Pincerna constricta (Benson, 1851)

Pall-Gergely, Barna, Sajan, Sheikh, Tripathy, Basudev, Meng, Kaibaryer, Asami, Takahiro & Ablett, Jonathan D., 2020, Genus-level revision of the Alycaeidae (Gastropoda, Cyclophoroidea), with an annotated species catalogue, ZooKeys 981, pp. 1-220 : 1

Pincerna constricta (Benson, 1851) Fig. 39A

Cyclostoma constrictum Benson, 1851: 184-195.

Alycaeus constrictus var. minor Benson, 1859: 181.

Alycaeus constrictus - Reeve 1878: pl. 5, species 41.

Alycaeus (Alycaeus) constrictus - Kobelt 1902: 343.

Alycaeus (Cycloryx) constrictus - Godwin-Austen 1914: 347-348, pl. 147, figs 4, 4a; Godwin-Austen 1914: 348-349, pl. 154, figs 1, 1a; Gude 1921: 277-278.

Alycaeus (Cycloryx) constrictus , var. minor - Godwin-Austen 1914: 348.

Cycloryx constrictus - Ramakrishna et al. 2010: 70.

Pincerna constricta - Páll-Gergely 2017: 218, fig. 1A.

Type locality.

"ad Darjiling Himalayæ Sikkimensis".

Material examined.

UMZC I.103745 (1 syntype); Rungun Valley, Darjiling, NHMUK 1906.4.4.41 (5 shells).

Remarks.

Protoconch matte, without spiral lines; R1 with very sharp, widely spaced ribs, and extremely fine spiral lines; R2 very short, with alternating darker/wider and much narrower/lighter stripes (altogether ca. 12), overall surface smooth.

Figures

Figure 39. Type species of alycaeid genus-group taxa A Pincerna constricta (Benson, 1851), syntype (NHMUK 1906.4.4.41; type species of Cycloryx) B Pincerna liratula (Preston, 1907), syntype (NHMUK 1907.5.20.191; type species of Pincerna) C Stomacosmethis sarasinorum (Bollinger, 1918), lectotype (NHMB 2411. a; type species of Stomacosmethis). Photographs: Harold Taylor (A, B); Eduard Stoeckli (C).