Temporal range: Late Triassic
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. Some fossils are very well-preserved and include the remains of soft tissues.
- Casey, M. (2005). "Multivariate morphometrics and allometry of the Triassic reptile Tanytrachelos ahynis". Geological Society of America Abstracts with Programs 37 (7): 88.
- 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.