Bivalvia - Trigoniida - Trigoniidae
Parent taxon: Trigonia according to L. R. Cox 1952
See also Fleming 1987
Sister taxa: Trigonia (Clavitrigonia), Trigonia (Heslingtonia), Trigonia (Indotrigonia), Trigonia (Kumatrigonia), Trigonia (Pleurotrigonia), Trigonia (Primatrigonia), Trigonia (Prosogyrotrigonia), Trigonia (Protrigonia), Trigonia aequicostata, Trigonia analoga, Trigonia angulicosta, Trigonia antiqua, Trigonia azzarolae, Trigonia bowersiana, Trigonia carinata, Trigonia castani, Trigonia charlottensis, Trigonia columbiana, Trigonia coqueiroensis, Trigonia depauperata, Trigonia devexa, Trigonia doroschini, Trigonia eufalensis, Trigonia gibboniana, Trigonia hemisphaerica, Trigonia imbricata, Trigonia intersitans, Trigonia kayana, Trigonia kefersteini, Trigonia literata, Trigonia maastrichtiana, Trigonia maloneana, Trigonia marginata, Trigonia melhasei, Trigonia montanaensis, Trigonia mooreana, Trigonia nodulosa, Trigonia obliqua, Trigonia oregona, Trigonia orientalis, Trigonia oviedensis, Trigonia pandicosta, Trigonia papuana, Trigonia picteti, Trigonia plana, Trigonia plumasensis, Trigonia pseudocrenulata, Trigonia pullus, Trigonia rebouli, Trigonia reesidei, Trigonia reticulata, Trigonia somaliensis, Trigonia sulcata, Trigonia tabacoensis, Trigonia thierachensis, Trigonia undulata, Trigonia undulatocostata, Trigonia wilckensi
Subtaxa: Trigonia (Trigonia) angustecostata Trigonia (Trigonia) elegantoides Trigonia (Trigonia) gaytani Trigonia (Trigonia) heva Trigonia (Trigonia) signicollina Trigonia (Trigonia) subcarinata
Ecology: fast-moving shallow infaunal suspension feeder
Distribution:
• Temaikan of New Zealand (1 collection)
• Jurassic of Chile (2), India (56), New Zealand (1), Spain (26), Thailand (2)
• Triassic of Italy (1)
Total: 89 collections including 92 occurrences