REVISION OF THE GENUS HELIOPLASMôLITES (HELIOLITOIDEA) AND ITS FIRST RECORD FROM THE SILURIAN OF MONGOLIA

Abstract

The genus Helioplasmolites is revised and only three species are retained, including Hm. dzharensis sp. nov. from the Wenlockian of Northwest Mongolia; ten of the remaining species are transferred to the genera Diploepora, Helenolites, Hemiplasmopora, Lacerites, Mcleodea, Squameolites and? Bogimbailites, and nine are considered as incertae sedis.