Integrative Taxonomic Revision of the Land Snail Genus Sarik

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Integrative Taxonomic Revision of the Land Snail Genus Sarika Godwin-Austen, 1907 (Eupulmonata, Ariophantidae) in Thailand, with Descriptions of Nine New Species

Autors

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

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.

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.

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.

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.