Bivalvia - Thraciida - Thraciidae
Parent taxon: Thracia according to A. J. W. Hendy 2020
See also Kafanov and Ogasawara 2003
Sister taxa: Thracia (Crassithracia), Thracia (Cyathodonta), Thracia (Homoeodesma), Thracia (Ixartia), Thracia (Odoncineta), Thracia (Thracia), Thracia alciope, Thracia applanata, Thracia brioni, Thracia curtansata, Thracia declivis, Thracia depressa, Thracia dilleri, Thracia gibsonensis, Thracia grignonensis, Thracia incerta, Thracia jacalitosana, Thracia kanakoffi, Thracia karquinesensis, Thracia keaseyensis, Thracia kissoumi, Thracia lenticularis, Thracia ludovica, Thracia mactroides, Thracia mactropsis, Thracia oblata, Thracia papyracea, Thracia parvula, Thracia prisca, Thracia proavita, Thracia schencki, Thracia sorrentoensis, Thracia stelcki, Thracia suciensis, Thracia ventricosa, Thracia viceliacensis, Thracia weedi, Eximiothracia perscabrosa
Subtaxa: Thracia (Cetothrax) condoni
Ecology: facultatively mobile deep infaunal suspension feeder
Distribution:
• Pliocene of the Russian Federation (1 collection)
• Miocene of the Russian Federation (7)
• Oligocene of the Russian Federation (5), United States (9: Alaska, Oregon, Washington)
• Eocene of United States (15: Oregon)
• Paleocene to Eocene of United States (1: California)
Total: 38 collections each including a single occurrence