Bivalvia - Pholadida - Vacunellidae

Alternative combination: Stutchburia argentinensis

Full reference: H. J. Harrington. 1955. The Permian Eurydesma fauna of eastern Argentina. Journal of Paleontology 29(1):112-128

Belongs to Myonia according to M. G. Simões et al. 2012

Sister taxa: Myonia (Myomedia), Myonia (Myonia), Myonia (Pachymyonia), Myonia arbitrata, Myonia carinella, Myonia compacta, Myonia elongata, Myonia gibbosa, Myonia komiensis, Myonia ovata, Myonia sinuosa, Myonia sulcata, Myonia undata

Type specimen: CPBA 5778. Its type locality is Arroyo Piedra Azul, Bed BM6, Sierra Pillahuinco, which is in a Sakmarian marine shale in the Bonete Formation of Argentina.

Average measurements (in mm): shell 35.0 x 15.0, valve length 55.2