Landouria pakidulan, 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 : 62-64

Landouria pakidulan sp. nov.

urn:lsid:zoobank.org:act:D059D3B1-85D9-4760-B9F2-ABC24A7735ED

Figs 46 , 54 , 70 , 85 ; Tables 3–4

Landouria ciliocincta – van Benthem Jutting 1941: 310 (in part); 1950: 466 (in part). — Dharma 2015: 8 (in part). (not Möllendorff, 1897)

Diagnosis

Landouria pakidulan sp. nov. is characterized by a whitish, depressed conical shell with a reddish-brown band at the angular periphery and a wide umbilicus, a short penis with a large bulge at the proximal end and a moderately long, almost smooth flagellum, which tapers abruptly near its proximal end.

Etymology

Landouria pakidulan sp. nov. (from the Sundanese and Javanese word ʻpakidulanʼ meaning ʻsouthernʼ) is named after its occurrence in southern Java.

Material examined

Holotype

INDONESIA • holotype (det. anat.) (voucher for L. ciliocincta in van Benthem Jutting 1941, 1950); Central Java, Nusa Kambangan Island, Nature Monument Gligir ; 7°44′ S, 108°53′ E; 15.–16 Feb. 1927; P.F. Franck leg.; D = 12.5 mm, H = 6.9 mm; ZMA 417011 a.

Paratypes

INDONESIA – West Java • 2 spec.; Pangandaran, Green Canyon ; 7°44′ S, 108°27′ E; MZB 14067 • 1 spec.; Pangandaran Nature Reserve ; 7°42′ S, 108°39′ E; MZB 6162 . – Central Java • 2 spec. (vouchers for L. ciliocincta in van Benthem Jutting 1941, 1950); same data as for holotype; ZMA 417011 .

Description

SHELL ( Fig. 85 ; Tables 3–4 ). Depressed conical, with 5.25–5.5 slightly 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 not observed; tuberculate around umbilicus; whitish with a reddish-brown band at periphery; body whorl angular; aperture oval; upper insertion of peristome slightly descending; peristome expanded, reflexed and thickened; umbilicus eccentric, wide, comprising 24–30% of shell diameter, hardly obscured by columellar edge.

GENITALIA ( Figs 46 , 70 ; Table 4 ). Atrium short; penis short, almost cylindrical, with a large bulge at proximal end, without penis coecum; membranaceous sheath around distal part of penis; penial retractor not observed; epiphallus cylindrical, short; flagellum moderately long, broadest in its middle part, abruptly tapering near its proximal end, almost smooth, without node; vas deferens narrow and long; vagina long; oviduct short, broad, proximally tapering; peduncle of bursa copulatrix subdivided into a broad, abruptly tapering distal part and a narrower, longer proximal part. Right ommatophoral retractor runs between penis and vagina.

Remarks

Landouria pakidulan sp. nov. shares with L. menorehensis sp. nov. and L. ciliocincta the whitish shell with a brown band at the periphery. Landouria pakidulan sp. nov. differs from L. menorehensis sp. nov. in the more depressed shell (D/H 1.70–1.86 vs 1.31–1.51 in L. menorehensis sp. nov.) with an angular body whorl and a wider umbilicus that comprises 24–30% of the shell diameter (vs 16–24% in L. menorehensis sp. nov.). The holotype and only anatomically examined specimen of Landouria pakidulan sp. nov. ( Figs 70 , 85 ) differs from L. menorehensis sp. nov. ( Figs 71 , 88 ) in the triangular dilation at the proximal end of the penis. More specimens must be examined to corroborate that this is a species specific character and not an individual aberration. Landouria pakidulan sp. nov. differs from L. ciliocincta in the less depressed shell (D/H 1.70–1.86 vs 1.86–2.12 in L. ciliocincta ), the shorter penis and epiphallus, and the longer flagellum.

Distribution

Landouria pakidulan sp. nov. is known from southern Java from Pangandaran in West Java and Nusa Kambangan Island in Central Java (Fig. 54).

Figures

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 63–71. Genitalia of species of Landouria from Java. 63. L. tonywhitteni sp. nov., Central Java, Taruman Village, near Sendang Sedayu (holotype, MZB 19214). 64. L. nodifera sp. nov., Central Java, Larangan Village, Lanang Spring (holotype, MZB 19227). 65. L. pacitanensis sp. nov., East Java, Pacitan, near Srau Beach (MZB 19231). 66. L. intumescens (Martens, 1867), East Java, Guwoterus (MZB 19207). 67. L. smimensis (Mousson, 1848), East Java, Tosari (ZMA 390881). 68. L. zonifera sp. nov., Yogyakarta, Kulonprogo, Sibolong (holotype, MZB 17727). 69. L. ciliocincta (Möllendorff, 1897), East Java, Malang, Kondangmerak (MZB 19211). 70. L. pakidulan sp. nov., Central Java, Nusa Kambangan Island, nature monument Gligir (holotype, ZMA 417011a). 71. L. menorehensis sp. nov., Yogyakarta, Kulonprogo, Sibolong (holotype, MZB 19201). Scale bars: 1 mm.

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.