Alligator mcgrewi explained

Alligator mcgrewi is an extinct species of alligator described by K.P. Schmidt in 1941. They lived in the Early Miocene period,^[1] and their range was principally in what is now Nebraska, United States.^[2] It is a small alligator with an estimated body length of 1.6m (05.2feet).^[3] 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:^{[4] [5]}

Notes and References

1. 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.
2. Web site: †Alligator mcgrewi Schmidt 1941 (Alligator) . Paleobiology Database . Fossilworks . 13 November 2020.
3. Ikejiri, T.. 2010. Morphology of the Neurocentral Junction during Postnatal Growth of Alligator (Reptilia, Crocodylia). University of Michigan. PhD.
4. Hastings . A. K. . Bloch . J. I. . Jaramillo . C. A. . Rincon . A. F. . MacFadden . B. J. . Systematics and biogeography of crocodylians from the Miocene of Panama . 10.1080/02724634.2012.713814 . Journal of Vertebrate Paleontology . 33 . 2 . 239 . 2013 . 2013JVPal..33..239H . 83972694 . free .
5. Brochu . C. A. . 10.1111/j.1096-3642.2011.00716.x . Phylogenetic relationships of Necrosuchus ionensis Simpson, 1937 and the early history of caimanines . Zoological Journal of the Linnean Society . 163 . S228–S256 . 2011 . free .