Rhynchonellata - Terebratulida - Angustothyrididae

Full reference: G. R. Xu. 1978. Triassic Brachiopoda. Palaeontological Atlas of Southwest China - Sichuan Volume 2:267-314

Belongs to Sanqiaothyris according to G. R. Xu 1978

Sister taxa: Rhaetina beskessensis, Rhaetina caucasica, Rhaetina columnaris, Rhaetina elliptica, Rhaetina gregaria, Rhaetina incurvirostra, Rhaetina jomdaensis, Rhaetina ovalis, Rhaetina parva, Rhaetina pyriformis, Rhaetina subcircularis, Rhaetina taurica, Rhaetina tirolensis, Rhaetina zigasiensis, Rhaetinopsis yunnanensis, Rhaetinopsis zadoensis, Rhaetinopsis pentagonalis, Sanqiaothyris elliptica, Sanqiaothyris qabdoensis, Sanqiaothyris circularis, Sanqiaothyris dorsaplana, Sanqiaothyris asymmetros

Type specimen: Its type locality is Majiaoba, Jiangyou County, which is in a Lacian marine horizon in the Kuahongdong Formation of China

Ecology: stationary epifaunal suspension feeder

Average measurements (in mm): shell 15.4 x 13.1, valve 21.2 x 18.2