"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.[2] The known specimen of "Crocodylus" affinis is a skull found at Grizzly Buttes, Wyoming, measuring 13 inches in length on the upper surface.[3] 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.[4][5]
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).[6]
^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. doi:10.7717/peerj.12094. PMC8428266. PMID 34567843.
^Mook, C.C. (1921). "Description of a skull of a Bridger crocodilian" (PDF). Bulletin of the American Museum of Natural History. 44 (11): 111–116.
^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
^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. doi:10.1080/02724634.1981.10011879.
^Brochu, C. A. (2000). "Phylogenetic relationships and divergence timing of Crocodylus based on morphology and the fossil record". Copeia. 2000 (3): 657–673. doi:10.1643/0045-8511(2000)000[0657:pradto]2.0.co;2.
^ abMichael 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). doi:10.1098/rspb.2018.1071. PMC6030529. PMID 30051855.
^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. 4 (1): 505. doi:10.1038/s42003-021-02017-0. ISSN 2399-3642. PMC8079395. PMID 33907305.
crocodylus, affinis, extinct, species, crocodyloid, from, eocene, wyoming, fossils, were, first, described, from, bridger, formation, american, paleontologist, othniel, charles, marsh, 1871, marsh, described, species, along, with, every, other, species, crocod. 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 2 The known specimen of Crocodylus affinis is a skull found at Grizzly Buttes Wyoming measuring 13 inches in length on the upper surface 3 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 4 5 Crocodylus affinisTemporal range Eocene 50 3 47 8 Ma 1 PreꞒ Ꞓ O S D C P T J K Pg N Scientific classificationDomain EukaryotaKingdom AnimaliaPhylum ChordataClass ReptiliaOrder CrocodiliaSuperfamily CrocodyloideaSpecies Crocodylus affinisMarsh 1871Binomial name Crocodylus affinisSynonyms Crocodylus clavis Cope 1883 Brachyuranochampsa zangerli Mook 1962 The holotype skull of Crocodylus affinis AMNH 6177 on display in the American Museum of Natural HistoryA 2018 tip dating study by Lee amp Yates simultaneously using morphological molecular DNA sequencing and stratigraphic fossil age data established the inter relationships within Crocodilia 6 which was expanded upon in 2021 by Hekkala et al using paleogenomics by extracting DNA from the extinct Voay 7 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 6 Crocodylia AlligatoroideaProdiplocynodon Asiatosuchus germanicus Crocodylus affinis Crocodylus depressifrons Crocodylus acer Brachyuranochampsa MekosuchinaeLongirostres Crocodyloidea Crocodylus megarhinus CrocodylidaeGavialoidea extinct basal Gavialoids Gavialidae GavialisTomistomaReferences edit 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 doi 10 7717 peerj 12094 PMC 8428266 PMID 34567843 Mook C C 1921 Description of a skull of a Bridger crocodilian PDF Bulletin of the American Museum of Natural History 44 11 111 116 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 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 doi 10 1080 02724634 1981 10011879 Brochu C A 2000 Phylogenetic relationships and divergence timing of Crocodylus based on morphology and the fossil record Copeia 2000 3 657 673 doi 10 1643 0045 8511 2000 000 0657 pradto 2 0 co 2 a b 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 doi 10 1098 rspb 2018 1071 PMC 6030529 PMID 30051855 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 4 1 505 doi 10 1038 s42003 021 02017 0 ISSN 2399 3642 PMC 8079395 PMID 33907305 nbsp This article about a prehistoric archosaur is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title 22Crocodylus 22 affinis amp oldid 1051445852, wikipedia, wiki, book, books, library,
