Longirostres: Difference between revisions
Cougroyalty (talk | contribs) changing to "stem-based group", which is different from "stem group" |
The oldest crocodyloid/longirostrean is Prodiplocynodon, which is from the Maastrichtian (Lance Formation). |
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{{Short description|Clade of crocodilians}} |
{{Short description|Clade of crocodilians}} |
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{{Automatic taxobox |
{{Automatic taxobox |
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| fossil_range = [[ |
| fossil_range = Lat [[Cretaceous]] - Recent, {{fossil range|68|0}} |
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| image = Crocodylus niloticus in Lake Chamo 02.jpg |
| image = Crocodylus niloticus in Lake Chamo 02.jpg |
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| image_caption = [[Nile crocodile]] (''Crocodylus niloticus'') |
| image_caption = [[Nile crocodile]] (''Crocodylus niloticus'') |
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Revision as of 01:13, 23 December 2021
| Longirostres Temporal range: Lat Cretaceous - Recent,
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| Nile crocodile (Crocodylus niloticus) | |
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| Gharial (Gavialis gangeticus) | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Reptilia |
| Clade: | Archosauromorpha |
| Clade: | Archosauriformes |
| Order: | Crocodilia |
| Clade: | Longirostres Harshman et al., 2003 |
| Subgroups | |
Longirostres is a clade of crocodilians that includes the crocodiles and the gavialids, to the exclusion of the alligatoroids. Named in 2003 by Harshman et al., Longirostres is a crown group defined phylogenetically as including the last common ancestor of Crocodylus niloticus and Gavialis gangeticus and all of its descendants.[1]
Traditionally, crocodiles and alligators were considered more closely related and grouped together in the clade Brevirostres, to the exclusion of the gharials. This classification was based on morphological studies primarily focused on analyzing skeletal traits of living and extinct fossil species.[2] However, recent molecular studies using DNA sequencing have rejected Brevirostres upon finding the crocodiles and gavialids to be more closely related than the alligators.[1][3][4][5][6]
Below is a cladogram showing the relationships of the major crocodile groups based on molecular studies:[5][6]
| Crocodylia |
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| (crown group) |
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References
- ^ a b Harshman, J.; Huddleston, C. J.; Bollback, J. P.; Parsons, T. J.; Braun, M. J. (2003). "True and false gharials: A nuclear gene phylogeny of crocodylia" (PDF). Systematic Biology. 52 (3): 386–402. doi:10.1080/10635150309323. PMID 12775527.
- ^ Holliday, Casey M.; Gardner, Nicholas M. (2012). Farke, Andrew A (ed.). "A new eusuchian crocodyliform with novel cranial integument and its significance for the origin and evolution of Crocodylia". PLOS ONE. 7 (1): e30471. Bibcode:2012PLoSO...730471H. doi:10.1371/journal.pone.0030471. PMC 3269432. PMID 22303441.
{{cite journal}}: CS1 maint: unflagged free DOI (link) - ^ Gatesy, J.; Amato, G. (2008). "The rapid accumulation of consistent molecular support for intergeneric crocodylian relationships". Molecular Phylogenetics and Evolution. 48 (3): 1232–1237. doi:10.1016/j.ympev.2008.02.009. PMID 18372192.
- ^ Erickson, G. M.; Gignac, P. M.; Steppan, S. J.; Lappin, A. K.; Vliet, K. A.; Brueggen, J. A.; Inouye, B. D.; Kledzik, D.; Webb, G. J. W. (2012). Claessens, Leon (ed.). "Insights into the ecology and evolutionary success of crocodilians revealed through bite-force and tooth-pressure experimentation". PLOS ONE. 7 (3): e31781. Bibcode:2012PLoSO...731781E. doi:10.1371/journal.pone.0031781. PMC 3303775. PMID 22431965.
{{cite journal}}: CS1 maint: unflagged free DOI (link) - ^ 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.
- ^ a b 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): 1–11. doi:10.1038/s42003-021-02017-0. ISSN 2399-3642.
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