47, 2 February 2017 (UTC)
Right now, the first words in this article are "Monotremes are basal mammals..." This is awful.
Confusing laypeople with the word "basal", which (even if accurate) is totally non-essential to the overall concept of "monotremes", is just giving in to the fascistic cladists. The cladists, even when they're right, are still crazy, just like all obsessed purists.
Why not start with "Monotremes are brown or tawny colored mammals..." That would be stupid too, do you see? Their place on the cladist ladder is no more germane to the overall concept than their color is.
The article should start something like this: "Monotremes are one of the three main groups of mammals, along with placentals and marsupials. The monotremes are typified by..." or something like that.
If Wikipedia gives in to all the cladist craziness, next thing you know there won't be an article about fish, because of course there's no such thing as fish, right? Sheesh. — Preceding unsigned comment added by 72.93.48.234 ( talk) 20:37, 14 June 2017 (UTC)
Just a note on spelling: Z. bruijnii appears to be correct. Of several sources that agree, I am taking Long, Archer, Flannery & Hand, Prehistoric mammals of Australia and New Guinea (University of NSW Press, 2002, ISBN 0868404357) as authoritive. Trevor will know who there people are already, I guess. Tannin — Preceding unsigned comment added by PrimeBOT ( talk • contribs) 23:49, 7 July 2017 (UTC)
what are the main differences between all 3 classes of mammals? Ankit jaiswal7549 ( talk) 12:54, 15 March 2018 (UTC)
"The time when the monotreme line diverged from other mammalian lines is uncertain, but one survey of genetic studies gives an estimate of about 220 million years ago.[42] Fossils of a jaw fragment 110 million years old were found at Lightning Ridge, New South Wales. These fragments, from the species Steropodon galmani, are the oldest known fossils of monotremes. Fossils from the genera Teinolophos, and Obdurodon have also been discovered."
According to the "Fossil Species" section of this article, Teinolophos trusleri is the oldest known monotreme, not Steropodon.
If the intent of the passage is to compare the earliest evidence of the emergence of monotremes suggested by genetic studies with that suggested by the fossil record, shouldn't the passage be revised to focus on Teinolophos?
Suggested revision:
"The time when the monotreme line diverged from other mammalian lines is uncertain, but one survey of genetic studies gives an estimate of about 220 million years ago.[42] The oldest known monotreme fossils (tooth-bearing jaw fragments belonging to Teinolophos) are 121–112.5 million years old."
Source: The oldest platypus and its bearing on divergence timing of the platypus and echidna clades -- 128.111.108.106 ( talk) 08:08, 14 May 2018 (UTC)
Is it possible for more information to be provided on the fossil species? Were they predators or herbivores? what did they look like? did they resemble any modern day mammals? What was their anatomy, was it similar to modern eggs? — Preceding unsigned comment added by 77.230.150.118 ( talk) 19:27, 29 February 2016 (UTC)
Unfortunately, most of the fossil forms are known only from tooth and jaw fragments, so it's hard to say. Jaw fragments of Teinolophos exhibit a canal that, in living monotremes, accommodates a large nerve and blood vessel that connect to the electrosensory "bill" organ. As the bill organ is used by echidnas and the platypus to locate invertebrates in leaf litter and aquatic mud respectively, it's inferred that at least Teinolophos was a platypus-like invertebrate-eater. Obdurodon dicksoni is known from a nearly complete skull that's very similar to that of the modern platypus, so it too probably just looked very similar to a modern platypus.
As for their reproductive anatomy: I can't find anything on monotreme egg fossils, and I wouldn't expect to any time soon. Living monotremes' eggs are soft and leathery - soft parts of animals usually rot or are scavenged before they can be preserved. Egg laying is thought to be an ancestral characteristic that the common acestor of all monotremes retained from the common ancestor of all mammals. Marsupials and placentals lost their ability to lay eggs. The oldest platypus and its bearing on divergence timing of the platypus and echidna clades.-- 128.111.108.106 ( talk) 08:56, 14 May 2018 (UTC)
Is there a spur in both legs? If not, in what leg is it?
Yes, the spur is on both legs.
