Integrative taxonomic revision of the land snail genus Sarika Godwin-Austen, 1907 in Thailand, with descriptions of nine new species (Eupulmonata, Ariophantidae)

Members of the land snail genusSarikaGodwin-Austen 1907 are superficially similar and difficult to differentiate by their shell morphology so that their species limits are still unclear. In order to resolve the taxonomy of this group, a phylogenetic reconstruction ofSarikais presented, based on morphological and anatomical characters, as well as on partial sequences of the mitochondrial cytochrome c oxidase subunit I (COI) gene. In total, 23 species ofSarikaare recognised in Thailand, and nine species are new to science, namelyS. caliginaPholyotha & Panha,sp. nov.,S. gratesiPholyotha & Panha,sp. nov.,S. inferospiraPholyotha & Panha,sp. nov.,S. lactospiraPholyotha & Panha,sp. nov.,S. megalogynePholyotha & Panha,sp. nov.,S. melanospiraPholyotha & Panha,sp. nov.,S. pellosaPholyotha & Panha,sp. nov.,S. solemiPholyotha & Panha,sp. nov., andS. subheptagyraPholyotha & Panha,sp. nov.Results from genital examination and COI analyses confirm the monophyly ofSarikaand its species. The intra- and inter-specific genetic distances ofSarikawere 0–3.7% and 4.6–12.0%, respectively. Colour images of the living adults, shell, and genitalia along with SEM images of the spermatophore and radula are given. In addition, an identification key and a geographical distribution map ofSarikaspecies are provided.