Temporal and spatial distribution patterns of the marine–brackish-water bivalve Waagenoperna in China and its implications for climate and palaeogeography through the Triassic–Jurassic transition

Waagenoperna was a genus of epi-byssate, marine to brackish-water/littoral bivalves. It used to be regarded as Late Permian–Late Triassic in age. However, a review of the genus reveals that it did not occur until the Late Triassic, and in the Early Jurassic some species of Waagenoperna (i.e. W. lilingensis, W. mytiloides and W. cf. lilingensis) had a wide distribution in the areas southwest of the Shanghai–Altay Mountain Range, including parts...