Landouria sewuensis, 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 : 42-43

Landouria sewuensis sp. nov.

urn:lsid:zoobank.org:act:2E324442-51A9-4897-9635-22666EF0E037

Figs 23 , 37 , 53 , 58 ; Tables 3–4

Landouria cf. rotatoria – Köhler et al. in press : 6 (in part). (not Pfeiffer, 1842)

Diagnosis

Landouria sewuensis sp. nov. is characterized by a brownish-corneous, sharply keeled shell with a wide umbilicus, a penis that is divided into a long, broad distal and a short, narrow proximal part with a globular bulge at its proximal end, a broad flagellum with two rows of broad tubercles and a globular bulge in the distal part of the vagina.

Etymology

Landouria sewuensis sp. nov. is named after its occurrence in the Gunung Sewu karst region.

Material examined

Holotype

INDONESIA • holotype (det. anat.); Gunung Kidul , Tepus, Mbajo Hill, natural forest; 8°08′33″ S, 110°40′59″ E; 249 m a.s.l.; 8 Aug. 2014; A.S. Nurinsiyah, F.L.H. Irsyad, F.J. Sari and E. Nurlaela leg.; D = 15.1 mm, H = 7.1 mm; MZB 19255.

Paratypes

INDONESIA – Central Java • many spec.; Yogyakarta, Gunung Kidul, Kemadang: Pantai Baron ; 8°07′43″ S, 110°32′54″ E; 20 m a.s.l.; ZMH 140024 • 2 spec. (det. anat.); Gunung Kidul, Tepus, Cemara Udang Hill , secondary forest; 8°08′55″ S, 110°36′37″ E; 39 m a.s.l.; MZB 19261 • 1 spec.; same data as for preceding; ZMH 133418 • many spec.; Gunung Kidul, Tepus, rock above Poktunggal Beach ; 8°09′23″ S, 110°37′22″ E; 10 m a.s.l.; ZMH 140025 • 1 spec. (det. anat.); Gunung Kidul, Tepus, Pego Hill , agroforestry; 8°06′10″ S, 110°37′50″ E; 230 m a.s.l.; MZB 19259 • 1 spec. (det. anat.); Gunung Kidul, Tepus, Pego Hill , agroforestry; 8°06′10″ S, 110°37′51″ E; 244 m a.s.l.; MZB 19258 • 1 spec.; Gunung Kidul, Tepus, near Poktunggal Beach , agroforestry; 8°08′42″ S, 110°37′52″ E; 137 m a.s.l.; MZB 21269 • 3 spec. (det. anat.); same data as for preceding; MZB 19260 • 3 spec.; same data as for preceding; ZMH 79891 • 1 spec. (det. anat.); Gunung Kidul, Tepus, Mbajo Hill , natural forest; 8°08′32″ S, 110°40′58″ E; 281 m a.s.l.; MZB 19257 • 1 spec.; same data as for preceding; ZMH 133419 • 1 spec. (det. anat.); Gunung Kidul, Tepus, Mbajo Hill , natural forest; 8°08′33″ S, 110°40′59″ E; 258 m a.s.l.; MZB 19256 .

Description

SHELL (Fig. 58; 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; scaly processes, if present, at periphery; tuberculate around umbilicus; brownish-corneous; body whorl sharply keeled; aperture rounded rhombic; upper insertion of peristome slightly descending; peristome expanded, reflexed and slightly thickened; umbilicus slightly eccentric, wide, comprising 30–40% of shell diameter, hardly obscured by columellar edge.

GENITALIA ( Figs 23 , 37 ; Table 4 ). Atrium short; penis long, distal part broad, shorter proximal part narrow, with a globular swelling 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 middle of cylindrical epiphallus; flagellum moderately long, broad, with two rows of broad tubercles at margin, tapering towards its proximal end; without node; vas deferens narrow and long; vagina long, distally globularly dilated, constriction towards its middle, becoming broader again towards its proximal end; 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

The shell of L. sewuensis sp. nov. cannot be reliably distinguished from those of L. sukoliloensis sp. nov. (Fig. 59) or L. intumescens ( Figs 72–74 ). Landouria sewuensis sp. nov. differs from these species in the division of the penis into a long, broad distal and a short, narrow proximal part with a globular bulge at its proximal end, the broad flagellum with two rows of broad tubercles and the globular bulge in the distal part of the vagina.

Landouria sewuensis sp. nov. occurs sympatrically with L. tholiformis sp. nov. (Fig. 51). For differences, see remarks under that species.

A sequence of L. sewuensis sp. nov. was included in the phylogenetic analysis of Köhler et al. (in press: fig. 2; ZMH 79891; erroneously labelled “ Sumatra ”) under the name L. cf. rotatoria (not Pfeiffer, 1842).

Distribution

Landouria sewuensis sp. nov. is endemic to the Gunung Sewu karst region in Gunung Kidul Regency (Fig. 53).

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 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 56–59 (opposite page). Shells of species of Landouria from Java. 56. L. abdidalem sp. nov., Yogyakarta, Kulonprogo, Sabrang Kidul (holotype, MZB 17664). 57. L. madurensis sp. nov., East Java, Madura Island, Sampang, Nepa Monkey lowland rainforest (holotype MZB 21432). 58. L. sewuensis sp. nov., Yogyakarta, Gunung Kidul, Tepus, Mbajo Hill (holotype, MZB 19255). 59. L. sukoliloensis sp. nov., Central Java, Kayen, near Watu Payung (holotype, MZB 19219). Scale bar: 5 mm.

Figs 72–75. Shells of species of Landouria from Java. 72. L. intumescens (Martens, 1867), East Java, Surabaya (lectotype, ZMB 5160a). 73. L. intumescens, East Java, Guwoterus (MZB 19207). 74. L. intumescens?, East Java, Wonosari (paralectotype, ZMB 230704). 75. L. moussoniana (Martens, 1867), East Java, Wonosari (syntype, ZMB 109902). Scale bar: 5 mm.