Both legs, mystery poster. It's a modification of the calcaneus (the big bone in your heel). --
128.111.108.106 (
talk)
09:05, 14 May 2018 (UTC)
Since when have there been 5 species? — Preceding unsigned comment added by Mitternacht90 ( talk • contribs) 22:15, 22 May 2006 (UTC)
I am wondering. Do the male monotreme carry a penis? Does it have internal testicles? How does copulation take place - Like in birds? How is the uterus of the female monotreme? Some marsupials tend to have two uteri instead of one - right? — Preceding unsigned comment added by 217.74.211.90 ( talk) 07:35, 6 September 2006 (UTC)
Reference 20 on the page. The citation to the Wayback Machine is correct, however the "archived from the original" note is no longer relevant and this link should be removed. The website is no longer related to this topic and the page had been removed. This website is now about health/bodybuilding supplements.
Link should be removed and only the link to the internet archive remain (advised by Wiki Editor to leave note suggesting removal rather than removing myself).
KarlTippins ( talk) 09:20, 12 May 2019 (UTC)
monotremes are hybrids of a ancient reptile and a ancient mammal that is why they lay eggs — Preceding unsigned comment added by 71.181.116.212 ( talk) 10:19, 20 December 2020 (UTC)
Please do not modify it.
The result of the request for the Proposed Merger of {requested article} into this talk page's article was:
I propose to merge Platypoda into Monotremata. Platypoda seems to be a disused suborder that has been merged into the order Monotremata. YorkshireExpat YorkshireExpat ( talk) 17:10, 18 March 2021 (UTC)
YorkshireExpat Ok so after doing some research I do think it can be appropriate to move the page. It's more of a footnote in the classification of Monotremata. So I do think it can be fine for merging, your correct. Des Vallee ( talk) 01:07, 25 May 2021 (UTC) It is non the less a very good article that is well written and well researched, and well formatted article so merging may add valuable information into Monotrema. Des Vallee ( talk) 09:20, 3 June 2021 (UTC)
Please do not modify it.
Subsequent comments should be made in a new section on this talk page. No further edits should be made to this section.
A copy of this template can be found here.
This article was the subject of a Wiki Education Foundation-supported course assignment, between 1 October 2018 and 12 December 2018. Further details are available
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Above undated message substituted from Template:Dashboard.wikiedu.org assignment by PrimeBOT ( talk) 04:25, 17 January 2022 (UTC)
![]() | This is an archive of past discussions. Do not edit the contents of this page. If you wish to start a new discussion or revive an old one, please do so on the current talk page. |
Archive 1 |
I'm trying to translate this article into Thai. Now, I get stuck at Barton's Long-beaked Echidna, couldn't find any clear references myself. So I need some help! :-P
What is it? If this is 'one more' surviving species of echidnas, why don't you put the name and information in Echidna and Platypus as well? There, it's said quite clear that 'there are only 4 extant species of monotremes, and 3 of them are echidnas'.
What's the deal with "Australia-New Guinea and Tasmania" since Tasmania is part of Australia, shouldn't this be changed to "mainland Australia, New Guinea and Tasmania"? The problem here is the presence of monotremes on other islands off mainland Austrlia. Maybe it would be better just to say "Australia" and leave off the southern state. Also, is that hyphen supposed to be a comma? It could also be confusing if people think it means momotremes are found only in the parts of Australia called New Guinea and Tasmania. Problem with that is that New Guinea ceased to belong to Australia in the 1970s (plus monotremes are everywhere over here). Thoughts? Felix Dance 13:20, 27 December 2005 (UTC)
Look, I'm just gonna take the law into my own hands here. If you have a problem with my definition of Australia-New Guinea and Tasmania then argue it here. Felix Dance 07:55, 3 January 2006 (UTC)
I would like to ask if anyone could foward more information relating to the monotreme eggs, in what way are they different to reptile and other eggs, an image of an egg, and any other relevant information. Thanks. -- Francisco Valverde 15:36, 23 January 2007 (UTC)
If so, which one is used? Is the prototheria subclass obsolete? --
Philo
17:33, 15 December 2006 (UTC)
Never heard of it. Surely this is a misspelling of Prototheria, which is already referred to in the lead? Gnostrat ( talk) 03:37, 9 January 2008 (UTC)
This article mentions that Monotremes lactate, but do not have defined nipples. Would it be possible to clarify this to explain where exactly the milk exits the mother? — Preceding unsigned comment added by Anaxial ( talk • contribs) 22:01, 18 March 2008 (UTC)
Could anyone of the main contributors update the paragraph that starts and ends with "Living monotremes lack teeth as adults. [...] The imminent sequencing of the platypus genome should shed light on this and many other questions regarding the evolutionary history of the monotremes.[9]", under the Physiology section?
