Landouria sukoliloensis sp. nov.

urn:lsid:zoobank.org:act: 74853E9E-ECA0-4182-8CB2-FD09A4CD903C

Figs 24, 38, 53, 59; Tables 3–4

Landouria winteriana – Nurinsiyah 2015: 32 . (not Pfeiffer, 1842)

Diagnosis

Landouria sukoliloensis sp. nov. is characterized by a brownish-corneous, sharply keeled shell, a penis that is dilated at its proximal end and a flagellum that is not crenated, but abruptly tapering at its proximal end.

Etymology

Landouria sukoliloensis sp. nov. is named after its occurrence in the Sukolilo Karst.

Material examined

Holotype

INDONESIA • holotype (det. anat.); Central Java, Pati, Kayen, near Watu Payung; 6°55′59″ S, 110°55′34″ E; 110 m a.s.l.; 16 Aug. 2014; A.S. Nurinsiyah, F.L.H. Irsyad, F.J. Sari and E. Nurlaela leg.; D = 11.7 mm, H = 6.1 mm; MZB 19219.

Paratypes

INDONESIA – Central Java • 7 spec. (det. anat.); Grobogan, Taruman Village, near Sendang Sedayu, agroforestry; 7°00′52″ S, 110°51′29″ E; 20 m a.s.l.; MZB 19221 • 1 spec.; same data as for preceding; ZMH 133432 • 5 spec.; Grobogan, Taruman Village, near Sendang Sedayu, agroforestry; 7°00′52″ S, 110°51′29″ E; 23 m a.s.l.; MZB 19216 • 2 spec.; same data as for preceding; ZMH 133435 • 13 spec.; same data as for holotype; MZB 19218 • 9 spec.; same data as for holotype; ZMH 133433 • 10 spec.; Pati, Kayen, near Watu Payung; 6°56′00″ S, 110°55′34″ E; 115 m a.s.l.; MZB 19225 • 4 spec.; same data as for preceding; ZMH 133429 • 21 spec. (det. anat.); Pati, Sukolilo, Kedumulyo, Wareh Cave, agroforestry; 6°55′41″ S, 110°57′37″ E; 73 m a.s.l.; MZB 192229 • 15 spec.; same data as for preceding; ZMH 133431 • 7 spec.; Pati, Sukolilo, Kedumulyo, Wareh Cave, agroforestry; 6°55′41″ S, 110°57′38″ E; 53 m a.s.l.; MZB 19223 • 4 spec.; same data as for preceding; ZMH 133430 .

Other material

INDONESIA – Central Java • 3 spec.; Grobogan, Sedayu, surroundings of Macan Cave, agroforestry and shrubs; 6°58′30″ S, 110°57′03″ E; 363 m a.s.l.; MZB 19252 • 3 spec.; Pati, Kayen, Brati, Nggoboyo Spring, agroforestry; 6°54′58″ S, 111°01′54″ E; 89 m a.s.l.; MZB 19232 • 3 spec.; Pati, Tambakromo, Larangan, Lanang Spring, secondary forest; 6°54′19″ S, 111°03′22″ E; 100 m a.s.l.; MZB 19226 • 2 spec.; Pati, Tambakromo, Larangan, Lowo Cave, secondary forest; 6°54′19″ S, 111°03′24″ E; 112 m a.s.l.; MZB 19230 • 1 spec.; Pati, Tambakromo, Kedunglawah, Ngencek Spring, agroforestry; 6°54′05″ S, 111°03′57″ E; 110 m a.s.l.; MZB 19262 .

Description

SHELL (Fig. 59; Tables 3–4). Depressed conical, with 5–5.75 hardly convex whorls; protoconch almost smooth; teleoconch with fine, irregular wrinkles, 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 rounded rhombic; upper insertion of peristome slightly descending; peristome expanded, slightly reflexed and thickened; umbilicus slightly eccentric, wide, comprising 22–41% of shell diameter, hardly obscured by columellar edge.

GENITALIA (Figs 24, 38; Table 4). Atrium short; penis long, cylindrical, 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 almost cylindrical epiphallus; flagellum moderately long, broadest in its middle part, abruptly tapering at its proximal end, not crenated, without node; vas deferens narrow and long; vagina long, often constricted near atrium; oviduct short, broad, proximally tapering; peduncle of bursa copulatrix subdivided into a broader 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

Landouria sukoliloensis sp. nov. cannot be distinguished from L. sewuensis sp. nov. and L. intumescens by shell characters. It differs from these species in the penis that is dilated at its proximal end and in the flagellum, which is not crenulated but abruptly tapers at its proximal end.

Landouria sukoliloensis sp. nov. differs from L. tonywhitteni sp. nov. (Fig. 60), with which it occurs sympatrically, in the smaller (D 10.4–12.3 mm vs 14.3–17.6 mm in L. tonywhitteni sp. nov.), higher shell (D/H 1.60–1.93 vs 1.93–2.34 in L. tonywhitteni sp. nov.), the dilatation at the proximal end of the penis and the lack of a globular node at the flagellum.

Distribution

Landouria sukoliloensis sp. nov. is endemic to Sukolilo Karst (Fig. 53).