Caucasorhynchia trigonalis Sun 1981 (lamp shell)

Rhynchonellata - Rhynchonellida - Allorhynchidae

Full reference: D. L. Sun. 1981. The Mesozoic brachiopods of Xizang. Palaeontology of Xizang, Book III, The Series of the Scientific Expedition to Qinghai-Xizang Plateau 177-260

Belongs to Caucasorhynchia according to D. L. Sun 1981

Sister taxa: Caucasorhynchia altaplecta, Caucasorhynchia baliana, Caucasorhynchia circularis, Caucasorhynchia kunensis, Caucasorhynchia simplexa, Caucasorhynchia worobievi, Caucasorhynchia zhidoensis

Type specimen: Its type locality is Gonjo County, eastern part, which is in an Alaunian marine horizon in the Bolila Formation of China

Ecology: stationary epifaunal suspension feeder

Distribution: found only at Gonjo County, eastern part

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