Some of its information is probably outdated or can be confirmed, given that presently (May, 2008) the platypus genome has just been sequenced. Other parts of the article could also be restated for the same or analogous reasons. I've made minor changes to some articles, but I wouldn't like to disrupt other's work to such extent, considering that English is not my mother tongue and I believe that it is better for a previous contributor or those more involved with an article to decide how to update the information he/she/others have already provided. Thanks. -- Pmronchi ( talk) 13:54, 11 May 2008 (UTC)
If there is a reference for the claim that recent monotremes are facultative poikilotherms as an adaptation to extereme weather then please provide it. On the face of it, the claim is highly speculative. Why animals that reside in cold mountain streams (platypus) and warm tropical lowlands (echidna) should have a recent commonly derived form of facultative exothermy rather than simply being retaining it as a primitive state is hard to fathom. As it is, this counterintuitive claim is unreferenced, and as unreferenced it is subject to flagging. —Preceding unsigned comment added by Kjaer ( talk • contribs) 11:31, 14 October 2008 (UTC)
Did the monotremes represent a splitting-off from the other mammal lines before other mammals developed placental systems and separate openings? (i.e. were all proto-mammals like monotremes at the time the split happened?) Or are monotremes thought to represent a throwback to an earlier arrangement, that occurred after proto-mammals had already begun to acquire these features?
I think it would be useful for the article to give current thinking on this. Jheald ( talk) 10:47, 6 April 2009 (UTC)
And, should 'Platypi' in Fossil monotremes be corrected? Thank you. --- Nil 17:03, 28 August 2005 (UTC)
What's the convention for capitalization of platypus? Nixie on the Talk:Fauna of Australia page says it should be capitalized (as is done on the Fauna of Australia page proper), and I did that for a couple at first on this page (since some were, and some weren't), but then noticed the majority of instances on this page are actually lowercase initial. Decisions? FireWorks 01:41, 27 December 2005 (UTC)
The article says the Echidna does enter REM sleep, albeit only when the ambient temperature of its environment is around 25 °C (77 °F). At temperatures between 15 °C (59 °F) and 28 °C (82 °F), REMS is suppressed
So at 25°C REM sleep is both active and suppressed?! -- Malvineous ( talk) 11:14, 26 June 2010 (UTC)
Ivakhnenko, Mikhail F. (2009). "Eotherapsid hypothesis for the origin of Monotremata". Paleontological Journal. 43 (3): 237–250. Aleksey ( Alnagov ( talk) 09:21, 23 June 2009 (UTC))
There is this really cool thing happening in Wikipedia, called automatic taxoboxes. It is described in Template:Automatic_taxobox. It allows us to modify the taxoboxes of species, genera, families, etc, in a way that reduces duplication of information, making it easy to have uniform, maintainable placement of a taxon in the tree of life. Would it be OK by all of the monotreme editors if I started modifying the taxoboxes of the various monotremes so that they have an "automatic taxobox" (for taxa higher than species) or a "speciesbox" (for species), rather than a "taxobox"? Ben morphett ( talk) 13:54, 30 July 2011 (UTC)
All temperatures seem to be in Celsius, but are not marked as such. is this simply the convention across bio articles, or should it be noted?
But it should be noted as "x degrees C" it doesn't take so much effort and space, and it makes the article more clear — Preceding unsigned comment added by Yskwiki ( talk • contribs) 23:54, 6 December 2011 (UTC)
I want to know the form of their nitrogenous waste? it is uric acid (like bird and other animal who laid egg) or urea ... (because they lay egg, but the young embryo stay only 10 days in.... ) ??!?! thank you ...
Yes I have to find this out for an AP biology project for H school. This will be a usefull peice of info. — Preceding unsigned comment added by Yskwiki ( talk • contribs) 23:56, 6 December 2011 (UTC)
Are Monotremes actually surviving Synapsids and not Mammals? They have various features that make them seem more related to Synapsids than they are to Mammals, such as: they have poisonous spurs, they have bills, they have scaly skin underneath their fur coats, females have no nipples to feed their young with their milk, and they lay eggs. This is confusing... The Winged Yoshi —Preceding unsigned comment added by The Winged Yoshi ( talk • contribs) 00:27, 2 November 2007 (UTC)
The Monotreme article does not seem to address the structure of the monotreme heart. 24.90.182.208 ( talk) 07:04, 7 December 2012 (UTC)
I would think that the monotreme evoluted before the evolution of placental mammals yet this group is stated as evoluting in the Early Cretaceous while the eutheria are stated as evolving in the Late Jurassic. Does anyone know what the story is here?
