"Crocodylus" affinis

Species of reptile (fossil) "Crocodylus" affinis Eocene, 50.3 47.8 Rio Jonathan P. Mannion Philip D. 6 September 2021 Phylogenetic analysis of a new morphological dataset elucidates the evolutionary history of Crocodylia and resolves the long-standing gharial problem PeerJ 9 e12094 10.7717/peerj.12094 34567843 8428266 free Crocodylus affinis NMNH.jpg Skeletal mount (USNM 12719), National Museum of Natural History "Crocodylus" affinis "Crocodylus" affinis Marsh, 1871 * †Crocodylus clavis Cope, 1883 †Brachyuranochampsa zangerli Mook, 1962 "Crocodylus" affinis is an extinct species of crocodyloid from the Eocene of Wyoming. Fossils were first described from the Bridger Formation by American paleontologist Othniel Charles Marsh in 1871. Marsh described the species, along with every other species of crocodyloid in the Bridger Formation, under the genus Crocodylus.Mook C.C. 1921 Description of a skull of a Bridger crocodilian Bulletin of the American Museum of Natural History 44 11 111–116 http://digitallibrary.amnh.org/dspace/bitstream/2246/1728/1/B044a11.pdf The known specimen of "Crocodylus" affinis is a skull found at Grizzly Buttes, Wyoming, measuring 13 inches in length on the upper surface.Marsh, O. C. (1871). Notice of some new fossil reptiles from the Cretaceous and Tertiary formations. American Journal of Science, s3-1(6), 447–459. doi:10.2475/ajs.s3-1.6.447 Recent phylogenetic studies of crocodyloids show that "C." affinis is not a species of Crocodylus, but a genus has not yet been erected to include the species. Other Bridger species such as Crocodylus clavis and Brachyuranochampsa zangerli have been synonymized with "C." affinis.de Buffrenil V. Buffetaut, E. 1981 Skeletal growth lines in an Eocene crocodilian skull from Wyoming as an indicator of ontogenic age and paleoclimatic conditions Journal of Vertebrate Paleontology 1 1 57–65 10.1080/02724634.1981.10011879 1981JVPal...1...57D Brochu C. A. 2000 Phylogenetic relationships and divergence timing of Crocodylus based on morphology and the fossil record Copeia 2000 3 657–673 10.1643/0045-8511(2000)000[0657:pradto]2.0.co;2 thumb|left|The holotype skull of "Crocodylus" affinis (AMNH 6177) on display in the American Museum of Natural History A 2018 tip dating study by Lee & Yates simultaneously using morphological, molecular (DNA sequencing), and stratigraphic (fossil age) data established the inter-relationships within Crocodilia,Michael S. Y. Lee Adam M. Yates 27 June 2018 Tip-dating and homoplasy: reconciling the shallow molecular divergences of modern gharials with their long fossil Proceedings of the Royal Society B 285 1881 10.1098/rspb.2018.1071 30051855 6030529 free which was expanded upon in 2021 by Hekkala et al. using paleogenomics by extracting DNA from the extinct Voay.Hekkala E. Gatesy J. Narechania A. Meredith R. Russello M. Aardema M. L. Jensen E. Montanari S. Brochu C. Norell M. Amato G. 2021-04-27 Paleogenomics illuminates the evolutionary history of the extinct Holocene "horned" crocodile of Madagascar, Voay robustus Communications Biology en 4 1 505 10.1038/s42003-021-02017-0 33907305 8079395 2399-3642 free The below cladogram shows the results of the latest studies, which placed "C." affinis outside of Crocodyloidea, as more basal than Longirostres (the combined group of crocodiles and gavialids). font-size:85%;line-height:85% Crocodylia Alligatoroidea 100 px Prodiplocynodon Asiatosuchus germanicus "Crocodylus" affinis "Crocodylus" depressifrons "Crocodylus" acer Brachyuranochampsa Mekosuchinae Longirostres Crocodyloidea "Crocodylus" megarhinus Crocodylidae 90 px Gavialoidea extinct basal Gavialoids Gavialidae Gavialis 110 px Tomistoma 90 px References B. Q5187411 Category:Crocodilia Category:Eocene crocodylomorphs Category:Eocene reptiles of North America Category:Articles with quotation marks in the title Category:Fossil taxa described in 1871 Category:Taxa named by Othniel Charles Marsh