Bivalvia - Cardiida - Ungulinidae
Alternative spelling: Timothynus
Parent taxon: Diplodonta according to E. V. Coan and P. Valentich-Scott 2012
See also Dockery 1982, Sepkoski 2002, Todd 2001, Vokes 1980 and Ward 1992
Sister taxa: Diplodonta (Diplodonta), Diplodonta (Microstagon), Diplodonta (Phlyctiderma), Diplodonta (Sphaerella), Diplodonta (Zemysina), Diplodonta acclinis, Diplodonta aleutica, Diplodonta astartea, Diplodonta balcombensis, Diplodonta confusa, Diplodonta corbiscula, Diplodonta cornea, 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, Taras griesensis, Taras orbella, Taras (Taras), Taras goodspeedi, Felaniella (Zemysia) elliptica, Felaniella insula, Felaniella senegalensis, Diplodonta (Felaniella) sericata, Felaniella confusa, Felaniella palmerae, Felaniella (Felaniella)
Subtaxa: Diplodonta (Timothynus) bulla Diplodonta (Timothynus) inezensis Timothynus bulla Timothynus capuloides Timothynus subvexa Timothynus turgida
Type: Sphaerella bulla
Ecology: facultatively mobile infaunal suspension feeder
Distribution:
• Pliocene of Jamaica (1 collection)
• Miocene of the Dominican Republic (1), United States (4: Maryland, North Carolina)
• Oligocene of United States (7: Mississippi)
• Eocene of United States (26: Arkansas, Louisiana, Mississippi, Texas)
Total: 39 collections each including a single occurrence