Strophomenata - Productida - Strophalosiidae

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

Belongs to Biplatyconcha according to B. Waterhouse and Z. Q. Chen 2007

Sister taxa: none

Type specimens:

• 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