Bivalvia - Cardiida - Ungulinidae
Parent taxon: Diplodonta according to J. A. Todd 2001
See also Adegoke 1977, Dockery 1982, Freneix et al. 1988, Glibert 1985, Moore 1988 and Woodring 1982
Sister taxa: Diplodonta (Microstagon), Diplodonta (Phlyctiderma), Diplodonta (Sphaerella), Diplodonta (Timothynus), 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, Felaniella palmerae, Felaniella confusa, Diplodonta (Felaniella) sericata, Felaniella insula, Felaniella senegalensis, Felaniella (Felaniella), Taras (Taras), Taras orbella, Taras griesensis, Taras goodspeedi, Felaniella (Zemysia) elliptica
Subtaxa: Diplodonta (Diplodonta) adangmarum Diplodonta (Diplodonta) alta Diplodonta (Diplodonta) buwaldana Diplodonta (Diplodonta) collina Diplodonta (Diplodonta) cretacea Diplodonta (Diplodonta) eburnea Diplodonta (Diplodonta) homalostriata Diplodonta (Diplodonta) minor Diplodonta (Diplodonta) nigeriensis Diplodonta (Diplodonta) polita Diplodonta (Diplodonta) rotundata Diplodonta (Diplodonta) stephensoni Diplodonta (Diplodonta) ungulina Diplodonta (Diplodonta) unisulcatus Diplodonta (Diplodonta) woodringi
Ecology: facultatively mobile infaunal suspension feeder
Distribution:
• Quaternary of Djibouti (1 collection), Japan (1), Morocco (1), the Netherlands (1), Turkey (1), United States (1: Florida), Yemen (3)
• Pliocene of Belgium (3), Colombia (1), Costa Rica (1), the Dominican Republic (2), Jamaica (2), the United Kingdom (5), United States (2: North Carolina, Virginia)
• Miocene of Algeria (7), Austria (1), Belgium (1), Bulgaria (2), Colombia (2), the Dominican Republic (1), Germany (2), India (1), Italy (1), Morocco (2), Panama (7), Poland (2), United States (10: California, Florida)
• Oligocene to Miocene of United States (2: Florida)
• Oligocene of Austria (3), Canada (1: British Columbia), Panama (4), United States (16: Alabama, California, Mississippi, North Carolina)
• Eocene of United States (66: Alabama, California, Mississippi, South Carolina, Texas, Virginia, Washington)
• Paleocene of Nigeria (1), United States (3: Maryland, Texas)
Total: 160 collections including 164 occurrences