†Ryderia Wilton 1930 (clam)
Bivalvia - Protobranchia - Polidevciidae
Synonym: Teinonuculana Zhang 1977
Parent taxon: Polidevciidae according to J. Yin and C. A. McRoberts 2006
Sister taxa: none
Subtaxa: Ryderia guangdongensis
Ecology: facultatively mobile infaunal deposit feeder