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Living snails of group I: Sarika resplendens group. S. caligina sp. nov. paratype CUMZ 7245; S. lactospira sp. nov. paratype CUMZ 7287; S. megalogyne sp. nov. paratype CUMZ 7522; S. subheptagyra sp. nov. paratype CUMZ 7507. Living snails of group II: Sarika hainesi group. S. bocourti specimen CUMZ 7591; S. inferospira sp. nov. specimen CUMZ 7257; S. melanospira sp. nov. paratype CUMZ 7243; S. pellosa sp. nov. paratype CUMZ 7517. in Pholyotha, Sutcharit, Tongkerd & Panha, 2020. All not to scale. |
Abstract
Members of the land snail genus Sarika Godwin-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 of Sarika is 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 of Sarika are recognised in Thailand, and nine species are new to science, namely Sarika caligina Pholyotha & Panha, sp. nov., S. gratesi Pholyotha & Panha, sp. nov., S. inferospira Pholyotha & Panha, sp. nov., S. lactospira Pholyotha & Panha, sp. nov., S. megalogyne Pholyotha & Panha, sp. nov., S. melanospira Pholyotha & Panha, sp. nov., S. pellosa Pholyotha & Panha, sp. nov., S. solemi Pholyotha & Panha, sp. nov., and S. subheptagyra Pholyotha & Panha, sp. nov. Results from genital examination and COI analyses confirm the monophyly of Sarika and its species. The intra- and inter-specific genetic distances of Sarika were 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 of Sarika species are provided.
Keywords: Diversity, DNA barcodes, Indochina, limestone, systematics
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| Figure 10. Living snails of group I: Sarika resplendens group. A Sarika heptagyra specimen CUMZ 7279 B S. kawtaoensis specimen CUMZ 7738 C S. caligina sp. nov. paratype CUMZ 7245 D S. lactospira sp. nov. paratype CUMZ 7287 E S. megalogyne sp. nov. paratype CUMZ 7522 and F S. subheptagyra sp. nov. paratype CUMZ 7507. All not to scale. |
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| Figure 33. Living snails of group II: Sarika hainesi group. A Sarika bocourti specimen CUMZ 7591 showing no left shell lobe (yellow arrow) B S. hainesi specimen CUMZ 7237 C S. bocourti specimen CUMZ 7591 D S. inferospira sp. nov. specimen CUMZ 7257 E S. melanospira sp. nov. paratype CUMZ 7243, and F S. pellosa sp. nov. paratype CUMZ 7517. Not to scale. |
Arthit Pholyotha, Chirasak Sutcharit, Piyoros Tongkerd and Somsak Panha. 2020. Integrative Taxonomic Revision of the Land Snail Genus Sarika Godwin-Austen, 1907 in Thailand, with Descriptions of Nine New Species (Eupulmonata, Ariophantidae). ZooKeys. 976: 1-100. DOI: 10.3897/zookeys.976.53859