†Mactromya Agassiz 1843 (clam)
Bivalvia - Lucinida - Mactromyidae
Parent taxon: Mactromyidae according to H. E. Vokes 1980
Sister taxa: Bathycorbis, Clisocolus, Cordiula, Linetia, Mactromyopsis, Montanaria, Palaeolucina, Paracyclas, Plesiocyprinella, Sexta, Thetironia, Thetis, Unicardium
Subtaxa: Mactromya aequalis, Mactromya crassa, Mactromya daghaniensis, Mactromya quadrata, Mactromya rugosa, Mactromya verioti
Ecology: facultatively mobile infaunal chemosymbiotic