†Thyasira (Conchocele) Gabb 1866 (clam)
Bivalvia - Lucinida - Thyasiridae
Parent taxon: Thyasira according to E. J. Moore 1988
See also Hryniewicz et al. 2017
Sister taxa: Thyasira alaskana, Thyasira austrosulca, Thyasira becca, Thyasira chilensis, Thyasira cretacea, Thyasira flexuosa, Thyasira montanita, Thyasira nana, Thyasira olssoni, Thyasira peruviana, Thyasira rashidi, Thyasira sarsii, Thyasira staufti, Thyasira tanabei, Thyasira tessaria, Thyasira xylodia
Subtaxa: Thyasira (Conchocele) conradi Thyasira (Conchocele) folgeri
Ecology: facultatively mobile infaunal chemosymbiotic
Distribution:
• Eocene of United States (8: California, Washington collections)
• Paleocene of Greenland (1)
Total: 9 collections each including a single occurrence