Helcionelloid molluscs and hyoliths from the Miaolingian (middle Cambrian) of the subsurface of the Delitzsch–Torgau–Doberlug Syncline, northern Saxony, Germany

Abstract

Miaolingian rocks of the Delitzsch–Torgau–Doberlug Syncline yield Helcionelloida and Hyolitha that are otherwise poorly known from this stratigraphical interval in Central Europe. The two faunal intervals from the lower part of the Wuliuan and the lower part of the Drumian Stage include the helcionelloid genera Helcionella, Marocella and Leptostega, and at least nine different species of hyoliths, mostly preserved in a manner that does not permit precise determination, but they distinctly broaden the paragon of the West Gondwana molluscan faunas and revise earlier reports on the faunal spectrum. A new species of Aladraco is introduced as A. kirchhainensis sp. nov.