†Trinacria (Pachecoa) Harris 1919 (clam)
Full reference: G. D. Harris. 1919. Pelecypoda of the St. Maurice and Claiborne stages. Bulletins of American Paleontology 6(31):1-208
Parent taxon: Trinacria according to G. D. Harris 1919
Sister taxa: Trinacria adamsi, Trinacria cancellata, Trinacria cor, Trinacria cuneus, Trinacria menthifontis, Trinacria nipponica, Trinacria ovalis
Subtaxa: Trinacria (Pachecoa) cainei
Ecology: facultatively mobile epifaunal suspension feeder
Distribution:
• Eocene of United States (2: South Carolina collections)
Total: 2 collections each including a single occurrence