Tag Archives: Calipyrgula circumstriata Leonard & Ho

Tryonia circumstriata (Leonard & Ho)

Striped Tryonia (Tryonia circumstriata)

The Striped Tryonia was described in 1960, apparently originally from fossil speciemens collected from Pleistocene deposits on the right bank of the Pecos River in Chandler County, Texas, USA.

The species was later found in the Diamond Y Draw in Pecos County (originally described as a distinct species, Stockton’s Tryonia (Tryonia stocktonensis Taylor) in 1987, but then synonymized with this species). [1]

It appears to be extinct now, however.



[1] Robert Hershler: Systematics of the North and Central American aquatic snail genus Tryonia (Rissooidea: Hydrobiidae) Smithsonian Contributions to Zoology 612: 1-53. 2001


edited: 02.05.2019