Parayunnanolepis xitunensis is an extinct, primitive antiarchplacoderm. The fossil specimens, including a marvelously preserved, intact specimen, are known from the Lochkovian Epoch-aged Xitun Formation of Early Devonian Yunnan. The armor is very similar to that of Yunnanolepis, but is distinguished by being comparatively more flattened.
An intact and exquisitely preserved specimen demonstrates that the living animal had pelvic fins and a pelvic girdle, thus proving that antiarchs had, primitively at least, pelvic girdles, and or inherited them from a common ancestor of both placoderms and other gnathostomes.[1][2]
Referencesedit
^"New study showing pelvic girdles arose before the origin of movable jaws". phys.org. 10 Jan 2012. Retrieved 31 December 2019.
^Zhu, Min; Yu, Xiaobo (4 Jan 2012). "An antiarch placoderm shows that pelvic girdles arose at the root of jawed vertebrates". Royal Society Biology Letters. Retrieved 31 December 2019.
This article about a placoderm is a stub. You can help Wikipedia by expanding it.
parayunnanolepis, xitunensis, extinct, primitive, antiarch, placoderm, fossil, specimens, including, marvelously, preserved, intact, specimen, known, from, lochkovian, epoch, aged, xitun, formation, early, devonian, yunnan, armor, very, similar, that, yunnanol. Parayunnanolepis xitunensis is an extinct primitive antiarch placoderm The fossil specimens including a marvelously preserved intact specimen are known from the Lochkovian Epoch aged Xitun Formation of Early Devonian Yunnan The armor is very similar to that of Yunnanolepis but is distinguished by being comparatively more flattened ParayunnanolepisTemporal range Early Devonian Lochkovian PreꞒ Ꞓ O S D C P T J K Pg N Artist s reconstruction Scientific classification Domain Eukaryota Kingdom Animalia Phylum Chordata Class Placodermi Order Antiarchi Family Yunnanolepididae Genus Parayunnanolepis Species P xitunensis Binomial name Parayunnanolepis xitunensisTong Dzuy amp Janvier 1990 An intact and exquisitely preserved specimen demonstrates that the living animal had pelvic fins and a pelvic girdle thus proving that antiarchs had primitively at least pelvic girdles and or inherited them from a common ancestor of both placoderms and other gnathostomes 1 2 References edit New study showing pelvic girdles arose before the origin of movable jaws phys org 10 Jan 2012 Retrieved 31 December 2019 Zhu Min Yu Xiaobo 4 Jan 2012 An antiarch placoderm shows that pelvic girdles arose at the root of jawed vertebrates Royal Society Biology Letters Retrieved 31 December 2019 nbsp This article about a placoderm is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Parayunnanolepis amp oldid 1020428431, wikipedia, wiki, book, books, library,
