†Parvamussium thetidis Hedley 1902 (mud scallop)
Bivalvia - Pectinida - Propeamussiidae
Belongs to Parvamussium according to K. Lamprell and T. Whitehead 1992
Sister taxa: Parvamussium alaskensis, Parvamussium duodecimlamellatum, Parvamussium mata, Parvamussium pumilum, Parvamussium retiaculum, Parvamussium salacon, Parvamussium scitulum, Parvamussium squalidulum, Parvamussium torresi, Variamussium clamosseum, Variamussium cancellatum, Variamussium squamigerum, Variamussium anolense, Polynemamussium intuscostatus
Ecology: epifaunal carnivore