Bivalvia - Trigoniida - Trigonodidae

Alternative combination: Anodontophora breviformis

Full reference: L. F. Spath. 1935. Additions to the Eo-Triassic invertebrate fauna of east Greenland. Meddelelser om Grønland 98(2):1-115

Belongs to Unionites according to K.W. Ciriacks 1963

Sister taxa: Unionites albertii, Unionites borealis, Unionites brevis, Unionites canalensis, Unionites donacinus, Unionites elisabethae, Unionites fassaensis, Unionites gregarius, Unionites griesbachi, Unionites guizhouensis, Unionites letticus, Unionites manmuensis, Unionites minimus, Unionites ovalis, Unionites posterus, Unionites rhomboidalis, Unionites sorokovi, Unionites spicatus, Unionites subrectus, Unionites trapezoidalis

Ecology: facultatively mobile infaunal suspension feeder

Average measurements (in mm): valve length 17.4