Anisodontosaurus Temporal range:
Middle Triassic,
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Holotype jaw | |
Scientific classification
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Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Reptilia |
Clade: | Archosauromorpha |
Clade: | † Allokotosauria |
Order: | † Trilophosauria |
Family: | † Trilophosauridae (?) |
Genus: | †
Anisodontosaurus Welles, 1947 |
Species: | †A. greeri
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Binomial name | |
†Anisodontosaurus greeri Welles, 1947
|
Anisodontosaurus is an extinct genus of trilophosaurid allokotosaur known from the Middle Triassic Moenkopi Formation of Arizona. [1] The type species, A. greeri, was named and described by Samuel Paul Welles in 1947. [1]
The holotype, a jaw catalogued as UCMP V3922, was discovered in 1940 and was described seven years later. [1]
Apart from the type specimen, Anisodontosaurus is known from the referred specimen UCMP 37815, a right ilium. [2] [3]
Its taxonomic placement was largely unknown (it was placed within the Eosuchia by Welles in 1947) [1] until the holotype was reassessed in 1998, when it was recovered as a lepidosauromorph or a trilophosaurid. [4]
A 2023 redescription of available fossils supported its identification as a trilophosaurid, specifically as the sister taxon to Variodens, from the Late Triassic of the United Kingdom. The clade containing Anisodontosaurus and Variodens is the longest-lasting subset of Trilophosauridae, as Anisodontosaurus is one of the oldest known members of the family while Variodens is among the youngest. [5]
Anisodontosaurus Temporal range:
Middle Triassic,
| |
---|---|
![]() | |
Holotype jaw | |
Scientific classification
![]() | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Reptilia |
Clade: | Archosauromorpha |
Clade: | † Allokotosauria |
Order: | † Trilophosauria |
Family: | † Trilophosauridae (?) |
Genus: | †
Anisodontosaurus Welles, 1947 |
Species: | †A. greeri
|
Binomial name | |
†Anisodontosaurus greeri Welles, 1947
|
Anisodontosaurus is an extinct genus of trilophosaurid allokotosaur known from the Middle Triassic Moenkopi Formation of Arizona. [1] The type species, A. greeri, was named and described by Samuel Paul Welles in 1947. [1]
The holotype, a jaw catalogued as UCMP V3922, was discovered in 1940 and was described seven years later. [1]
Apart from the type specimen, Anisodontosaurus is known from the referred specimen UCMP 37815, a right ilium. [2] [3]
Its taxonomic placement was largely unknown (it was placed within the Eosuchia by Welles in 1947) [1] until the holotype was reassessed in 1998, when it was recovered as a lepidosauromorph or a trilophosaurid. [4]
A 2023 redescription of available fossils supported its identification as a trilophosaurid, specifically as the sister taxon to Variodens, from the Late Triassic of the United Kingdom. The clade containing Anisodontosaurus and Variodens is the longest-lasting subset of Trilophosauridae, as Anisodontosaurus is one of the oldest known members of the family while Variodens is among the youngest. [5]