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Yoldiidae Habe, 1977

Common Name: Yoldias


Key morphological features: The shells are equivalve, thin-walled, and elongated oval in shape. The shell is composed of aragonite, and exterior sculpture is typically glossy and smooth, with fine lines.

        SIZE: Up to ~60mm

Paleoecology: The Yoldiidae are marine and live infaunally, buried in sand or mud. They are rapid and strong burrowers, and play a major role in sediment bioturbation. They can be found commonly throughout the world's oceans, where they play a large role in the food chains of commercial fish.

        MOBILITY: Mobile (burrow)

        FEEDING MODE: Deposit Feeder/Suspension Feeder

        HABITAT: Infaunal


Mikkelsen, P.M., and Bieler, R. 2008. Seashells of Southern Florida: Bivalves. Princeton, New Jersey: Princeton University Press. 503 pp.

Cox, L.R., et al. 1969. Systematic Descriptions, in Moore, R. C., ed., Treatise on Invertebrate Paleontology, Part N, Mollusca 6, Volume 1. The University of Kansas and Geological Society of America. 489 pp. 

Genera of Yoldiidae present in the Cretaceous of the Western Interior Seaway