ammonites
Paramentzelia subsphaerica Xu 1978 (lamp shell)

Rhynchonellata - Spiriferinida - Spiriferinidae

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

Belongs to Paramentzelia according to G. R. Xu 1978

Sister taxon: Paramentzelia ovata

Type specimen: Its type locality is Mojiang, Leshan Couny, which is in a Lacian marine horizon in the Kuahongdong Formation of China

Ecology: stationary low-level epifaunal suspension feeder

Average measurements (in mm): shell 17.5 x 19.0