| 词条 | Cordicephalus gracilis |
| 释义 |
| name = Cordicephalus gracilis | fossil_range = Lower Cretaceous, {{Fossil range|112.0|125.0}} | image = | image_width = 250px | regnum = Animalia | phylum = Chordata | classis = Amphibia | ordo = Anura | subordo = Mesobatrachia | superfamilia = Pipoidea | unranked_genus = Pipimorpha | genus = Cordicephalus | genus_authority = Nevo, 1968[1] |species=†Cordicephalus gracilis }}Cordicephalus gracilis is the only[2] species in the extinct genus Cordicephalus, a genus of prehistoric frogs. Fossils of C. gracilis were found in a lacustrine deposit in Makhtesh Ramon called "Amphibian Hill" and it is believed they lived during the Lower Cretaceous.[1] When first described by Eviatar Nevo of the University of Haifa[3] (in 1968) the genus Cordicephalus was thought to contain two species, C. gracilis and C. longicostatus.[4] Since then it was redescribed and it was determined that C. gracilis was the only species in the genus.[2] EtymologyThe genus' name derives from the Latin cordi (cor meaning heart) and cephalus (meaning head). The name comes from the heart-like shape of its skull. The species name, gracilis, comes from the Latin for slender.[5] DescriptionLike its close relatives, C. gracilis was fairly small, about {{convert|30|mm}} in length. It had a flat skull which was almost as wide as it was long, features usually found in aquatic animals. Other features that support that view that C. gracilis had a mainly aquatic lifestyle is its short axial column as well as large foot bones which may imply extensive webbing.[2] See also{{Portal|Paleontology}}
References1. ^1 {{cite web|url=http://paleodb.org/cgi-bin/bridge.pl?action=checkTaxonInfo&taxon_no=135486&is_real_user=1|title=The Paleobiology Database|accessdate=2009-09-30}} {{Taxonbar|from=Q5169975}}{{DEFAULTSORT:Cordicephalus Gracilis}}2. ^1 2 {{cite journal |last=Trueb|first=Linda|author2=Ana María Báez|date=March 2006|title=Revision of the Early Cretaceous Cordicephalus from Israel and an assessment of its relationships among pipoid frogs |journal=Journal of Vertebrate Paleontology |publisher=The Society of Vertebrate Paleontology |volume=26 |issue=1 |pages=44–59 |url=http://www.amphibiatree.org/sites/amphibiatree.org/files/TruebBaez2006_Cordicephalus.pdf |format=PDF |doi=10.1671/0272-4634(2006)26[44:ROTECC]2.0.CO;2}} 3. ^{{cite web|url=http://research.haifa.ac.il/~evolut/Publications/Nevofullisst.pdf|title=Eviatar Nevo: List of Publications|publisher=University of Haifa|accessdate=2009-10-24}} 4. ^{{citation |url=http://rocek.gli.cas.cz/Reprints/AmphBiol3.pdf |author=Robert L. Carroll |author2=Harold Heatwole|title=Amphibian Biology: The Evolutionary History of Amphibians |volume=4 |accessdate=2009-09-25 |publisher= Surrey Beatty & Sons |page=17}} 5. ^{{cite journal|last=Nevo|first=Eviatar|year=1968|title=Pipid frogs from the Early Cretaceous of Israel and pipid evolution|journal=Bulletin of the Museum of Comparative Zoology|publisher=Harvard University|volume=136|issue=8|pages=255–318|url=https://www.biodiversitylibrary.org/page/4776308#300}} 4 : Prehistoric amphibians of Asia|Prehistoric amphibians|Early Cretaceous frogs|Fossil taxa described in 1968 |
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