| 词条 | Whatcheeriidae |
| 释义 |
| name = Whatcheeriidae | fossil_range = Early Carboniferous | image = Pederpes22small.jpg | image_caption = Pederpes finneyi | taxon = Whatcheeriidae | authority = Clack, 2002 | subdivision_ranks = Genera | subdivision =
}}Whatcheeriidae is an extinct family of tetrapods which lived in the Mississippian sub-period, a subdivision of the Carboniferous period. It contains the genera Pederpes, Whatcheeria, and possibly Ossinodus. Fossils of a possible whatcheeriid have been found from the Red Hill locality of Pennsylvania. If these remains are from a whatcheeriid, they extend the range of the family into the Late Devonian and suggest that advanced tetrapods may have lived alongside primitive tetrapod ancestors like Hynerpeton and Densignathus.[1] They also imply that a very long ghost lineage of whatcheeriids lived through Romer's gap, a period during the Early Carboniferous conspicuously lacking in tetrapod remains.[2] ClassificationCurrently, using modern cladistic taxonomy, Whatcheeriidae is not placed in Amphibia or any other class but simply as its own family within stem-group tetrapods. The analysis below was conducted by Swartz in 2012, showing the relationship of whatcheeriids with other stem-tetrapods.[3] {{clade| style=font-size:85%;line-height:85%|label1=Elpistostegalia |1={{clade |1=Panderichthys |label2=Stegocephalia |2={{clade |1={{clade |1=Tiktaalik |2=Elpistostege}} |2={{clade |1=Elginerpeton |2={{clade |1=Ventastega |2={{clade |1=Acanthostega |2={{clade |1=Ichthyostega |2={{clade |1=Whatcheeriidae |2={{clade |1=Colosteidae |2={{clade |1=Crassigyrinus |2={{clade |1=Baphetidae |2=Crown group Tetrapoda }} }} }} }} }} }} }} }} }} }} }} References1. ^{{cite journal |last=Daeschler |first=E.B. |author2=Clack, J.A. |author3= Shubin, N.H. |year=2009 |title=Late Devonian tetrapod remains from Red Hill, Pennsylvania, USA: how much diversity? |journal=Acta Zoologica |volume=90 |issue=s1 |pages=306–317 |doi=10.1111/j.1463-6395.2008.00361.x}} 2. ^{{cite journal |last=Smithson |first=T.R. |author2=Wood, S.P. |author3=Marshall, J.E.A. |author4= Clack, J.A. |year=2012 |title=Earliest Carboniferous tetrapod and arthropod faunas from Scotland populate Romer's Gap |journal=Proceedings of the National Academy of Sciences of the United States of America |volume= 109|doi=10.1073/pnas.1117332109 |url=http://www.pnas.org/content/early/2012/02/27/1117332109.abstract?sid=77288ea0-6da6-4f1e-b892-abece2f20bab |pmid=22393016 |pmc=3311392 |pages=4532–4537}} 3. ^{{cite journal | last = Swartz | first = B. | year = 2012 | title = A marine stem-tetrapod from the Devonian of Western North America | journal = PLoS ONE | pmid = 22448265 | volume = 7 | issue = 3 | pmc = 3308997 | pages = e33683 | doi = 10.1371/journal.pone.0033683 | url = http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0033683;jsessionid=E4E007B3FAC50B3B0C7C2B8B0CBE3F83 | format = | accessdate = }}
7 : Carboniferous vertebrates|Mississippian animals|Prehistoric vertebrate families|Tetrapod families|Stegocephalians|Mississippian first appearances|Mississippian extinctions |
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