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 (Scabrotrigonia) eufaulensis, Pterotrigonia borgesi, Pterotrigonia crenulata, Pterotrigonia cristata, Pterotrigonia ethra, Pterotrigonia evansana, Pterotrigonia klamathonia, Pterotrigonia oregana, Pterotrigonia vaelsiensis, Rinetrigonia ventricosa, Notoscabrotrigonia tocaimaana, Pisotrigonia salebrosa
Subtaxa: Pterotrigonia (Ptilotrigonia) mifunensis Ptilotrigonia lauta
Ecology: facultatively mobile infaunal suspension feeder
Distribution:
• Cretaceous of Japan (4 collections), New Zealand (2)
Total: 6 collections including 7 occurrences