Megayoldia (Megayoldia) Verrill and Bush 1897 (clam)
Bivalvia - Nuculanida - Sareptidae
Parent taxon: Megayoldia according to Verrill and Bush 1897
Sister taxa: Megayoldia (Hataiyoldia), Megayoldia (Portlandella), Yoldia (Megayoldia) martyria, Yoldia (Megayoldia) montereyensis
Subtaxa: Megayoldia (Megayoldia) thraciaeformis
Ecology: facultatively mobile infaunal deposit feeder
Distribution:
• Pliocene of Japan (1 collection), the Russian Federation (1)
• Miocene of the Russian Federation (13)
• Oligocene to Miocene of the Russian Federation (1)
• Oligocene of the Russian Federation (4), United States (1: Alaska)
Total: 21 collections including 22 occurrences