| 词条 | Proteothrinax |
| 释义 |
| name = Proteothrinax baumgartneri | image = | image_caption = | regnum = Animalia | phylum = Chordata | classis = Chondrichthyes | subclassis = Elasmobranchii | superordo = Selachimorpha | ordo = Hexanchiformes | familia = Chlamydoselachidae | genus = Proteothrinax | genus_authority = Pfeil, 2012 | species = P. baumgartneri | binomial = Proteothrinax baumgartneri | binomial_authority = (Pfeil, 1983) | synonyms = Thrinax Pfeil, 1983 non Thrinax Konow, 1885 }} Proteothrinax baumgartneri is an extinct species of shark. It was classified based on two relatively complete teeth and two isolated crowns, described from the Eocene (Lutetian) Weitwies Subformation in Austria.[1] Due to the limited material available and its similarities to Chlamydoselachus fiedleri, it has been suggested that the criteria with which P. baumgartneri is separated from Chlamydoselachus fiedleri are within the normal variation of Chlamydoselachus.[2] This would therefore make P. baumgartneri a junior synonym to Chlamydoselachus fiedleri and, since there is only one identified species within genus Proteothrinax, the whole genus a junior synonym to Chlamydoselachus. References1. ^{{cite book |author=Friedrich H. Pfeil |chapter=Proteothrinax, a new replacement name for Thrinax Pfeil, 1983 (Elasmobranchii: Chlamydoselachidae) |editor=Friedrich H. Pfeil |title=Piscium Catalogus: Elasmobranchii, Pars 1 – Proteothrinax nom. nov. |publisher=Verlag Dr. Friedrich Pfeil |volume= |pages=1 |issn=0724-9012 |year=2012 |chapterurl=http://www.pfeil-verlag.de/07pala/pdf/PC-001_Proteothrinax_nom_nov.pdf}} {{paleo-shark-stub}}2. ^{{cite journal |last = Richter | first = Martha |author2=David J. Ward | title = Fish remains from the Santa Marta Formation (Late Cretaceous) of James Ross Island Antarctica | journal = Antarctic Science | volume = 2 | issue = 1 | pages = 67–76 | date = March 1990 | url = http://journals.cambridge.org/action/displayFulltext?type=1&fid=222834&jid=&volumeId=&issueId=&aid=222833 | doi = 10.1017/S0954102090000074 | quote=no | bibcode = 1990AntSc...2...67R }} 3 : Chlamydoselachidae|Eocene fish of Europe|Eocene sharks |
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