Bivalvia - Cardiida - Ungulinidae
Alternative spelling: Phlyctiderma
Parent taxon: Diplodonta according to E. V. Coan and P. Valentich-Scott 2012
See also Sepkoski 2002, Todd 2001 and Ward and Blackwelder 1987
Sister taxa: Diplodonta (Diplodonta), Diplodonta (Microstagon), Diplodonta (Sphaerella), 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, Taras goodspeedi, Taras (Taras), Felaniella confusa, Felaniella senegalensis, Felaniella palmerae, Felaniella (Felaniella), Felaniella insula, Diplodonta (Felaniella) sericata, Felaniella (Zemysia) elliptica
Subtaxa: Diplodonta (Phlyctiderma) caelata Diplodonta (Phlyctiderma) semiaspera Diplodonta (Phlyctiderma) semirugosa Phlyctiderma heroni
Type: Diplodonta semiaspera
Ecology: facultatively mobile infaunal suspension feeder
Distribution:
• Quaternary of Cuba (1 collection), United States (7: Florida, Louisiana, North Carolina, South Carolina), Uruguay (2)
• Pliocene of Jamaica (1), Panama (1), Venezuela (2)
• Miocene of United States (4: Florida)
• Eocene of the United Kingdom (2)
Total: 20 collections including 22 occurrences