Sarika subcornea (Pfeiffer, 1861)

Pholyotha, Arthit, Sutcharit, Chirasak, Tongkerd, Piyoros & Panha, Somsak, 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, pp. 1-100 : 1

Sarika subcornea (Pfeiffer, 1861)

Helix subcornea Pfeiffer, 1861: 20. Type locality: “Siam” [Thailand]; Pfeiffer 1868: 102, 103.

Nanina (Orobia) subcornea : Martens 1867: 73.

Nanina (Macrochlamys) subcornea : Tryon 1886: 92; Fischer and Dautzenberg 1904: 395.

Ariophanta (Macrochlamys) subcornea : Fischer 1891: 21.

Nanina subcornea : Fischer and Dautzenberg 1904: 395; Hemmen and Hemmen 2001: 45.

Sarika subcornea : Maassen 2001: 114.

Type material.

The type specimen could not be located in the NHM collections.

Diagnosis.

Shell depressed, medium size (shell width up to 13.6 mm, shell height up to 6.0 mm) and thin. Shell surface smooth and shining; shell colour whitish horny. Whorls 7½, increasing regularly; body whorl well rounded. Spire elevated; suture impressed. Aperture crescent-shaped and obliquely opened. Peristome simple and slightly thickened. Columellar margin simple. Umbilicus narrowly opened.

Remarks.

The original description is not illustrated, type specimen could not be traced, and no new specimens have been reported so far. Hanley and Theobald (1876: 59, pl. 149, Figs 2 , 3 ) illustrated this species based on a specimen from "Phie Than" [Payathonzu, Myanmar]. But, Blanford and Godwin-Austen (1908) stated that this specimen was instead a juvenile shell of S. resplendens . Recently, Maassen (2001) also reported S. subcornea as a new record from Kedah, Malaysia, but unfortunately without illustration. Therefore, the taxonomic status of this species is still unclear, and we retained this species within the genus Sarika as per Maassen (2001). Godwin-Austen (1883) noted that S. subcornea is distinguished from other species by the relatively more numerous and more closely wound whorls.

Figures

Figure 2. Schematic drawing of the mantle terminology of Sarika showing five mantle lobes (two shell lobes and three dorsal lobes).

Figure 3. An illustrated synopsis of the shell and penis. A shell shape B whorl periphery C inner sculpture of the penis D appendage inside penis (no penial verge, pseudo-verge, and penial verge). Yellow arrowheads indicate the invagination of the penial wall.