It seems to me that these critters have endostyles that eventually give rise to the mammalian thyroid gland. Shouldn't this be mentioned somewhere in the lead article?
Do lancelets have eyes? If no, when did they start evolving in chordates (probably in platyhelminthes I guess)? PhoenixSeraph 22:13, 1 April 2006 (UTC)
hey, people help me translate description for image. - PioM22:55, 14 Jun 2005 (UTC)
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In Asia, they are harvested commercially. -- what for? Food? If so, what sort of food? -- Spudtater 00:31, 21 February 2006 (UTC)
"Today, amphioxus may be extremely common in shallow sandy environments: at Discovery Bay, Jamaica, up to five thousand individuals per square meter of sand have been reported. In some parts of the world, amphioxus are eaten by humans or by domestic animals; they are important food items in some parts of Asia, where they are commercially harvested."
Look at this :
"In common with the vertebrates, lancelets have a nerve cord running along the back, pharyngeal gill slits and a tail that runs past the anus. Also like humans, the muscles are arranged in blocks called myomeres. Unlike the invertebrates, however, ..."
Why "humans" ? Only humans and lancelets do have myomeres, really ? What about other vertebrates between them ?
The major "textbook view" of Chordate subphylum relationships places the lancelets as a sister-group to the vertebrates. This is the picture presented in cladograms by both Brusca & Brusca (Invertebrates, Sinauer Associates 2003) and Miller & Harley (Zoology, McGraw-Hill 2007), as well as the Three of life project. This wikipedia article, however, appears very biased in expressing the other view, which is placing Urochordates as a basal group.
Stating neutrality as a goal, wikipedia articles should try not to take stands in ongoing debates. I have seen the "newer research suggests that" argument used in advocacy of both of the vertebrate sistergroup views; it is thus not very convincing unless one also states what kind of evidence there is for either view.-- Gunnar Mikalsen Kvifte ( talk) 06:58, 20 December 2007 (UTC)
The accepted view today is that urochordates are closer to vertebrates and lancelets farer away. This is supported by papers in the most prestigious journals. See Blair and Hedges 2005, Delsuc et al 2006, Vienne and Pontarotti 2006 and Bourlat et al 2006 -- Maximilianh ( talk) 22:34, 9 May 2009 (UTC)
I agree with the last user (Maximilianh): The issue has been settled, as evidenced by a string of high-profile studies relying on modern methods of phylogenetics. See also the wikipedia article on Chordates and references [46][47][48][49]. The statement that lancelets are the closest living invertebrate relatives of vertebrates is wrong and should be corrected. In particular the figure caption presents the old and superseded view as a fact: "The lancelet is a small, translucent, fish-like animal that is the closest living invertebrate relative of the vertebrates.[33][34]" — Preceding unsigned comment added by 134.76.223.13 ( talk) 15:35, 8 December 2018 (UTC)
You can use this ( ) excellent image for your article ^___^. Also you can translate the article about amphioxus from Russian Wikipedia -- LameClock ( talk) 11:18, 4 June 2008 (UTC)
How big it is? Could some one provide the detailed average dimensions (metric units please) of an adult lancelet? —Preceding
unsigned comment added by
128.163.42.93 (
talk) 22:31, 9 January 2009 (UTC)
The anatomical drawing of the lancet labels the finger-like projections near the mouth as ″13. mimosa″ Is that correct? I can't find that usage of mimosa anywhere else on Wikipedia or the web (though it may just be difficult to find on the web due to other more common uses). — Preceding
unsigned comment added by
129.55.200.20 (
talk) 15:27, 28 May 2013 (UTC)
What symmetry are juveniles missing? Anatomic symmetry, meaning they're not bilaterally symmetric as the adults are? Kanenas ( talk) 20:43, 26 July 2008 (UTC)
I did a search on Google Scholar for each of the species listed here, filtering for hits since the year 2000. The number to the left of each item indicate how many hits it got. As a measure of scientific and taxonomic validity, this is obviously WP:OR. On the other hand, it is a replicable measure of notability ( WP:NOTABLE).
17 Asymmetron inferum 78 Asymmetron lucayanum 1 Epigonichthys australis 0 Epigonichthys bassanus 0 Epigonichthys cingalensis 7 Epigonichthys cultellus 5 Epigonichthys hectori 29 Epigonichthys maldivensis 0 Branchiostoma africae 0 Branchiostoma arabiae 0 Branchiostoma bazarutense 2420 Branchiostoma belcheri 2 Branchiostoma bennetti 1 Branchiostoma bermudae 38 Branchiostoma californiense 0 Branchiostoma capense 68 Branchiostoma caribaeum 0 Branchiostoma clonaseum 20 Branchiostoma elongatum 3510 Branchiostoma floridae 0 Branchiostoma gambiense 7 Branchiostoma indicum 207 Branchiostoma japonicum 1350 Branchiostoma lanceolatum 0 Branchiostoma leonense 1 Branchiostoma longirostrum 10 Branchiostoma malayanum 0 Branchiostoma moretonense 39 Branchiostoma nigeriense 43 Branchiostoma platae 16 Branchiostoma senegalense 0 Branchiostoma tattersalli 33 Branchiostoma virginiae
Zyxwv99 ( talk) 02:19, 15 December 2015 (UTC)
Lancelets produce
GFP. I added an updated diagram based off of recent literature (2017).
(
Single Eukaryote |
talk | 22:16, 13 January 2021 (UTC))
It seems to me that these critters have endostyles that eventually give rise to the mammalian thyroid gland. Shouldn't this be mentioned somewhere in the lead article?
