Systematic revision of the Plectopylinae (Gastropoda, Pulmonata, Plectopylidae) Author Páll-Gergely, Barna 31E196E9-5A51-4295-9A36-D5DA689502B7 Centre for Agricultural Research, Hungarian Academy of Sciences (MTA), Herman Ottó Street 15, Budapest, H- 1022, Hungary. pall-gergely.barna@agrar.mta.hu text European Journal of Taxonomy 2018 2018-08-16 455 1 114 journal article 22297 10.5852/ejt.2018.455 44a2fcf6-cc1b-4c07-9554-dd6dd279a76d 3817707 C445E95B-446A-4601-AAA3-C1CCBAB627F9 Chersaecia shiroiensis shiroiensis (Godwin-Austen, 1875) Figs 24I–J, 30A Helix ( Plectopylis ) shiroiensis Godwin-Austen, 1875b: 609 , 613, pl. 73, fig. 3–3c [“slopes of the peak of Shiroifurar, N.E. of Munipúr, at an altitude of from 8000 to 9000 feet ”]. Helix ( Plectopylis ) shiroiensis – Hanley & Theobald 1876: 64, pl. 159, fig. 7. — Nevill 1878: 70 . — Tryon 1887: 163 , pl. 35, fig. 90. Plectopylis shiroiensis – Gude 1896a: 155–156 , fig. 20a–d. Plectopylis ( Chersaecia ) shiroiensis – Gude 1899d: 148 ; 1899e: 175 ; 1914b: 105–106 , fig. 49a–d. Chersaecia shiroiensis – Páll-Gergely et al. 2015c: 10 . Diagnosis Intermediate and lower plicae present. Material examined Syntypes INDIA : 10 shells, Naga Hills, Shiroifurar ( NHMUK 1903.7.1.747). Additional material INDIA : 2 shells, Naga Hills, Japvo Pk, 10 000 ft a.s.l., coll. Godwin-Austen ( NHMUK 1903.7.1.748); 1 shell, Naga Hills, Kopamedza Pk, coll. Godwin-Austen ( NHMUK 1903.7.1.775); 1 shell, Burrail, Japvo Pk., coll. Godwin-Austen ( NHMUK ); 1 shell, Naga Hills, Ogle leg., coll. Godwin-Austen ( NHMUK 1903.7.1.232); many shells, Shiroifurar, NE Manipur , Assam , coll. Godwin-Austen ( NHMUK ); 1 shell, Munipur, 1875, Nevill leg. ( NHMUK 1891.3.17.350–351); 3 shells, India ( NHMUK 1909.1.26.74[?]); 2 adult shells, 1 juv. shell, Gazifhima, Lahupa, Naga Hills, Godwin-Austen leg. ( NHMUK 1903.7.1.778). Description SHELL. Sinistral, light brownish or yellowish, small, spire slightly elevated; protoconch consists of 2.25 whorls, separated by shallow suture, finely, rather regularly wrinkled with extremely fine granular structure; entire shell with 5.5–6 whorls (n = 4); suture of teleoconch deep; teleoconch finely reticulated, radial lines usually dominant, but on dorsal side of last whorl spiral lines stronger; ventral surface also reticulated; aperture semilunar; peristome white, conspicuously thickened and strongly reflected; parietal callus V-shaped with the upper part of V being shorter; apertural fold prominent, continuous with main plica; periumbilical region slightly keeled, last half whorl slightly angulated and dorsolaterally depressed; last half whorl flares away from umbilicus; this modifies the regular infundibular shape of umbilicus (behind aperture, inside the last half whorl there is a slight canal). Five shells were opened. Parietal wall with a vertical lamella, which has the upper end slightly, and the lower end more strongly elongated posteriorly; main plica free from lamella, in contact with apertural fold; main plica slightly curved, its middle portion situated closer to upper suture than its two ends; lower plica starts under lamella, slightly shorter than lamella; intermediate plica approximately as long as lamella, free from it. Palatal plicae six; first and second straight, third slightly oblique; fourth and fifth almost vertical; last one extremely long and rather straight, runs along periumbilical keel; there is an additional free denticle posteriorly. MEASUREMENTS (in mm). D = 8–8.3, H = 4.4–4.5 (NHMUK 1903.7.1.778, n = 2). Differential diagnosis See under Chersaecia shiroiensis subnagaensis subsp. nov. Distribution The nominotypical subspecies is known from a few localities from the Naga Hills of India .