A new species of middle RhuddanianHalysites(Tabulata) from Meitan, northern Guizhou, Southwest China

A new halysitid species, Halysites gaojiangensis, is systematically described from the middle Rhuddanian (Llandovery, Silurian) Wulipo Bed at Gaojiang, Meitan County, northern Guizhou Province, Southwest China. It provides new data for further investigation of the tabulate faunal change across the Ordovician–Silurian transition. Halysites across the Ordovician–Silurian transition is reviewed and briefly discussed.