I have deleted the final words to the sentence "The young of a monotreme is sometimes called a puggle,
[1]
[2]
[3] although this is not technically correct.
The cited links were:
http://australianet.com/tlf/faq.shtml#echidnas
http://www.thelostforests.com.au/Puggle/All-about-Puggle-and-more/History-of-the-Puggle.asp
The term puggles has common acceptance as the young of monotremes, as our other citations show. The lost forest character may share the name, but does not own it. The citations are not reliable sources to dispute this.
WotherspoonSmith (
talk)
10:30, 28 September 2013 (UTC)
References
Vandalism: This article is loaded with vandalism. I don't know where to begin. Bus stop ( talk) 15:13, 3 January 2016 (UTC)
Hello fellow Wikipedians,
I have just modified one external link on Monotreme. Please take a moment to review my edit. If you have any questions, or need the bot to ignore the links, or the page altogether, please visit this simple FaQ for additional information. I made the following changes:
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Cheers.— cyberbot II Talk to my owner:Online 22:18, 6 July 2016 (UTC)
A mammal is an animal that does NOT lay eggs. If an animal lays eggs, it is NOT a mammal! For f*cks sake! There can't be a mammal that lays eggs, or else it wouldn't be a mammal!
-- 82.34.173.149 ( talk) 11:43, 1 November 2009 (UTC)
The current article reads, "Monotremes were very poorly understood for many years, and to this day some of the 19th century myths that grew up around them endure. It is still sometimes thought, for example, that modern monotremes are the survivors of an early branching of the mammal tree; a later branching is thought to have led to the marsupial and placental groups."
Huh? Monotremes lay eggs, showing a transitional character to reptiles. Marsupials and placentals do not lay eggs. The tree of life web project places monotremes in an early branch, as opposed to marsupials and placentals. My question is: how do marsupials not represent an early branch of the mammal tree? I will delete or edit this example if my question is not started to be resolved in a matter of days. ApostateAbe 08:40, 3 March 2007 (UTC)
I took a look in the history and saw that an earlier text told of the myth like so:
This is indeed a myth, and obviously different from the current telling of the "myth" that would be true, not false. I'll just delete the whole paragraph mentioning the "myth." ApostateAbe 09:16, 3 March 2007 (UTC)
References and external links are opposite of each other. They need to either say "References" or "External links". -- 71.104.190.42 19:23, 22 April 2006 (UTC)
In the article it is said the species are simply warm-blooded but on the page on mesothermia it is offered as an example of that. Can someone clarify? Leendert123 ( talk) 07:47, 2 February 2017 (UTC)
Right now, the first words in this article are "Monotremes are basal mammals..." This is awful.
Confusing laypeople with the word "basal", which (even if accurate) is totally non-essential to the overall concept of "monotremes", is just giving in to the fascistic cladists. The cladists, even when they're right, are still crazy, just like all obsessed purists.
Why not start with "Monotremes are brown or tawny colored mammals..." That would be stupid too, do you see? Their place on the cladist ladder is no more germane to the overall concept than their color is.
The article should start something like this: "Monotremes are one of the three main groups of mammals, along with placentals and marsupials. The monotremes are typified by..." or something like that.
If Wikipedia gives in to all the cladist craziness, next thing you know there won't be an article about fish, because of course there's no such thing as fish, right? Sheesh. — Preceding unsigned comment added by 72.93.48.234 ( talk) 20:37, 14 June 2017 (UTC)
Just a note on spelling: Z. bruijnii appears to be correct. Of several sources that agree, I am taking Long, Archer, Flannery & Hand, Prehistoric mammals of Australia and New Guinea (University of NSW Press, 2002, ISBN 0868404357) as authoritive. Trevor will know who there people are already, I guess. Tannin — Preceding unsigned comment added by PrimeBOT ( talk • contribs) 23:49, 7 July 2017 (UTC)
what are the main differences between all 3 classes of mammals? Ankit jaiswal7549 ( talk) 12:54, 15 March 2018 (UTC)
"The time when the monotreme line diverged from other mammalian lines is uncertain, but one survey of genetic studies gives an estimate of about 220 million years ago.[42] Fossils of a jaw fragment 110 million years old were found at Lightning Ridge, New South Wales. These fragments, from the species Steropodon galmani, are the oldest known fossils of monotremes. Fossils from the genera Teinolophos, and Obdurodon have also been discovered."
