Diplommatina canaliculata Möllendorff, 1887

(Figs 16, 39 – 40; Table 1)

Diplommatina canaliculata Möllendorff, 1887: 312 (Bukit Pondong, MalaySia). Laidlaw 1949: 202, fig. 2a–b. Vermeulen 1993: 32, fig. 35. MaaSSen 2002: 167, fig. 3–4. Panha & Burch 2005: 20, fig. 21.

Diplommatina (Sinica) canaliculata — Kobelt 1902: 458. Zilch 1953: 27, pl. 12 fig. 180.

Diplommatina ornithorica Van Benthem Jutting, 1948: 595, fig. 51 (Mt. TjibodaS, eState of Tjampea, near Buitenzorg, WeSt JaVa, 300 m alt.; partly). Heryanto 2011: 53, fig.

Diagnosis. Diplommatina canaliculata is characterized by a slender, medium-sized shell with distinct extensions of the peristome, a prominent columellar lamella and widely spaced ribs.

Shell (Figs 39–40; Table 1). Dextral; spindle-shaped with slender conical early whorls and a narrowed last whorl; with 7.0–7.75 whorls separated by a deep suture; protoconch smooth; teleoconch with ribs (24–33 on the penultimate whorl; fewer on the last whorl); with or without discernible spiral striae between the ribs; light corneous; subtranslucent; last whorl rounded, with a ventral constriction; aperture subangular, 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 distinct callus; peristome distinctly expanded, usually with 2–3 blunt processes, thickened, doubled; aperture with a prominent columellar lamella; with a parietal lamella, a short spiral palatal fold in the middle of the whorl and a radial palatal fold ventrally inside the last whorl; umbilicus closed; operculum thin, corneous, circular, paucispiral. Shell height 3.05–3.8 mm, shell diameter 1.2–1.7 mm (measurements of specimens from Java).

Remarks. Diplommatina ornithorica (Fig. 39) differs from D. canaliculata from Malaysia (Fig. 40; shell height 3.9–4.9 mm, shell diameter 1.75–2.0 mm) and Borneo (shell height 3.2–4.2 mm, shell diameter 1.3–1.6) only in the on average smaller shell. Therefore, we synonymized D. ornithorica van Benthem Jutting, 1948 with D. canaliculata Möllendorff, 1887 .

Habitat. In leaf litter and on limestone rocks in plantations and secondary forests on calcareous soils at 11–795 m a.s.l.

Type material. Malaysia: Malakka, Bukit Pondong, Perak (lectotype of D. canaliculata [designated by Zilch 1953] SMF 105394; paralectotypes of D. canaliculata SMF 105395/5, 105396/2).—Indonesia, Java, West Java: Bogor, Ciampea, Mt. Cibodas, 300 m a.s.l., 6°33'S 106°41'E (holotype of D. ornithorica ZMA 135961).

Other material. Indonesia, Java, Banten: Pulau Panaitan off the west coast of Java, 11 m a.s.l., 6°35'22''S 105°12'10''E (RMNH 44475 /6, vouchers to Vermeulen 1993).— West Java: Bogor, Ciampea, Mt. Cibodas, 300 m a.s.l., 6°33'S 106°41'E (ZMA 402226 /2); Sukabumi, Nyalindung, secondary forest in Buniayu, 795 m a.s.l., 7°02'11"S 106°54'25"E (MZB 18792/8; ZMH 133001 /5); Sukabumi, Nyalindung, Rasamala ( Altingia) forest in Buniayu, 805 m a.s.l., 7°02'10"S 106°54'34"E (MZB 18791/2; ZMH 133000 /1); Sukabumi, Siluman Cave, 789 m a.s.l., 7°01'31''S 106°55'35''E (MZB 13723/1).

Distribution (Fig. 16). Diplommatina canaliculata is known from Thailand (Panha & Burch 2005), Malaysia (Möllendorff 1887; Laidlaw 1949), Sumatra (Vermeulen 1993; Maassen 2002), Java and Borneo (Vermeulen 1993).