†Sphaerium (Amesoda) Rafinisque 1820 (fingernail clam)
Bivalvia - Cardiida - Sphaeriidae
Parent taxon: Sphaerium according to Rafinisque 1820
Sister taxa: Sphaerium cooperi, Sphaerium corneum, Sphaerium hartmanni, Sphaerium nitidum, Sphaerium rivicola, Sphaerium stewartensis, Sphaerium tasmanicum
Subtaxa: Sphaerium (Amesoda) nevadense
Ecology: facultatively mobile infaunal suspension feeder
Distribution: found only at Mopung Hills locality B (Pliocene of Nevada)