Landouria pacitanensis, 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 : 48-50

publication ID	https://doi.org/ 10.5852/ejt.2019.526
publication LSID	lsid:zoobank.org:pub:3FFC527D-E9CA-4D9F-BF59-076FA60171AC
persistent identifier	https://treatment.plazi.org/id/E0076893-CF05-4D23-A1E0-402A2DE7F0EF
taxon LSID	lsid:zoobank.org:act:E0076893-CF05-4D23-A1E0-402A2DE7F0EF
treatment provided by	Plazi
scientific name	Landouria pacitanensis
status	sp. nov.

Treatment

Landouria pacitanensis View in CoL sp. nov.

urn:lsid:zoobank.org:act:E0076893-CF05-4D23-A1E0-402A2DE7F0EF

Figs 9 View Figs 6–11 , 41 View Figs 29–47 , 53 View Figs 52–55 , 62 View Figs 60–62 , 65 View Figs 63–71 ; Tables 3–4 View Table 3 View Table 4

Diagnosis

Landouria pacitanensis sp. nov. is characterized by a strongly depressed conical, brownish-corneous, sharply keeled shell and a penis with a distinct constriction between its distal and its proximal part, and the presence of a coecum at the proximal end of the penis.

Etymology

Landouria pacitanensis sp. nov. is named after its occurrence in the Pacitan Regency.

Material examined

Holotype

INDONESIA • holotype (det. anat.); East Java, Pacitan, Srau Beach ; 8°15′01″ S, 110°59′46″ E; 60 m a.s.l.; 10 Aug. 2014; A.S. Nurinsiyah, F.L.H. Irsyad, F.J. Sari and E. Nurlaela leg.; measurements: D = 12.7 mm, H = 7.1 mm; MZB 21191. GoogleMaps

Paratypes

INDONESIA – East Java • 7 spec.; Pacitan, Srau Beach ; 8°14′58″ S, 110°59′42″ E; 78 m a.s.l.; MZB 19304 GoogleMaps • 4 spec.; same data as for preceding; ZMH 148511 View Materials GoogleMaps • 6 spec.; same data as for holotype; MZB 19234 GoogleMaps • 11 spec.; same data as for holotype; MZB 21270 GoogleMaps • 4 spec.; same data as for holotype; ZMH 148510 View Materials GoogleMaps • 6 spec.; same data as for holotype; ZMH 148513 View Materials GoogleMaps .

Other material

INDONESIA – East Java • 1 spec. (det.anat.); Pacitan, near Srau Beach ; 8°13′55″ S, 111°00′54″ E; 217 m a.s.l.; MZB 21267 GoogleMaps • 11 spec.; same data as for preceding; MZB 19231 GoogleMaps • 5 spec.; same data as for preceding; ZMH 148509 View Materials GoogleMaps • 4 spec.; same data as for preceding; ZMH 148512 View Materials GoogleMaps • 7 spec.; Pacitan, near Srau Beach ; 8°13′54″ S, 111°00′55″ E; 223 m a.s.l.; MZB 21192 GoogleMaps • 5 spec.; same data as for preceding; ZMH 148507 View Materials GoogleMaps .

Description

SHELL ( Figs 9 View Figs 6–11 , 62 View Figs 60–62 ; Tables 3–4 View Table 3 View Table 4 ). Depressed conical, with 5.25–6 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 sparse, mainly at periphery; tuberculate around umbilicus; brownish-corneous; body whorl sharply keeled; aperture almost circular; upper insertion of peristome descending; peristome expanded, reflexed and slightly thickened; umbilicus hardly eccentric, wide, comprising 28–34% of shell diameter, hardly obscured by columellar edge.

GENITALIA ( Figs 41 View Figs 29–47 , 65 View Figs 63–71 ; Table 4 View Table 4 ). Atrium short; penis long, consisting of a long, cylindrical and very muscular distal part covered by an additional sheath, which is connected by muscular tissue to proximal part of epiphallus, and a dilated proximal part; distal and proximal parts of penis separated by a narrow constriction; penial papilla indistinct; inside proximal part of penis with longitudinal pilasters, which pass into a more complex sculpture in distal part of penis; at proximal end of penis with a blunt penis coecum; penial retractor runs from diaphragm to proximal part of epiphallus, which tapers proximally; flagellum moderately long, broadest in its middle part, without node, gradually tapering towards its proximal end; vas deferens narrow and long; vagina long; peduncle of bursa copulatrix subdivided into a broader, cylindrical distal part and a narrower, longer proximal part.

Remarks

Landouria nodifera sp. nov., L. tonywhitteni sp. nov., L. pacitanensis sp. nov., L. sukoliloensis sp. nov., L. sewuensis sp. nov. and L. intumescens share strongly depressed, brownish-corneous, sharply keeled shells. These species cannot be reliably distinguished by shell characters. Landouria pacitanensis sp. nov. shares a coecum at the proximal end of the penis with L. nodifera sp. nov., from which it differs in the long and very muscular distal part of the penis, which is separated from the proximal part of the penis by a very narrow constriction, the insertion of the penial retractor close to the distal end of the epiphallus and the lack of a node at the base of the flagellum.

The populations from the surroundings of Srau Beach differ in shell size and shape. The populations closer to the beach are smaller (D 10.6–12.7 mm vs 13.7–14.7 mm) and more elevated (D/H 1.57–1.83 vs 1.70–2.18) than those from further inland.

Distribution

Landouria pacitanensis sp. nov. is endemic to the Pacitan Regency in East Java (Fig. 53).

References

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.