Landouria nusakambangensis, Nurinsiyah & Neiber & Hausdorf, 2019

Nurinsiyah, Ayu Savitri, Neiber, Marco T. & Hausdorf, Bernhard, 2019, Revision of the land snail genus Landouria Godwin-Austen, 1918 (Gastropoda, Camaenidae) from Java, European Journal of Taxonomy 526, pp. 1-73 : 34-36

Landouria nusakambangensis sp. nov.

urn:lsid:zoobank.org:act:3F1A3273-1ECA-4D55-B350-AC9FE593D6AD

Figs 18 , 32 , 49 , 52 ; Tables 3–4

Landouria rotatoria – van Benthem Jutting 1941: 310 (in part). (not Pfeiffer, 1842)

Diagnosis

Landouria nusakambangensis sp. nov. is characterized by a brownish-corneous, keeled shell, a penis with a small globular bulge at the proximal end and a flagellum consisting of a crenated distal part and a long tapering proximal part.

Etymology

Landouria nusakambangensis sp. nov. is named after its occurrence on Nusa Kambangan Island.

Material examined

Holotype INDONESIA • holotype (det. anat.); Central Java, Nusa Kambangan Island, Nature Monument Gligir ; 7°44′ S, 108°53′ E; 15–16 Feb. 1927; P.F. Franck leg.; D = 14.9 mm, H = 9.1 mm; ZMA 412298 a.

Paratypes

INDONESIA • 7 spec. (vouchers for van Benthem Jutting 1941); same data as for holotype; ZMA 412298 • 16 spec. (vouchers for van Benthem Jutting 1941); same data as for holotype; ZMA 410726 • 6 spec. (vouchers for van Benthem Jutting 1941); Nusa Kambangan Island ; 7°44′ S, 108°53′ E; ZMA 407622 .

Description

SHELL (Fig. 49; Tables 3–4 ). Depressed conical, with 5.25–6 hardly convex whorls; protoconch almost smooth; teleoconch with fine, irregular wrinkles; apical side with indistinct incised spiral lines, umbilical side with more distinct spiral lines and a granular sculpture; scaly processes sparse, mainly at periphery; tuberculate around umbilicus; brownish-corneous; body whorl keeled; aperture rounded rhombic; upper insertion of peristome descending; peristome expanded, reflexed and thickened; umbilicus slightly eccentric, wide, comprising 32–40% of shell diameter, hardly obscured by columellar edge.

GENITALIA ( Figs 18 , 32 ; Table 4 ). Atrium short; penis long, becoming broader proximally; with a small globular bulge at proximal end; without penis coecum; membranaceous sheath around distal part of penis connected with proximal part of epiphallus by tissue; penial retractor runs from diaphragm to proximal part of cylindrical epiphallus; flagellum moderately long, broader distal part usually slightly crenated, proximal part tapering towards its proximal end, without node; vas deferens narrow and long; vagina long; oviduct short, broad, proximally tapering; peduncle of bursa copulatrix subdivided into a broader, cylindrical distal part and a narrower, longer proximal part, ending in an elongate oval bursa beside albumen gland. Right ommatophoral retractor runs between penis and vagina.

Remarks

Landouria nusakambangensis sp. nov. resembles L. winteriana , from which it differs in the slightly more distinct keel, the smaller globular bulge at the proximal end of the penis and a longer tapering proximal part of the flagellum. In shell shape and the keeled body whorl, L. nusakambangensis sp. nov. also resembles L. rotatoria , from which it differs in the smaller shell (D 11.9–15.0 mm vs 15.6–19.1 mm in L. rotatoria ) with a wider umbilicus (U/D 0.32–0.40 vs 0.24–0.32 in L. rotatoria ).

Landouria nusakambangensis sp. nov. occurs sympatrically with L. pakidulan sp. nov. ( Fig. 85 ), from which it can easily be distinguished by the brownish, keeled shell.

Distribution

Landouria nusakambangensis sp. nov. is known only from Nusa Kambangan Island (Fig. 52).

Figures

Figs 15–24. Genitalia of species of Landouria from Java. 15. L. winteriana (Pfeiffer, 1842), West Java, Padalarang, Gunung Masigit (neotype, ZMA 376193a). 16. L. rotatoria (Pfeiffer, 1842), West Java, Gunung Salak, 1166 m a.s.l. (neotype, MZB 19205). 17. L. epiplatia (Möllendorff, 1897)?, West Java, Bogor, Gunung Gede (ZMH 79946). 18. L. nusakambangensis sp. nov., Central Java, Nusa Kambangan Island, nature monument Gligir (holotype, ZMA 412298a). 19. L. petrukensis sp. nov., Central Java, Karangbolong, way to Petruk Cave (holotype, MZB 19203). 20. L. tholiformis sp. nov., Yogyakarta, Gunung Kidul, Tepus, near Poktunggal Beach (holotype, MZB 17999). 21. L. abdidalem sp. nov., Yogyakarta, Kulonprogo, Sabrang Kidul (holotype, MZB 17664). 22. L. madurensis sp. nov., East Java, Madura Island, Sampang, Nepa Monkey lowland rainforest (paratype, MZB 19209). 23. L. sewuensis sp. nov., Yogyakarta, Gunung Kidul, Tepus, Mbajo Hill (holotype, MZB 19255). 24. L. sukoliloensis sp. nov., Central Java, Kayen, near Watu Payung (holotype, MZB 19219). Scale bars: 1 mm.