According to the "Fossil Species" section of this article, Teinolophos trusleri is the oldest known monotreme, not Steropodon.
If the intent of the passage is to compare the earliest evidence of the emergence of monotremes suggested by genetic studies with that suggested by the fossil record, shouldn't the passage be revised to focus on Teinolophos?
Suggested revision:
"The time when the monotreme line diverged from other mammalian lines is uncertain, but one survey of genetic studies gives an estimate of about 220 million years ago.[42] The oldest known monotreme fossils (tooth-bearing jaw fragments belonging to Teinolophos) are 121–112.5 million years old."
Source: The oldest platypus and its bearing on divergence timing of the platypus and echidna clades -- 128.111.108.106 ( talk) 08:08, 14 May 2018 (UTC)
Is it possible for more information to be provided on the fossil species? Were they predators or herbivores? what did they look like? did they resemble any modern day mammals? What was their anatomy, was it similar to modern eggs? — Preceding unsigned comment added by 77.230.150.118 ( talk) 19:27, 29 February 2016 (UTC)
Unfortunately, most of the fossil forms are known only from tooth and jaw fragments, so it's hard to say. Jaw fragments of Teinolophos exhibit a canal that, in living monotremes, accommodates a large nerve and blood vessel that connect to the electrosensory "bill" organ. As the bill organ is used by echidnas and the platypus to locate invertebrates in leaf litter and aquatic mud respectively, it's inferred that at least Teinolophos was a platypus-like invertebrate-eater. Obdurodon dicksoni is known from a nearly complete skull that's very similar to that of the modern platypus, so it too probably just looked very similar to a modern platypus.
As for their reproductive anatomy: I can't find anything on monotreme egg fossils, and I wouldn't expect to any time soon. Living monotremes' eggs are soft and leathery - soft parts of animals usually rot or are scavenged before they can be preserved. Egg laying is thought to be an ancestral characteristic that the common acestor of all monotremes retained from the common ancestor of all mammals. Marsupials and placentals lost their ability to lay eggs. The oldest platypus and its bearing on divergence timing of the platypus and echidna clades.-- 128.111.108.106 ( talk) 08:56, 14 May 2018 (UTC)
Is there a spur in both legs? If not, in what leg is it?
Yes, the spur is on both legs.
Both legs, mystery poster. It's a modification of the calcaneus (the big bone in your heel). --
128.111.108.106 (
talk)
09:05, 14 May 2018 (UTC)
Since when have there been 5 species? — Preceding unsigned comment added by Mitternacht90 ( talk • contribs) 22:15, 22 May 2006 (UTC)
I am wondering. Do the male monotreme carry a penis? Does it have internal testicles? How does copulation take place - Like in birds? How is the uterus of the female monotreme? Some marsupials tend to have two uteri instead of one - right? — Preceding unsigned comment added by 217.74.211.90 ( talk) 07:35, 6 September 2006 (UTC)
Reference 20 on the page. The citation to the Wayback Machine is correct, however the "archived from the original" note is no longer relevant and this link should be removed. The website is no longer related to this topic and the page had been removed. This website is now about health/bodybuilding supplements.
Link should be removed and only the link to the internet archive remain (advised by Wiki Editor to leave note suggesting removal rather than removing myself).
KarlTippins ( talk) 09:20, 12 May 2019 (UTC)
monotremes are hybrids of a ancient reptile and a ancient mammal that is why they lay eggs — Preceding unsigned comment added by 71.181.116.212 ( talk) 10:19, 20 December 2020 (UTC)
Please do not modify it.
The result of the request for the Proposed Merger of {requested article} into this talk page's article was:
I propose to merge Platypoda into Monotremata. Platypoda seems to be a disused suborder that has been merged into the order Monotremata. YorkshireExpat YorkshireExpat ( talk) 17:10, 18 March 2021 (UTC)
YorkshireExpat Ok so after doing some research I do think it can be appropriate to move the page. It's more of a footnote in the classification of Monotremata. So I do think it can be fine for merging, your correct. Des Vallee ( talk) 01:07, 25 May 2021 (UTC) It is non the less a very good article that is well written and well researched, and well formatted article so merging may add valuable information into Monotrema. Des Vallee ( talk) 09:20, 3 June 2021 (UTC)
Please do not modify it.
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Above undated message substituted from Template:Dashboard.wikiedu.org assignment by PrimeBOT ( talk) 04:25, 17 January 2022 (UTC)