Seymouria paleoart

Scientific name: Seymouria sanjuanensis
Family: Seymouriidae
Epoch: Permian
Size:60 cm long
Localization: North America

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Description

Our paleoart reconstruction of Seymouria measures about 60 cm and is hand-sculpted. It is made to order.

About this genre:

Seymouria is an extinct genus of tetrapod belonging to the clade Seymouriamorpha. Seymouria lived in the Lower Permian in what is now North America and Germany. They were small, about 60 cm long, and were well adapted to living on land, with many reptilian characteristics, so many that, at first, they were considered primitive reptiles.

The species of this genus had convex neural arches of the vertebrae on their dorsal surface and a canal for the tear duct. They also exhibited a single occipital condyle, a shoulder girdle with a long interclavicular bone, a pelvic girdle joined to the vertebral column by two sacral vertebrae, a widened plate of the ilium to provide more insertion surface to the strong muscles of the hind legs and a formula of the phalanges 2:3:4:5:3(4), similar to that of reptiles.

They had skull bones with depressions and reliefs, the arrangement of the skull bones similar to that of primitive amphibians, with an intertemporal bone, teeth with a labyrinthine structure, the palatals arranged in pairs, as in many labyrinthodonts, the otic notch and auditory apparatus similar to that of modern amphibians (Lissamphibia) and signs, in some fossils, of the existence of lateral line canals.

Bibliographies consulted:

Benton, M. J. (2004) Vertebrate Paleontology, 3rd Ed. Blackwell Science Ltd.
Berman, D. S., R. R. Reisz, & D. A. Eberth. (1987) Seymouria sanjuanensis (Amphibia, Batrachosauria) from the Lower Permian Cutler Formation of north-central New Mexico and the occurrence of sexual dimorphism in that genus questioned. Canadian Journal of Earth Sciences 24: 1769-1784.
Berman, D. S. & amp; amp ;T. Martens. (1993) First occurrence of Seymouria (Amphibia: Batrachosauria) in the Lower Permian Rotliegend of central Germany. Annals of Carnegie Museum 62: 63-79.
Laurin M. (1995) Comparative cranial anatomy of Seymouria sanjuanensis (Tetrapoda: Batrachosauria) from the Lower Permian of Utah and New Mexico. PaleoBios 16: 1-8.
Laurin M. (1996a) A redescription of the cranial anatomy of Seymouria baylorensis, the best known seymouriamorph (Vertebrata: Seymouriamorpha). PaleoBios 17: 1-16.
White, T. E. (1939) Osteology of Seymouria baylorensis Broili. Bulletin of the Museum of Comparative Zoology 85: 325-409.

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