Figs 29–47. Flagella of species of Landouria from Java. 29. L. winteriana (Pfeiffer, 1842), West Java, Padalarang, Gunung Masigit (neotype, ZMA 376193a). 30. L. rotatoria (Pfeiffer, 1842), West Java, Gunung Salak, 1166 m a.s.l. (neotype, MZB 19205). 31. L. epiplatia (Möllendorff, 1897)?, West Java, Bogor, Gunung Gede (ZMH 79946). 32. L. nusakambangensis sp. nov., Central Java, Nusa Kambangan Island, nature monument Gligir (holotype, ZMA 412298a). 33. L. petrukensis sp. nov., Central Java, Karangbolong, way to Petruk Cave (holotype, MZB 19203). 34. L. tholiformis sp. nov., Yogyakarta, Gunung Kidul, Tepus, near Poktunggal Beach (holotype, MZB 17999). 35. L. abdidalem sp. nov., Yogyakarta, Kulonprogo, Sabrang Kidul (holotype, MZB 17664). 36. L. madurensis sp. nov., East Java, Madura Island, Sampang, Nepa Monkey lowland rainforest (paratype, MZB 19209). 37. L. sewuensis sp. nov., Yogyakarta, Gunung Kidul, Tepus, Mbajo Hill (holotype, MZB 19255). 38. L. sukoliloensis sp. nov., Central Java, Kayen, near Watu Payung (holotype, MZB 19219). 39. L. tonywhitteni sp. nov., Central Java, Taruman Village, near Sendang Sedayu (holotype, MZB 19214). 40. L. nodifera sp. nov., Central Java, Larangan Village, Lanang Spring (holotype, MZB 19227). 41. L. pacitanensis sp. nov., East Java, Pacitan, near Srau Beach (MZB 19231). 42. L. intumescens (Martens, 1867), East Java, Guwoterus (MZB 19207). 43. L. smimensis (Mousson, 1848), East Java, Tosari (ZMA 390881). 44. L. zonifera sp. nov., Yogyakarta, Kulonprogo, Sibolong (holotype, MZB 17727). 45. L. ciliocincta (Möllendorff, 1897), East Java, Malang, Kondangmerak (MZB 19211). 46. L. pakidulan sp. nov., Central Java, Nusa Kambangan Island, nature monument Gligir (holotype, ZMA 417011a). 47. L. menorehensis sp. nov., Yogyakarta, Kulonprogo, Sibolong (holotype, MZB 19201). Scale bar: 1 mm.

Figs 48–51 (opposite page). Shells of species of Landouria from Java. 48. L. parahyangensis sp. nov., West Java, Karangnunggal, surroundings of Pasir Taraje Cave (holotype, MZB 20429). 49. L. nusakambangensis sp. nov., Central Java, Nusa Kambangan Island, nature monument Gligir (holotype, ZMA 412298a). 50. L. petrukensis sp. nov., Central Java, Karangbolong, way to Petruk Cave (holotype, MZB 19203). 51. L. tholiformis sp. nov., Yogyakarta, Gunung Kidul, Tepus, near Poktunggal Beach (holotype, MZB 17999). Scale bar: 5 mm.

Figs 52–55 (opposite page). Distribution of species of Landouria in Java (10′ grid). 52. L. winteriana (Pfeiffer, 1842), L. naggsi sp. nov., L. nusakambangensis sp. nov., L. petrukensis sp. nov., L. tholiformis sp. nov., L. tonywhitteni sp. nov., L. smimensis (Mousson, 1848). 53. L. conoidea (Leschke, 1914), L. abdidalem sp. nov., L. sewuensis sp. nov., L. sukoliloensis sp. nov., L. pacitanensis sp. nov., L. intumescens (Martens, 1867), L. madurensis sp. nov. 54. L. rotatoria (Pfeiffer, 1842), L. nodifera sp. nov., L. parahyangensis sp. nov., L. schepmani (Möllendorff, 1897), L. zonifera sp. nov., L. ciliocincta (Möllendorff, 1897), L. pakidulan sp. nov. 55. L. epiplatia (Möllendorff, 1897), L. monticola van Benthem Jutting, 1950, L. davini Dharma, 2015, L. menorehensis sp. nov., L. dharmai sp. nov., L. moussoniana (Martens, 1867).

Figs 85–88. Shells of species of Landouria from Java. 85. L. pakidulan sp. nov., Central Java, Nusa Kambangan Island, nature monument Gligir (holotype, ZMA 417011a). 86. L. dharmai sp. nov., East Java, Tulungagung, Popoh (holotype, MZB 21272). 87. L. davini Dharma, 2015, Central Java, Baturraden, Pancuran Tujuh, Gunung Slamet (holotype, MZB 17063). 88. L. menorehensis sp. nov., Yogyakarta, Kulonprogo, Sibolong (holotype, MZB 19201). Scale bar: 5 mm.