alligator olseni

(editor) 2004. Malone (1979) considered both to be synonymous with Alligator mississippiensis, while Brochu (1999) and Snyder (2001, 2007) regarded both to be valid species closely related to the modern American alligator. Copeia 1942(1):3-7, Belongs to Alligator according to D. Snyder 2007, Sister taxa: Alligator darwini, Alligator gaudryi, Alligator hantoniensis, Alligator heterodon, Alligator luicus, Alligator mcgrewi, Alligator mefferdi, Alligator mississippiensis, Alligator prenasalis, Alligator sinensis, Alligator thomsoni. Morphology and systematics of two Miocene alligators from Florida, with a discussion of Alligator biogeography. This locality is estimated at approximately 23-22 million years ago in the late Arikareean (very early Miocene), which is notably older than the Hemingfordian (early Miocene) age of Thomas Farm (Woodburne, 2004). This fossil material consists of isolated teeth, osteoderms, and a few fragmentary vertebrae and skull bones. Thesis, University of Florida. Wetland. 1887, a skull (well preserved skull). It was described by Theodore E. White on March 24, 1942, in an article “A New Alligator from the Miocene of Florida”. Regarding dentition, the teeth of Gavialosuchus are typically narrower in diameter and taper to a sharper tip, while those of Alligator are usually blunter at the tip and wider in diameter (Fig.
It is the second - smallest species of the family Alligatoridae the smallest being Cuvier s dwarf caiman, also from tropical South, observed occurrence of Varanidae, Chameleon, Cordylidae, Tomistominae, Alligatoridae and giant turtles through the Miocene Climatic Optimum 18 to 16 Ma, rather primitive Sahitisuchus, a sebecosuchian and more derived Alligatoridae post - K - Pg taxa. (a glass snake) Scincidae: (indeterminate species of skink) The two living species are the American alligator (A. mississippiensis) and the Chinese alligator (A. sinensis). 2006 A new giant Purussaurus Crocodyliformes, Alligatoridae from the Upper Miocene Urumaco Formation, Venezuela Journal of Systematic, Ameghiniana 30: 341 - 342. © 2020 | This website uses cookies. The systematics, phylogeny and paleobiology of the genus Alligator. These sites are estimated to be similar in age with, and geographically close to, the type locality (Fig. Pino - logical board game which is based on tactics and strategy. Alligators first appeared during the Oligocene epoch about 37 million years ago. A new alligator from the Miocene of Florida. However, the preserved suture lines on the dentary bone are typically visible and can be used to determine how far anteriorly the splenial extended. Full reference: T. E. White. Teeth and partial osteoderms of the unrelated crocodylian Gavialosuchus are also potentially present at some of these sites (Auffenberg, 1957). Caimans inhabit Mexico, Central and northern, Gavialis gangeticus the gharial Superfamily Alligatoroidea Family Alligatoridae Subfamily Alligatorinae Genus Albertochampsa Genus Alligator Alligator, placed within Alligatoridae and was later refined to the Alligatorinae in 1964, only to be placed outside both Alligatorinae and Alligatoridae but still, alligatoroid crocodilian. In addition, the morphology and sizes of the fossils from these sites are consistent with similar elements from Thomas Farm (Auffenberg, 1957). In Alligator olseni, the splenial usually extends into the mandibular symphysis (Fig. At Thomas Farm, we preserve a large sample of 18-million-year-old alligators that belong to the extinct species Alligator olseni. Full reference: T. E. White. 1942. M.S. There are some other transitional forms potentially separating Olsen’s alligator and the American alligator, although their exact placement within the genus Alligator is debated. Leidyosuchus is an extinct genus of alligatoroid from the Late Cretaceous of Alberta. Until the fossils described by Albright (1994) are reexamined, the assignment of the Toledo Bend material to Alligator olseni is questionable.

Phylogenetics, taxonomy, and historical biogeography of Alligatoroidea. 1979. 3). University Press of Florida, Gainesville. Alligatorine phylogeny and the status of Allognathosuchus Mook, 1921. Woodburne, M. O. Late Cretaceous and Cenozoic Land Mammals of North America: Biostratigraphy and Geochronology. These fossils are an intermediate species between primitive and more recent alligators, and hold important clues to understanding alligator evolution. Corcodilians.

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