Pachychilus anagrammatus was a species of freshwater snail during the Pliocene or Upper Miocene that lived in what is now Texas.MolluscaBase eds. (2021). MolluscaBase. Pachychilus anagrammatus Dall, 1913 †. Accessed at: https://molluscabase.org/aphia.php?p=taxdetails&id=1260971 on 2022-01-15
References
External links Dall, W. H. (1913). On a brackish water Pliocene fauna of the southern Coastal Plain. Proceedings of The United States National Museum. 46 (2023): 225-237