Bivalvia - Cardiida - Mactridae

Full reference: J. D. Stilwell and W. J. Zinsmeister. 1992. Molluscan Systematics and Biostratigraphy. Antarctic Research Series, AGU 55

Belongs to Nymphactra according to J. D. Stilwell and W. J. Zinsmeister 1992

Sister taxa: none

Type specimen: USNM 441633, a shell

Ecology: facultatively mobile infaunal suspension feeder

Average measurements (in mm): shell 68.5 x 52.5