Nelcyndana borneensis Duffels

Duffels, Joannes Petrus, 2010, The genus Nelcyndana Stal (Hemiptera, Cicadidae, Taphurini) with description of three new species from Borneo, ZooKeys 61, pp. 11-31 : 16-20

Nelcyndana borneensis Duffels sp. n. Figs 357

Type material.

24♂ 23♀. Holotype ♂: Malaysia: Sabah: "RMNH Leiden E SABAH / Lahad Datu, 60 km W of: / Danum Valley Field Centre / at junction Sg Segama and / Sg Palum Tambun, 150 m / 4°58"N 117°48'E", "At light. Bridge of Segama. / 19 Mar 1987, 18.30-21.30. / Clearing, edge of untouched / evergr. lowl. rainforest / leg. Van Tol & Huisman" (RMNH). Paratypes: Malaysia: Sabah: same data as holotype, 3♀ (RMNH), same data as holotype but: 17 & 18.iii.1987, 18.30-21.00, 1♂ 2♀ (RMNH), 20.iii.1987, 18.20-21.00, 1♂ 2♀ (RMNH), clearing nr E trail, 21.ii.1987, 18.30-20.30, 1♀ (RMNH); 60 km W Lahad Datu, DVFC, nr Segama bridge, 4°58'N 117°43'E, 20.x.1987, 150 m, J. Huisman & R. de Jong, 1♂ (RMNH); 60 km W of Lahad Datu, road Kg Silam - DVFC, km 68.5, 4°58'N 117°48'E, 150 m, 24.iii.1987, ML-light, J. Huisman, 1♂ (RMNH); Danum Valley, 5°01'N 117°47'E, 10.ix.1987, 100 m, A.H. Kirk-Spriggs, nmw Sabah (Borneo) Expedition, nmw. z 1987, 094, light trap sample roadside, secondary forest, 2♂ (NMWC), same data but: 11.ix.1987, 1♂ 2♀ (nmwc), 14.x.1987, 1♀ (NMWC); Danum Valley, 5°01'N 117°47'E, 30.ix.1987, 200 m, A.H. Kirk-Spriggs, nmw Sabah (Borneo) Expedition, nmw., z 1987, 094, lowland mixed dipterocarp forest, Grid EZ, light trap sample, understory forest, 1♂ 2♀ (nmwc); Danum Valley, 70 km W Lahad Datu, Field Centre, Main Trail West 0 North 5, 150 m, 15.xii.1989, sample Sab. 69, secondary vegetation/canopy/primary forest margin, at light, M.J. & J.P. Duffels, 1♂ (ZMAN); Bettotan, nr. Sandakan, 17.viii.1927, C.B.K. & H.M.P. F.M.S. Museums, ex. F.M.S. Museum, B.M. 1955-354, 1♂ (BMNH), same data but 24.vii.1927, 1♂ (BMNH); Sungai Darling, 60 m W Sandakan, 26.xi.1989, sample Sab. 43, secondary forest understorey, at light, M.J. & J.P. Duffels, 1♀ (ZMAN). Sarawak: Foot of Mt. Dullit, junction of rivers Tinjar & Lejok, 25.viii.1932, Light trap, Oxford Univ. Exp. B.M. Hobby & A.W. Moore B.M. 1933-254, 2♂ 3♀ (BMNH), same data but 28.viii.1932, 1♀ (BMNH), 31.viii.1932, 1♂ 1♀ (BMNH), 6.x.1932, 1♂ (BMNH); Gunung Mulu Nat. Park, Site 7, Long Pala (Base), 324450, 50 m, Alluvial/secondary forest, Acl-understorey, J.D. Holloway, RGS Mulu exped., B.M. 1978-206, 4♂ 4♀ (BMNH). Brunei: Temburong District, ridge NE of Kuala Belalong, approx. 300 m, x.1992, J.H. Martin, 125 W mv light, B.M. 1992-172, 3♂ (BMNH), same data but: xi.1992, 1♂ (BMNH).

Etymology.

This species name refers to its distribution in Borneo.

Description.

Ground colour yellowish to greenish brown, and reddish brown. Marking black or black variegated with reddish brown. Dorsal side of body silvery pilose, ventral side with longer silvery setae.

Male.

Head (Fig. 3). Vertex black, with exception of a yellow area adjacent to supra-antennal plate and a yellow median triangle against posterior margin of head; in a few specimens the yellow colouration is more extended, leaving only the lateroproximal parts of the vertex black. Postclypeus protruding fairly strongly, black or black variegated with reddish brown, but anteriorly with greenish, glabrous nose, ventrally sometimes with reddish brown oblong marking from nose towards clypeal suture; anterior and ventral parts with 6 pairs of distinct, black transverse ridges, lateral margins of ventral part yellowish brown. Anteclypeus black, often with either basal triangle on medial keel or whole keel reddish brown. Rostrum brown with dark brown apical part reaching beyond anterior margin of hind coxae. Lorum and lateroproximal part of gena black. Antennae, supra-antennal plate and vertex lobe yellowish brown.

