Alternative combination: Platyconcha grandis
Synonyms: Megalosia chuluensis Waterhouse 1988, Wyndhamia circularis Zhang 1976
Full reference: J. B. Waterhouse. 1975. New Permian and Triassic brachiopod taxa. Papers - Department of Geology, University of Queensland 7(1):1-23
Sister taxa: none
- Biplatyconcha grandis: Specimen 380. Its type locality is W1466, Crystal Mountain, Shay Gompa, Karnali, which is in a Changhsingian marine siliciclastic in the Senja Formation of Nepal.
- Megalosia chuluensis: UQ F76010, a shell (Conjoined shell). Its type locality is Chulu Mountain, Manang District, which is in a Changhsingian coastal sandstone in the Senja Formation of Nepal.
- Wyndhamia circularis:
Average measurements (in mm): valve 47.7 x 58.3