Bivalvia - Trigoniida - Trigoniidae

Full reference: A. Stoyanow. 1949. Lower Cretaceous stratigraphy in southeastern Arizona. Geological Society of America Memoir 38:1-156

Belongs to Trigonia according to A. Stoyanow 1949

Sister taxa: Trigonia (Kumatrigonia), Trigonia (Trigonia), Trigonia antiqua, Trigonia castrovillensis, Trigonia coqueiroensis, Trigonia eufaulensis gabbi, Trigonia eufaulensis moorei, Trigonia guildi, Trigonia hemisphaerica, Trigonia intersitans, Trigonia kitchini, Trigonia maloneana, Trigonia marginata, Trigonia mearnsi, Trigonia pullus, Trigonia reesidei, Trigonia resoluta, Trigonia reticulata, Trigonia saavedra, Trigonia somaliensis, Trigonia stantoni, Trigonia stolleyi, Trigonia sulcata, Trigonia taffi, Trigonia thierachensis, Trigonia vyschetzkii, Trigonia weaveri, Trigonia zlambachensis

Ecology: facultatively mobile infaunal suspension feeder