Thorax. Pronotum (Fig. 3). A pair of large, rounded rectangular, black markings, sometimes slightly variegated with reddish brown, is enclosed by a narrow, yellowish to greenish fascia along anterior pronotal margin, the pronotum collar of the same co lour, and a broad median fascia of the same colour that strongly widens to the anterior margin of the pronotum and to the pronotum collar.

Mesonotum (Fig. 3) with a pair of paramedian, black, obconical spots at anterior margin, reaching to one fifth to one third of mesonotum disk; spots either juxtaposed or fused at base. Scutal depressions in front of cruciform elevation covered by often fairly large round, black spots. Lateral sigillae black, anteriorly 1.5 times as broad as anterior part of paramedian obconical spots, narrow a little abruptly at one fourth of its length from base and then gradually narrow to their distal ends. Cruciform elevation yellowish.

Legs. Yellow-brown, fore and middle tarsi and distal part of fore tibia often darker brown. Fore femora with four yellow-brown spines with dark brown apical parts: a long, erect spine at proximal end of lower ridge of femur, a second spine, two-thirds as long as proximal spine, at three-fifths of lower ridge, a third, slightly shorter, spine, at four-fifths of lower ridge and a very short, triangular spine near distal end of lower ridge.

Tegmina and wings. Hyaline. Venation of tegmina and wings yellowish to reddish brown.

Operculum (Fig. 5). Sickle-shaped with rounded apex reaching to either two-thirds or three-fourths of timbal cavity or to almost anterior margin of abdominal segment 2, strongly narrowed from base to one fourth of its length, about equally wide in apical three fourths. Surface of operculum with short to fairly long, adjacent setae and apical one third with very long setae especially along margins of operculum.

Abdomen (Figs 3, 5). Timbal with 6 somewhat irregular evenly spaced long ribs and very faint intercalary ribs. Tergite 1 black or black-brown, tergite 2 black with a pair of paramedian yellow-brown spots at posterior margin, tergites 3-8 with a laterally widening, black fascia along anterior margin medially reaching to one third or two thirds of segment length, a laterally narrowing reddish brown fascia at about half-length of tergite and a laterally narrowing yellowish green fascia along posterior margin. Sternite 2 brownish black, sternites 3 to 7 black to black-brown but sternites 3 to 6 yellowish along posterior margin, sternite 8 castaneous.

Genitalia (Fig. 6). Pygofer with more or less parallel lateral sides. Dorsal beak fairly long, slightly upcurved, yellowish brown, with black apex. Basal pygofer lobe very long, straight and narrow, apically outcurved and reaching about apex of anal segment. Upper pygofer lobes in ventral view hidden behind the basal lobes adjacent to basal pygofer lobe, narrowly rounded apically and about one fifth as long as apical part of basal lobe measured from base of upper pygofer lobe to its apex.Dorsal beak in dorsal view about an equilateral triangle with nipple-shapedapex. Clasper with basal two thirds about oval, and apical one third with a quadrangular median angle and an apically rounded lateral flap with a short spine at ventral margin. Theca chitinized, apically with a pair of long and slender, apically acute and curved, appendages. Aedeagal basal plates in ventral view triangular with strongly elongated anterior angles.

Female.

Head as in male, but postclypeus reddish brown from nose to anterior margin of pronotum; vertex reddish brown with exception of the black lateroproximal parts that more or less enclose the paired ocelli; a black spot is attached to proximal side of median ocellus.

Thorax. Pronotum. Rectangular markings as described for males are not black but reddish brown with broad black marking in the oblique fissures and narrow black marking in lateral part of ambient fissure. Mesonotum as in males.

Legs, tegmina and wings as in males.

Operculum. Basal half broad, narrowed at half its length to two thirds of basal width; apical part curved mediad, medial margin weakly concave, and lateral margin convex to narrowly rounded apex, reaching to anterior margin or one third of sternite 2.

Abdomen. Tergites 2-7 with a laterally widening, black fascia along anterior margin medially reaching to one third or two thirds of segment length, a laterally narrowing, reddish brown fascia at about half-length of tergite and a laterally narrowing yellowish, green fascia along posterior margin. Tergite 8 with narrow black fascia and broader reddish brown and yellowish fasciae. Sternite 2 medially black-brown, sternites 3 to 6 with brown-black transverse band, which is one third to half as wide as sternite and reaches from anterior sternite margin to two-thirds of sternite or at most almost to its posterior margin. Segment 9 with a pair of oblong, paramedian, brown to black-brown markings and a pair of round, lateral, brown spots and brownish colouration along basal two-thirds of lower margin.

Measurements

(in mm; 6♂, 6♀). Body length ♂: 8.1-9.2 ♀: 9.0-10.3; tegmen length ♂: 8.7-10.2, ♀: 10.0-11.8; head width ♂: 2.8-3.2, ♀: 2.9-3.7; pronotum width ♂: 2.5-2.9, ♀: 2.8-3.4.

Distribution

(Fig. 7). Nelcyndana borneensis is known from various places in Borneo (Sarawak, Sabah, Kalimantan and Brunei) and is probably a Borneo endemic.