Alligator mcgrewi

Alligator mcgrewi
Temporal range: Early Miocene 20.43–15.97 Ma[1]
↓
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Clade: Archosauromorpha
Clade: Archosauriformes
Order: Crocodilia
Family: Alligatoridae
Subfamily: Alligatorinae
Genus: Alligator
Species:
†A. mcgrewi
Binomial name
†Alligator mcgrewi
Schmidt, 1941

Alligator mcgrewi is an extinct species of alligator described by K.P. Schmidt in 1941. They lived in the Early Miocene period,[2][3] and their range was principally in what is now Nebraska, United States.[2] It is a small alligator with an estimated body length of 1.6 metres (5.2 ft).[4] The Alligator mcgrewi has a unique snout, distinguishing it from other alligator species. This special feature suggests that A. mcgrewi evolved from specific environmental adaptations.

Classification

Alligator mcgrewi is a member of the subfamily Alligatorinae, within the larger family Alligatoridae. It is related to the living American alligator and Chinese alligator, as shown in the cladogram below:[5][6]

Alligatoridae

References

  1. ^ 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.
  2. ^ a b "†Alligator mcgrewi Schmidt 1941 (Alligator)". Paleobiology Database. Fossilworks. Retrieved 13 November 2020.
  3. ^ Alligator mcgrewi Schmidt, 1941 in Paleobiology Database (2018). The Paleobiology Database. Checklist dataset https://doi.org/10.15468/zzoyxi accessed via GBIF.org on 2020-11-05.
  4. ^ Ikejiri, T. (2010). Morphology of the Neurocentral Junction during Postnatal Growth of Alligator (Reptilia, Crocodylia) (PhD thesis). University of Michigan.
  5. ^ Hastings, A. K.; Bloch, J. I.; Jaramillo, C. A.; Rincon, A. F.; MacFadden, B. J. (2013). "Systematics and biogeography of crocodylians from the Miocene of Panama". Journal of Vertebrate Paleontology. 33 (2): 239. Bibcode:2013JVPal..33..239H. doi:10.1080/02724634.2012.713814. S2CID 83972694.
  6. ^ Brochu, C. A. (2011). "Phylogenetic relationships of Necrosuchus ionensis Simpson, 1937 and the early history of caimanines". Zoological Journal of the Linnean Society. 163: S228–S256. doi:10.1111/j.1096-3642.2011.00716.x.


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