Biodiversity assessment of the Lower Mekong Basin: evolutionary novelties in gemmular morphotraits of Genus Corvospongilla (Porifera: Spongillida) with description of a new species from Khorat Plateau, and biogeographic notes.

A new occurrence of the genus Corvospongilla (Porifera: Demospongiae) is recorded from the Southeast Asia freshwater of Khorat Plateau, northeast Thailand. This is the second record of the genus from the Lower Mekong Basin with the discovery the new species Corvospongilla lampaoensis sp. nov.