Tanytrachelos

Tanytrachelos is an extinct genus of tanystropheid archosauromorph reptile from the Late Triassic of the eastern United States.^[1] It contains a single species, Tanytrachelos ahynis, which is known from several hundred fossil specimens preserved in the Solite Quarry in Cascade, Virginia. Abundant fossils of Tanytrachelos are found in a series of lakebed sediments that were deposited over the course of about 350 thousand years in a lake which existed approximately 230 million years ago. Some fossils are very well-preserved and include the remains of soft tissues.^[2][3] Tanytrachelos is the most likely trackmaker of the ichnogenus Gwyneddichnium.^[4]

Tanytrachelos Temporal range: Late Triassic, Carnian PreꞒ Ꞓ O S D C P T J K Pg N
A specimen of Tanytrachelos
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Reptilia
Clade:	†Tanysauria
Family:	†Tanystropheidae
Genus:	†Tanytrachelos Olsen, 1979
Type species
†Tanytrachelos ahynis Olsen, 1979
Synonyms
Gwyneddosaurus? Bock, 1945

A "type A" Tanytrachelos, believed to be a female.

Tanytrachelos remains have also been found in the Chinle Formation of Arizona^[5] and the Lockatong Formation of New Jersey.^[6]