Bivalvia - Cardiida - Ungulinidae
Alternative spelling: Sphaerella
Parent taxon: Diplodonta according to W. C. Mansfield 1940
Sister taxa: Diplodonta (Diplodonta), Diplodonta (Microstagon), Diplodonta (Phlyctiderma), Diplodonta (Timothynus), Diplodonta (Zemysina), Diplodonta acclinis, Diplodonta aleutica, Diplodonta astartea, Diplodonta balcombensis, Diplodonta confusa, Diplodonta corbiscula, Diplodonta cornea, Diplodonta dalli, Diplodonta davisi, Diplodonta dilatata, Diplodonta dissona, Diplodonta ferruginata, Diplodonta globosa, Diplodonta hopkinsiensis, Diplodonta incerta, Diplodonta inconspicua, Diplodonta infrequens, Diplodonta lupinus, Diplodonta mediamericana, Diplodonta nucleiformis, Diplodonta orbella, Diplodonta paralta, Diplodonta parilis, Diplodonta problematica, Diplodonta punctata, Diplodonta shilohensis, Diplodonta soror, Diplodonta subquadrata, Diplodonta subrotunda, Diplodonta subrotundata, Diplodonta subvexa, Diplodonta torelli, Diplodonta transversaria, Diplodonta vaticani, Diplodonta villardeboeana, Diplodonta zelandica, Taras (Diplodonta) alta, Felaniella senegalensis, Diplodonta (Felaniella) sericata, Felaniella palmerae, Felaniella insula, Felaniella confusa, Felaniella (Felaniella), Felaniella (Zemysia) elliptica, Taras goodspeedi, Taras (Taras)
Subtaxa: Diplodonta (Sphaerella) waynensis Sphaerella anteproducaa
Ecology: facultatively mobile infaunal suspension feeder
Distribution: found only at Waynesboro, west (Oligocene of Mississippi)