Landouria petrukensis, 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 : 36-37

publication ID	https://doi.org/ 10.5852/ejt.2019.526
publication LSID	lsid:zoobank.org:pub:3FFC527D-E9CA-4D9F-BF59-076FA60171AC
DOI	https://doi.org/10.5281/zenodo.5587346
persistent identifier	https://treatment.plazi.org/id/32D7E6E9-561F-4E05-95D2-66295BFD6C5E
taxon LSID	lsid:zoobank.org:act:32D7E6E9-561F-4E05-95D2-66295BFD6C5E
treatment provided by	Plazi
scientific name	Landouria petrukensis
status	sp. nov.

Treatment

Landouria petrukensis View in CoL sp. nov.

urn:lsid:zoobank.org:act:32D7E6E9-561F-4E05-95D2-66295BFD6C5E

Figs 19 View Figs 15–24 , 33 View Figs 29–47 , 50 View Figs 48–51 , 52 View Figs 52–55 ; Tables 3–4 View Table 3 View Table 4

Diagnosis

Landouria petrukensis sp. nov. is characterized by a rather high, sharply keeled shell with small scales all over the teleoconch, a penis that is divided into a long, broad, cylindrical distal part and a slightly dilated proximal part by a narrow point and a flagellum, which is broadest near its proximal end.

Etymology

Landouria petrukensis sp. nov. is named after its occurrence in the surroundings of Petruk Cave in Karangbolong.

Material examined

Holotype

INDONESIA • holotype (det. anat.); Karangbolong , way to Petruk Cave; 7°42′ S, 109°24′ E; 78 m a.s.l.; 5 Aug. 2014; A.S. Nurinsiyah, F.L.H. Irsyad, F.J. Sari and E. Nurlaela leg.; D = 8.7 mm, H = 5.2 mm; MZB 19203. GoogleMaps

Paratypes

INDONESIA – Central Java • 6 spec.; Karangbolong, near Petruk Cave , agroforestry; 7°42′17″ S, 109°23′59″ E; 78 m a.s.l.; MZB 19273 GoogleMaps • 2 spec.; same data as for preceding; ZMH 133409 View Materials GoogleMaps • 1 spec.; same data as for preceding; MZB 19204 GoogleMaps • 5 spec.; Karangbolong, near Petruk Cave , agroforestry; 7°42′19″ S, 109°24′02″ E; 78 m a.sl.; MZB 19265 GoogleMaps • 4 spec.; same data as for preceding; ZMH 133417 View Materials GoogleMaps • 4 spec.; Karangbolong, wall and surroundings of Petruk Cave ; 7°42′21″ S, 109°24′03″ E; 104 m a.s.l.; MZB 19266 GoogleMaps • 3 spec.; same data as for preceding; MZB 19267 GoogleMaps • 5 spec.; Karangbolong, near Petruk Cave , agroforestry; 7°42′18″ S, 109°24′05″ E; 138 m a.s.l.; MZB 19274 GoogleMaps • 1 spec.; same data as for preceding; ZMH 133407 View Materials GoogleMaps • 23 spec.; Karangbolong, Adiraja Hill , agroforestry; 7°42′48″ S, 109°24′05″ E; 168 m a.s.l.; MZB 19271 GoogleMaps • 4 spec.; Karangbolong, Adiraja Hill , teak plantation; 7°42′50″ S, 109°24′05″ E; 166 m a.s.l.; MZB 19275 GoogleMaps • 3 spec.; same data as for preceding; ZMH 133414 View Materials GoogleMaps .

Description

SHELL (Fig. 50; Tables 3–4 View Table 3 View Table 4 ). Depressed conical, with 4.75–5.5 hardly convex whorls; protoconch almost smooth; teleoconch with irregular wrinkles, apical side with indistinct incised spiral lines, umbilical side with more distinct spiral lines; scaly processes all over teleoconch; tuberculate around umbilicus; brownish-corneous; body whorl sharply keeled; aperture oval; upper insertion of peristome slightly descending; peristome expanded, reflexed and slightly thickened; umbilicus slightly eccentric, wide, comprising 24–37% of shell diameter, hardly obscured by columellar edge.

GENITALIA ( Figs 19 View Figs 15–24 , 33 View Figs 29–47 ; Table 4 View Table 4 ). Atrium short; penis divided by a narrowing into a long, broad cylindrical distal part and a slightly dilated proximal part, without penis coecum; membranaceous sheath around distal part of penis connected with proximal part of epiphallus by tissue; flagellum moderately long, broadest near its proximal end, where it rapidly tapers, slightly crenated, without node; vas deferens narrow and long; vagina short, distally dilated; oviduct longer, proximally hardly tapering; peduncle of bursa copulatrix subdivided into a broader, cylindrical distal part and a narrower, longer proximal part. Right ommatophoral retractor runs between penis and vagina.

Remarks

With regard to the presence of scales all over the teleoconch, L. petrukensis sp. nov. resembles L. tholiformis sp. nov. (Fig. 51) and L. madurensis sp. nov. (Fig. 57). It differs from both species in the smaller (D 8.1–9.8 mm vs 13.0– 14.4 mm in L. tholiformis sp. nov. and 11.4–12.0 mm in L. madurensis sp. nov.), more depressed shell (D/H 1.49–1.79 vs 1.77–1.88 in L. tholiformis sp. nov. and 1.75–2.11 in L. madurensis sp. nov.) with fewer whorls (4.75–5.5 vs 6–6.25 in L. tholiformis sp. nov. and 5.5–5.75 in L. madurensis sp. nov.), an on average narrower umbilicus (U/D 0.24–0.37 vs 0.32–0.40 in L. tholiformis sp. nov. and 0.38–0.40 in L. madurensis sp. nov.) and in the penis that is divided by a constriction into a long, broad, cylindrical distal part and a slightly dilated proximal part.

We could only investigate the anatomy of the holotype, from Karangbolong in southern Central Java (MZB 19203). There are several samples from other regions of Central Java, West Java and Banten with similar shells. Thus, it is possible that this species is more widely distributed, but the identity of the samples from other regions must be confirmed anatomically.

Distribution

Landouria petrukensis sp. nov. is known from Karangbolong in southern Central Java (Fig. 52).

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.