Do lancelets have eyes? If no, when did they start evolving in chordates (probably in platyhelminthes I guess)? PhoenixSeraph 22:13, 1 April 2006 (UTC)
hey, people help me translate description for image. - PioM22:55, 14 Jun 2005 (UTC)
This
level-5 vital article is rated Start-class on Wikipedia's
content assessment scale. It is of interest to the following WikiProjects: | |||||||||||||||||||||||||||||||||||
|
In Asia, they are harvested commercially. -- what for? Food? If so, what sort of food? -- Spudtater 00:31, 21 February 2006 (UTC)
"Today, amphioxus may be extremely common in shallow sandy environments: at Discovery Bay, Jamaica, up to five thousand individuals per square meter of sand have been reported. In some parts of the world, amphioxus are eaten by humans or by domestic animals; they are important food items in some parts of Asia, where they are commercially harvested."
Look at this :
"In common with the vertebrates, lancelets have a nerve cord running along the back, pharyngeal gill slits and a tail that runs past the anus. Also like humans, the muscles are arranged in blocks called myomeres. Unlike the invertebrates, however, ..."
Why "humans" ? Only humans and lancelets do have myomeres, really ? What about other vertebrates between them ?
The major "textbook view" of Chordate subphylum relationships places the lancelets as a sister-group to the vertebrates. This is the picture presented in cladograms by both Brusca & Brusca (Invertebrates, Sinauer Associates 2003) and Miller & Harley (Zoology, McGraw-Hill 2007), as well as the Three of life project. This wikipedia article, however, appears very biased in expressing the other view, which is placing Urochordates as a basal group.
Stating neutrality as a goal, wikipedia articles should try not to take stands in ongoing debates. I have seen the "newer research suggests that" argument used in advocacy of both of the vertebrate sistergroup views; it is thus not very convincing unless one also states what kind of evidence there is for either view.-- Gunnar Mikalsen Kvifte ( talk) 06:58, 20 December 2007 (UTC)
The accepted view today is that urochordates are closer to vertebrates and lancelets farer away. This is supported by papers in the most prestigious journals. See Blair and Hedges 2005, Delsuc et al 2006, Vienne and Pontarotti 2006 and Bourlat et al 2006 -- Maximilianh ( talk) 22:34, 9 May 2009 (UTC)
I agree with the last user (Maximilianh): The issue has been settled, as evidenced by a string of high-profile studies relying on modern methods of phylogenetics. See also the wikipedia article on Chordates and references [46][47][48][49]. The statement that lancelets are the closest living invertebrate relatives of vertebrates is wrong and should be corrected. In particular the figure caption presents the old and superseded view as a fact: "The lancelet is a small, translucent, fish-like animal that is the closest living invertebrate relative of the vertebrates.[33][34]" — Preceding unsigned comment added by 134.76.223.13 ( talk) 15:35, 8 December 2018 (UTC)
You can use this ( ) excellent image for your article ^___^. Also you can translate the article about amphioxus from Russian Wikipedia -- LameClock ( talk) 11:18, 4 June 2008 (UTC)
How big it is? Could some one provide the detailed average dimensions (metric units please) of an adult lancelet? —Preceding
unsigned comment added by
128.163.42.93 (
talk) 22:31, 9 January 2009 (UTC)
The anatomical drawing of the lancet labels the finger-like projections near the mouth as ″13. mimosa″ Is that correct? I can't find that usage of mimosa anywhere else on Wikipedia or the web (though it may just be difficult to find on the web due to other more common uses). — Preceding
unsigned comment added by
129.55.200.20 (
talk) 15:27, 28 May 2013 (UTC)
What symmetry are juveniles missing? Anatomic symmetry, meaning they're not bilaterally symmetric as the adults are? Kanenas ( talk) 20:43, 26 July 2008 (UTC)
I did a search on Google Scholar for each of the species listed here, filtering for hits since the year 2000. The number to the left of each item indicate how many hits it got. As a measure of scientific and taxonomic validity, this is obviously WP:OR. On the other hand, it is a replicable measure of notability ( WP:NOTABLE).
17 Asymmetron inferum 78 Asymmetron lucayanum 1 Epigonichthys australis 0 Epigonichthys bassanus 0 Epigonichthys cingalensis 7 Epigonichthys cultellus 5 Epigonichthys hectori 29 Epigonichthys maldivensis 0 Branchiostoma africae 0 Branchiostoma arabiae 0 Branchiostoma bazarutense 2420 Branchiostoma belcheri 2 Branchiostoma bennetti 1 Branchiostoma bermudae 38 Branchiostoma californiense 0 Branchiostoma capense 68 Branchiostoma caribaeum 0 Branchiostoma clonaseum 20 Branchiostoma elongatum 3510 Branchiostoma floridae 0 Branchiostoma gambiense 7 Branchiostoma indicum 207 Branchiostoma japonicum 1350 Branchiostoma lanceolatum 0 Branchiostoma leonense 1 Branchiostoma longirostrum 10 Branchiostoma malayanum 0 Branchiostoma moretonense 39 Branchiostoma nigeriense 43 Branchiostoma platae 16 Branchiostoma senegalense 0 Branchiostoma tattersalli 33 Branchiostoma virginiae
Zyxwv99 ( talk) 02:19, 15 December 2015 (UTC)
Lancelets produce
GFP. I added an updated diagram based off of recent literature (2017).
(
Single Eukaryote |
talk | 22:16, 13 January 2021 (UTC))