†subfamily Megadesminae Vokes 1967 (clam)
Bivalvia - Pholadomyida - Megadesmidae
Parent taxon: Megadesmidae according to M. G. Simóes et al. 1997
Sister taxa: Astartila, Astartilinae, Carnauba, Crassiconcha, Ferrazia, Huabiella, Jacquesia, Megadesmus, Plesiocyprellinae, Plesiocyprinellinae, Pleurikodonta, Pyramus, Romaniamya, Unklesbayella
Subtaxa: Australomya
Ecology: facultatively mobile infaunal suspension feeder
Distribution:
• Permian of Australia (6 collections), the Russian Federation (1)
Total: 7 collections each including a single occurrence