Alligator thomsoni

Alligator thomsoni is an extinct species of alligator that existed during the Early Miocene period. Their range was principally in what is now known as Nebraska, United States.^[1][2]

Alligator thomsoni Temporal range: Miocene 16–13.6 Ma PreꞒ Ꞓ O S D C P T J K Pg N ↓
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Reptilia
Clade:	Archosauria
Order:	Crocodilia
Superfamily:	Alligatoroidea
Family:	Alligatoridae
Genus:	Alligator
Species:	†A. thomsoni
Binomial name
†Alligator thomsoni Mook, 1923

Classification

Alligator thomsoni is a member of the subfamily Alligatorinae, within the larger family Alligatoridae. It is closely related to the living American alligator, as shown in the cladogram below:^[3][4]

Alligatoridae

Caimaninae Alligatorinae Ceratosuchus burdoshi† Hassiacosuchus haupti† Navajosuchus mooki† Wannaganosuchus brachymanus† Arambourgia gaudryi† Allognathosuchus polyodon† Allognathosuchus wartheni† Procaimanoidea kayi† Alligator Alligator prenasalis† Alligator mcgrewi† Alligator olseni† Alligator sinensis Chinese alligator Alligator thomsoni† Alligator mefferdi† Alligator mississippiensis American alligator

Measurements

The average measurement for the skull of a A. thomsoni is 363.0 x 223.0 in millimeters. Based on the length, the estimated body mass 67.8 kg.^[1]