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dc.contributor.authorChoo, Brian
dc.contributor.authorZhu, Min
dc.contributor.authorQu, Qingming
dc.contributor.authorYu, Xiaobo
dc.contributor.authorJia, Liantao
dc.contributor.authorZhao, Wenjin
dc.date.accessioned2017-04-06T23:38:56Z
dc.date.available2017-04-06T23:38:56Z
dc.date.issued2017-03-08
dc.identifier.citationChoo B, Zhu M, Qu Q, Yu X, Jia L, Zhao W (2017) A new osteichthyan from the late Silurian of Yunnan, China. PLoS ONE 12(3): e0170929. doi:10.1371/journal.pone.0170929en
dc.identifier.issn1932-6203
dc.identifier.urihttp://hdl.handle.net/2328/37120
dc.descriptionCopyright: © 2017 Choo et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.en
dc.description.abstractOur understanding of early gnathostome evolution has been hampered by a generally scant fossil record beyond the Devonian. Recent discoveries from the late Silurian Xiaoxiang Fauna of Yunnan, China, have yielded significant new information, including the earliest articulated osteichthyan fossils from the Ludlow-aged Kuanti Formation. Here we describe the partial postcranium of a new primitive bony fish from the Kuanti Formation that represents the second known taxon of pre-Devonian osteichthyan revealing articulated remains. The new form, Sparalepis tingi gen. et sp. nov., displays similarities with Guiyu and Psarolepis, including a spine-bearing pectoral girdle and a placoderm-like dermal pelvic girdle, a structure only recently identified in early osteichthyans. The squamation with particularly thick rhombic scales shares an overall morphological similarity to that of Psarolepis. However, the anterior flank scales of Sparalepis possess an unusual interlocking system of ventral bulges embraced by dorsal concavities on the outer surfaces. A phylogenetic analysis resolves Sparalepis within a previously recovered cluster of stem-sarcopterygians including Guiyu, Psarolepis and Achoania. The high diversity of osteichthyans from the Ludlow of Yunnan strongly contrasts with other Silurian vertebrate assemblages, suggesting that the South China block may have been an early center of diversification for early gnathostomes, well before the advent of the Devonian “Age of Fishes”.en
dc.language.isoen
dc.publisherPublic Library of Scienceen
dc.rightsCopyright: © 2017 Choo et al.en
dc.subjectgnathostome evolutionen
dc.subjectfossilsen
dc.subjectDevonian.en
dc.subjectSilurian Xiaoxiang Fauna of Yunnan, Chinaen
dc.subjectosteichthyan fossilsen
dc.subjectLudlow-aged Kuanti Formationen
dc.subjectprimitive bony fishen
dc.titleA new osteichthyan from the late Silurian of Yunnan, Chinaen
dc.typeArticleen
dc.identifier.doihttps://doi.org/10.1371/journal.pone.0170929en
dc.rights.holderThe authorsen
dc.rights.licenseCC-BY


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