ammonites
Paradoxipecten trigonalis Feng et al. 1992 (clam)

Bivalvia - Pectinida - Aviculopectinidae

Full reference: Q. L. Feng, X. S. Cui, and B. P. Liu. 1992. Discovery of Late Permian bivalve fauna from Laochang of Lancang, west Yunnan and its biogeographic characteristics. Earth Science - China University of Geosciences 17:512-520

Belongs to Paradoxipecten according to Q. L. Feng et al. 1992

Sister taxa: Paradoxipecten dalongensis, Paradoxipecten flabelliformis, Paradoxipecten jiaheensis, Paradoxipecten latisinus, Paradoxipecten longispinus, Paradoxipecten opisthoclinus

Type specimen: Its type locality is Laochang, Lancang, which is in a Changhsingian marine siliciclastic in the Laochang Formation of China

Ecology: stationary epifaunal suspension feeder

Average measurements (in mm): valve length 17.0