†Pterotrigonia (Ptilotrigonia) van Hoepen 1929 (clam)
Bivalvia - Trigoniida - Megatrigonioidae
Alternative spelling: Ptilotrigonia
Parent taxon: Pterotrigonia according to M. Tashiro 1988
See also Cox 1952 and Sepkoski 2002
Sister taxa: Pterotrigonia (Acanthotrigonia), Pterotrigonia (Pterotrigonia), Pterotrigonia (Rinetrigonia), Pterotrigonia (Scabrotrigonia), Pterotrigonia borgesi, Pterotrigonia cristata, Pterotrigonia ethra, Pterotrigonia evansana, Pterotrigonia klamathonia, Pterotrigonia oregana, Pterotrigonia vaelsiensis, Pisotrigonia salebrosa, Rinetrigonia ventricosa
Subtaxa: Pterotrigonia (Ptilotrigonia) mifunensis Ptilotrigonia lauta
Ecology: facultatively mobile infaunal suspension feeder
Distribution:
• Cretaceous of Japan (4 collections)
Total: 4 collections including 5 occurrences