Landouria intumescens ( Martens, 1867 ) 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 : 51-53

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.11238085
persistent identifier	https://treatment.plazi.org/id/03B1DB4C-8B1F-4E2D-4FD1-FEF7381EFBD7
treatment provided by	Plazi
scientific name	Landouria intumescens ( Martens, 1867 )
status	comb. nov.

Treatment

Landouria intumescens ( Martens, 1867) View in CoL comb. nov.

Figs 42 View Figs 29–47 , 53 View Figs 52–55 , 66 View Figs 63–71 , 72–74 View Figs 72–75 ; Tables 3–4 View Table 3 View Table 4

Helix intumescens Martens, 1867: 263 View in CoL , pl. 13, fig. 10 (“bei Surabaya und dem benachbarten Grisse … im Tengergebirge bei Wonosari”) (in part?).

Landouria winteriana – van Benthem Jutting 1950: 463 View in CoL (in part). (not Pfeiffer, 1842)

Diagnosis

Landouria intumescens is characterized by a medium-sized, brownish-corneous, depressed conical, sharply keeled shell and a penis that is divided by a constriction into a long distal and a short proximal section and a flagellum with a broad, crenated distal part and a short and narrow proximal part.

Material examined

Lectotype

INDONESIA • lectotype (here designated); East Java, Surabaya ; 7°20′ S, 112°45′ E; E. von Martens leg.; measurements: D = 13.4 mm, H = 8.2 mm; ZMB 5160 View Materials a.

GoogleMaps

Paralectotypes

INDONESIA • 7 spec.; same data as for lectotype; ZMB 5160 View Materials .

GoogleMaps

Other material

INDONESIA – East Java • 2 spec. (det. anat.); Tuban, Montong, Guwoterus , teak and agroforestry; 6°57′56″ S, 111°47′56″ E; 122 m a.s.l.; MZB 19208 GoogleMaps • 11 spec. (det. anat.); Tuban, Montong, Guwoterus , sumber Krawak , secondary forest; 6°57′50″ S, 111°48′20″ E; 147 m a.s.l.; MZB 19206 GoogleMaps • 1 spec.; same data as for preceding; MZB 19207 GoogleMaps • 8 spec.; same data as for preceding; ZMH 133438 View Materials GoogleMaps • 20 spec.; Bojonegoro, Dander, Sumberarum , mouth of Lawa Cave ; 7°16′30″ S, 111°51′09″ E; 117 m a.s.l.; MZB 19284 GoogleMaps • 10 spec.; same data as for preceding; ZMH 1334110 View Materials GoogleMaps • 1 spec.; Bojonegoro, Dander, Sumberarum , mouth of Sumur Cave ; 7°16′08″ S, 111°51′41″ E; 72 m a.s.l.; MZB 19263 GoogleMaps • 4 spec.; same data as for preceding; MZB 19316 GoogleMaps • 8 spec.; same data as for preceding; ZMH 133415 View Materials GoogleMaps .

Description

SHELL ( Figs 72–74 View Figs 72–75 ; Tables 3–4 View Table 3 View Table 4 ). Depressed conical, with 5–5.75 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; without scaly processes; tuberculate around umbilicus; brownish-corneous, some with a light brownish band at periphery; body whorl sharply keeled; aperture rounded rhombic; upper insertion of peristome slightly descending; peristome expanded, reflexed and slightly thickened; umbilicus slightly eccentric, wide, comprising 22–34% of shell diameter, hardly obscured by columellar edge.

GENITALIA ( Figs 42 View Figs 29–47 , 66 View Figs 63–71 ; Table 4 View Table 4 ). Atrium short; penis long, distal part cylindrical, broad, tapering proximally, separated from proximal part by a constriction before bend in penis, proximal part slightly dilated at its 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 part of short, cylindrical epiphallus; flagellum moderately long, broadest near its distal end, slightly crenated, without node, proximal part narrow, almost cylindrical; vas deferens narrow and long; vagina long, distally broad, proximally narrow; oviduct shorter, 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

Martens (1867: 263, pl. 13, fig. 10) proposed the name H. intumescens for a medium-sized morph from Surabaya, which he figured, but also included a smaller morph from Wonosari in the Tengger Mountains in the nominal taxon. To fix the name for the morph from Surabaya, we designate the specimen figured by Martens (1867: pl. 13, fig. 10; see Fig. 72 View Figs 72–75 ) as the lectotype.

We examined specimens from Tuban Regency anatomically; they agree in shell characters with the morph from Surabaya. The specific identity of these specimens with L. intumescens must be proven by an anatomical examination of specimens from Surabaya.

Whether the smaller paralectotypes of H. intumescens from Wonosari in the Tengger Mountains (ZMB 230704; Fig. 74 View Figs 72–75 ) are conspecific with L. intumescens must also be proven by an anatomical examination.

Landouria intumescens cannot be reliably distinguished from L. winteriana by shell characters. However, the shells of L. intumescens usually differ from those of L. winteriana in the larger diameter (11.6– 14.1 mm vs 9.7–12.6 mm in L. winteriana ) and in the relatively narrower umbilicus, which comprises 22–34% of the shell diameter in L. intumescens vs 29–51% in L. winteriana . Landouria intumescens also differs from L. winteriana in the penis, which becomes narrow towards its proximal end, whereas it ends proximally in a globular dilatation in L. winteriana ( Fig. 15 View Figs 15–24 ).

Distribution

Landouria intumescens is known only from northern 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.