digplanet beta 1: Athena
Share digplanet:

Agriculture

Applied sciences

Arts

Belief

Business

Chronology

Culture

Education

Environment

Geography

Health

History

Humanities

Language

Law

Life

Mathematics

Nature

People

Politics

Science

Society

Technology

Yunnanozoon
Temporal range: Early cambrian
Yunnanozoon Alone.png
Scientific classification
Kingdom: Animalia
Superphylum: Deuterostomia
Phylum: Chordata?
Genus: Yunnanozoon
Binomial name
Yunnanozoon lividum
Chen et al., 1995

Yunnanozoon lividum ("Livid Animal of Yunnan") is an extinct deuterostome suspected of being either a hemichordate[1] or chordate,[2] from the Lower Cambrian, Chengjiang biota of Yunnan province, China.

Yunnanozoon is similar to the form Haikouella[3] which is almost certainly a chordate. Still, there are anatomical differences from Haikouella, including a smaller stomach and much larger (1 mm) pharyngeal teeth. It is by no means certain whether Yunannozoon possessed features such as a heart, gills, etc., which are seen in well-preserved specimens of Haikouella. Yunnanozoon somewhat resembles the Middle Cambrian Pikaia from the Burgess shale of British Columbia in Canada. Thirteen pairs of symmetrically arranged gonads have been identified, as have possible gill slits. However, some authors think that Yunnanozoon is closely related to the chordate Haikouella and that Yunnanozoon is probably a chordate rather than a hemichordate. A close relationship between Yunnanozoon and the taxon Vetulicolia has also been proposed.

See also[edit]

References[edit]

  1. ^ Shu, D., Zhang, X. and Chen, L. 1996. Reinterpretation of Yunnanozoon as the earliest known hemichordate, Nature. 380:428–430 (4 April 1996). [1] – accessed 3 December 2005
  2. ^ J. J. Sepkoski. 2002. A compendium of fossil marine animal genera. Bulletins of American Paleontology 363:1–560
  3. ^ Chen (2009). "The sudden appearance of diverse animal body plansduring the Cambrian explosion". The International journal of developmental biology 53 (5–6): 733–751. doi:10.1387/ijdb.072513cj. PMID 19557680.  edit

External links[edit]


Original courtesy of Wikipedia: http://en.wikipedia.org/wiki/Yunnanozoon — Please support Wikipedia.
This page uses Creative Commons Licensed content from Wikipedia. A portion of the proceeds from advertising on Digplanet goes to supporting Wikipedia.
3 videos found

樹谷生活科學館內最古老的脊索動物雲南蟲

雲南蟲Yunnanozoon 我的名字是「雲南蟲」,我是地球上最古老的脊索動物。人類也是脊索動物,所以我可能是你的老祖先喔! 我的身上有三個重要特徵:脊索、神經索以及鰓裂。 首先,我的脊索是柔軟有彈性, ...

Re: Refuting Evolution Part 1

1: http://www.gcssepm.org/special/cuffey_05.htm 2: Mammal-Whale Transitions: http://www.talkorigins.org/indexcc/CC/CC216_1.html 2a: Fish - Tetrapod Transitio...

Burgess Shale type fauna

A number of assemblages bear fossil assemblages similar in character to that of the Burgess Shale. While many are also preserved in a similar fashion to the ...

 
3 videos found

4 news items

 
Gazeta Wyborcza
Thu, 19 Dec 2013 16:34:09 -0800

Sam badałem skamieniałość Yunnanozoon wiele lat po odkryciu jej przez kogoś innego i wtedy dostrzegłem, że to pierwotny strunowiec. Jeśli bym więc życzył sobie czegoś od Świętego Mikołaja, to właśnie narodowego muzeum przyrodniczego. Antropolog
 
Элементы
Fri, 16 Mar 2012 04:54:24 -0700

В отложениях кембрийского периода найдены отпечатки разнообразных мягкотелых животных, похожих на примитивных хордовых. Большинство форм представлено единичными экземплярами неполной сохранности, поэтому детали их ...

ITmedia eBook USER

ITmedia eBook USER
Tue, 25 Jun 2013 21:16:26 -0700

生きるもの ─Yunnanozoon(脊椎動物), 宮原章次, 文芸社, 800. あなたが笑っていると嬉しい, 久野登久子, 文芸社, 1100. ちょっといっぷく、おたすけ船 楽に生きる為のたくさんの言葉, 久保今宮胡, 文芸社, 800. さくら 神様からの使い, 丘野樺, 文芸社, 800. 絆の調べ 母の星と ...
 
Элементы
Mon, 23 Jun 2008 00:00:00 -0700

Международная группа ученых сообщила о прочтении генома ланцетника. Сравнение генома этого примитивного представителя типа хордовых с геномами других животных подтвердило гипотезу, согласно которой на заре эволюции ...
Loading

Oops, we seem to be having trouble contacting Twitter

Support Wikipedia

A portion of the proceeds from advertising on Digplanet goes to supporting Wikipedia. Please add your support for Wikipedia!

Searchlight Group

Digplanet also receives support from Searchlight Group. Visit Searchlight