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Temporal range: Late Triassic
Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Order: Protorosauria
Family: Tanystropheidae
Genus: Tanytrachelos
Olsen, 1979
Type species
Tanytrachelos ahynis
Olsen, 1979

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


  1. ^ Casey, M. (2005). "Multivariate morphometrics and allometry of the Triassic reptile Tanytrachelos ahynis". Geological Society of America Abstracts with Programs. 37 (7): 88. 
  2. ^ Casey, M. M.; Fraser, N. C.; Kowalewski, M. (2007). "Quantitative Taphonomy of a Triassic Reptile Tanytrachelos ahynis from the Cow Branch Formation, Dan River Basin, Solite Quarry, Virginia". PALAIOS. 22 (6): 598. doi:10.2110/palo.2006.p06-010r.