†Pterotrigonia (Acanthotrigonia) van Hoepen 1929
Bivalvia - Trigoniida - Megatrigonioidae
Alternative spelling: Acanthotrigonia
Parent taxon: Pterotrigonia according to M. Tashiro and T. Kozai 1982
See also Cox 1952 and Sepkoski 2002
Sister taxa: Pterotrigonia (Pterotrigonia), Pterotrigonia (Ptilotrigonia), Pterotrigonia (Rinetrigonia), Pterotrigonia (Scabrotrigonia), Pterotrigonia borgesi, Pterotrigonia cristata, Pterotrigonia ethra, Pterotrigonia evansana, Pterotrigonia klamathonia, Pterotrigonia oregana, Pterotrigonia vaelsiensis, Pisotrigonia salebrosa, Rinetrigonia ventricosa
Subtaxa: Acanthotrigonia shepstonei
Distribution:
• Cretaceous of Angola (2 collections), Argentina (1), Japan (9), Mozambique (1)
Total: 13 collections including 14 occurrences