Bivalvia - Poromyida - Poromyidae
Alternative spelling: Psilomya
Parent taxon: Liopistha according to B. Musavu Moussavou 2019
See also Popenoe 1937, Sepkoski 2002, Vokes 1980 and Warren 1933
Sister taxa: Leiopistha meekii, Liopistha anaana, Liopistha glabra, Liopistha ligeriensis, Liopistha protexta, Liopistha sergipensis, Liopistha servesensis, Liopistha sulcata, Liopistha superba, Liopistha ventricosa
Subtaxa: Liopistha (Psilomya) allani Liopistha (Psilomya) hardingensis Psilomya peterpondi
Distribution:
• Cretaceous of Brazil (13 collections), Canada (5: Alberta, British Columbia), Colombia (1), Denmark (1), Gabon (2), Peru (4), Poland (5), Spain (1), the United Kingdom (1), United States (19: Arizona, California, New Mexico, Texas, Utah)
Total: 52 collections including 53 occurrences