Paralligator

Paralligator is an extinct genus of neosuchian crocodile that lived during the Late Cretaceous (Maastrichtian) period in what is now the Gobi desert of Mongolia, approximately 71-70 million years ago.[1]

Paralligator
Temporal range: Late Cretaceous, 71–70 Ma
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Family: Paralligatoridae
Konzhukova, 1954
Genus: Paralligator
Konzhukova, 1954
Species
  • P. gradilifrons Konzhukova, 1954 (type)
  • P. major Efimov, 1981 (type)

Paleobiology

Paralligator probably would have had to raise its head completely out of the water to breathe. As this cranial morphology does not suit an ambush predator, it lends support to the idea of a diet of aquatic invertebrates. The teeth were adapted to crush bivalves, gastropods and other animals with a shell or exoskeleton.

Taxonomy

Two species are recognized, Paralligator gradilifrons and P. major.[2][3]

Misassigned species

"Paralligator" sungaricus, described from the Early Cretaceous Nenjiang Formation of Jilin Province, China, is based on postcranial remains consisting of a few presacral vertebrae, dorsal osteoderms, a partial left femur, and the proximal part of a left tibia and fibula.[4][5] However, the type material is too fragmentary to be considered diagnostic, and the species is a nomen dubium.[1]

References

  1. ^ a b Turner AH (2015) A Review of Shamosuchus and Paralligator (Crocodyliformes, Neosuchia) from the Cretaceous of Asia. PLoS ONE 10(2): e0118116. doi:10.1371/journal.pone.0118116
  2. ^ Konzhukova ED (1954) [New fossil crocodilian from Mongolia]. Trudy Paleontologicheskogo Instituta ANSSSR 48: 171–194.
  3. ^ Efimov MB (1981) New paralligatorids from the Upper Cretaceous of Mongolia. Trudy Sovmestnoi Sovetsko-Mongol'skoi Paleontologicheskoi Ekspeditsii 15: 26–28.
  4. ^ Sun, A.-L. (1958). "A new species of Paralligator from Sungarian Plain". Vertebrata PalAsiatica. 2 (4): 277–280.
  5. ^ Wu, X.-C.; Cheng, Z.-W.; Russell, A. P. (2001). "Cranial anatomy of a new crocodyliform (Archosauria: Crocodylomorpha) from the Lower Cretaceous of Song-Liao Plain, northeastern China". Canadian Journal of Earth Sciences. 38: 1653–1663. doi:10.1139/cjes-38-12-1653.
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Amphicotylus

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Anthracosuchus

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Atlantosuchus

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Atoposauridae

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Brillanceausuchus

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Coelosuchus

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Eusuchia

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Karatausuchus

Karatausuchus is an extinct genus of atoposaurid crocodylomorph. It is known from a single specimen discovered in the Late Jurassic (Oxfordian - Kimmeridgian) Karabastau Svita from the vicinity of Mikhailovka in the Karatau Mountains of southern Kazakhstan. The type specimen is PIN 25858/1, a complete but poorly preserved juvenile skeleton with some possible soft tissue preservation. It is notable for having over 90 teeth, but its other anatomical details are difficult to discern. The length of this individual is estimated at 160 millimetres (6.3 in). Karatausuchus was described in 1976 by Mikhail Efimov, and the type species is K. sharovi.

Khoratosuchus

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Laganosuchus

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Nannosuchus

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Paralligatoridae

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Sabresuchus

Sabresuchus is an extinct genus of neosuchian crocodyliform from the Cretaceous of Europe. The name is derived from 'Sabre' in reference to the enlarged and curved fifth maxillary tooth, and 'suchus' from the Ancient Greek for crocodile.

Shamosuchus

Shamosuchus is an extinct genus of neosuchian crocodile that lived during the Late Cretaceous (Santonian-Campanian) period in what is now the Gobi desert of Mongolia, approximately 85 to 74 million years ago.

Symptosuchus

Symptosuchus is an extinct genus of goniopholidid mesoeucrocodylian. It is known from the Late Cretaceous of Argentina. Argentine paleontologist Florentino Ameghino named the genus in 1899, along with the type species S. contortidens. It was formally described by Carlos Rusconi in 1934.

Wahasuchus

Wahasuchus is a genus of extinct mesoeucrocodylian of the Middle Campanian age found in the Quseir Formation, Egypt. The generic name derives from the Arabic word واحة (waha), which means "oasis", and souchos from the Greek in honor of crocodile-headed god of ancient Egypt. The specific egyptensis (Lat.) means from Egypt.Fossils of skull and jaw fragments, dorsal vertebrae, and fragmentary appendicular remains have been recovered.

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