Diplommatina halimunensis, Hausdorf, 2017

Hausdorf, Bernhard, 2017, Revision of the Diplommatinidae (Gastropoda: Cyclophoroidea) from Java, Zootaxa 4312 (2), pp. 201-245 : 207-210

Diplommatina halimunensis n. sp.

( Figs 11 , 21 ; Table 1)

Diagnosis. Diplommatina halimunensis n. sp. is characterized by a very widely ribbed (18–23 ribs on the penultimate whorl), small (shell height 2.45–2.8 mm), sinistral shell with two short oblique palatal folds ventrally to ventrolaterally right inside the last whorl.

Shell ( Fig. 21 ; Table 1). Sinistral; ovoid with conical early whorls and a narrowed last whorl; with 5.5–5.75 whorls separated by a deep suture; protoconch smooth; teleoconch with oblique ribs (18–23 on the penultimate whorl; almost the same number on the last whorl); spiral striae between the ribs only locally visible; corneous; subtranslucent; last whorl rounded, with an indistinct ventral constriction; aperture circular, angular at the transition from columellar to basal side; upper insertion of the peristome distinctly ascending towards aperture; insertions of the peristome connected by a weak callus; peristome expanded, thickened, doubled; one short radial palatal fold; aperture with a columellar lamella; with a short indistinct parietal lamella and a weak oblique palatal fold running from the suture leftwards ventrolaterally right inside the last whorl; with a short oblique palatal fold ventrally running from the suture rightwards; umbilicus closed; operculum thin, corneous, circular, paucispiral. Shell height 2.45–2.8 mm, shell diameter 1.45–1.55 mm.

Habitat. In leaf litter in secondary forest on volcanic soils at 1050–1360 m a.s.l.

Type material. Holotype: Indonesia, Java, West Java: Bogor, camera trap location between Andam and Mt. Kendeng, Gunung Halimun-Salak National Park, 1310 m a.s.l., 6°45'03"S 106°31'49"E ( MZB 18887, leg. A.S. Nurinsiyah, I. Fauzia & Y. Prasetio 10 June 2015, D = 1.5 mm, H = 2.8 mm). Paratypes: West Java: Bogor, Mt. Kendeng , Gunung Halimun Salak National Park , 1356 m a.s.l., 6°45'10"S 106°31'49"E ( ZMH 133054 /1); Bogor, Cikaniki, Gunung Halimun-Salak National Park, 1052 m a.s.l., 6°44'47"S 106°32'15"E ( MZB 18888/1).

Distribution ( Fig. 11 ). Diplommatina halimunensis n. sp. is endemic to West Java, where it has been found so far only in Gunung Halimun-Salak National Park.

Etymology. The name refers to Mount Halimun, to which the species is endemic.

Figures

FIGURES 10 – 14. DiStribution of Diplommatinidae in JaVa. 10. Diplommatina planicollis Möllendorff, 1897, Diplommatina heteroglypha Van Benthem Jutting, 1948 and Diplommatina javana Möllendorff, 1897. 11. Diplommatina halimunensis n. sp., Diplommatina kakenca n. sp. and Diplommatina heryantoi n. sp. 12. Diplommatina perpusilla Möllendorff, 1897 and Diplommatina ristiae n. sp. 13. Diplommatina sulcicollis Möllendorff, 1897 and Diplommatina cyclostoma Möllendorff, 1897. 14. Diplommatina calcarata Möllendorff, 1897 and Diplommatina tetragonostoma Möllendorff, 1897.

FIGURES 20 – 22. Diplommatina Spp. from JaVa. 20. Diplommatina sulcicollis Möllendorff, 1897, JaVa (lectotype SMF 105187). 21. Diplommatina halimunensis n. sp., WeSt JaVa: Bogor, between Andam and Mt. Kendeng (holotype MZB 18887). 22. Diplommatina kakenca n. sp., WeSt JaVa: Mt. Cikuray (holotype ZMA 363147). Scale bar = 1.0 mm.