Elimaea (Schizelimaea) singgalang, Ingrisch, Sigfrid, 2011

Ingrisch, Sigfrid, 2011, New taxa of Elimaeini (Orthoptera: Tettigoniidae: Phaneropterinae) from South East Asia, Zootaxa 2935, pp. 1-25 : 8-9

Elimaea (Schizelimaea) singgalang sp. n.

Figs. 9A–K

Holotype (male): Indonesia: West Sumatra, Zufluss des Singgalang [0°28'S, 100°22'E], kleines Dorf, Eisenbahn- und Autobrücke verlaufen dort parallel, ca 12 km nach dem Wasserfall von Lembah Anei und 3 km von Padang Panjang (Taglang), 13.ix.1991, leg. Wolfram Guidetti, depository: Institut und Museum für Regenwaldökologie Leipzig ( IMRL).

Diagnosis. The new species shares with Elimaea (Schizelimaea) caricifolia (De Haan, 1842) from Borneo, Elimaea (Rhaebelimaea) filicauda Hebard, 1922 and Elimaea (Rhaebelimaea) bakeri Hebard, 1922 , both from the Philippines, the long and filiform lobes of the male subgenital plate, with E. caricifolia also the widening of the male tegmen especially in basal half of costal area (compare Figs. 9A–B with 9L–M). It differs from the latter by the shape of the stridulatory area of the male tegmen with the medially projecting angle being obtuse but nearly rectangular in E. caricifolia and by the shape and course of the stridulatory and other veins. From E. filicauda it differs by the widened tegmen, shape of stridulatory area, apical area of male cerci and shorter lobes of the male subgenital plate. From E. bakeri it differs by longer and more strongly curved cerci with different apical tooth, the roughly triangular epiproct, and less curved apical lobes of the subgenital plate. The stridulatory file and phallic sclerites of E. caricifolia , E. filicauda and E. bakeri are not known but probably also differ from the shape in the new species.

Description. Fastigium verticis only at base with a short furrow; angularly separated from fastigium frontis. Pronotum disc flattened with lateral angles rounded; apical margin rounded; paranota little longer than high; humeral sinus present. Tegmen wide; anterior margin convex, posterior margin little sinuate; apex obliquely truncate. Hind wings projecting. Anterior coxa with short spine. Mid and hind femora with numerous spinules on externo-ventral margins, anterior femur on both ventral margins. Anterior tibia phasmid-like curved; tibial tympana conchate on both sides but tympana covered only half.

Male. Stridulatory area moderately wide with angular internal margin; stridulatory vein straight ( Figs. 9A–B ). Stridulatory file on underside of left tegmen convex, little sinuate, 2.53 mm long; teeth moderately large, narrowing in apical third, gradually standing narrower towards apex; with 57 teeth, equating 23 teeth per mm; in basal half 1.4, in apical half with 3.4 teeth per 0.1 mm ( Fig. 9C ). Mirror on right tegmen nearly quadrate with rounded angles; on internal side with strong, half-moon shaped swelling, 1.78 mm long, 1.78 mm wide; index length: width 1.00 ( Fig. 9B ). Tenth abdominal tergite with fine furrow in midline; apical margin subtruncate ( Fig. 9D ). Epiproct conical with rounded apex ( Fig. 9E ). Cerci curved, apex with compressed tooth with subacute tip ( Fig. 9G ). Subgenital plate split to base into two compressed, at base conical, afterwards filiform, upcurved lobes [left lobe broken in specimen at hand, glued to cardboard] ( Fig. 9F ). Phallus with a pair of sclerotised plates; dorsal marginal area brown with scaly surface, margin with numerous small and some larger denticles ( Figs. 9I –J ).

Coloration. Green ( Fig. 9K ). Vertex with narrow dark postocular bands. Pronotum with dark lateral bands composed of dots. Tegmen with little conspicuous black dots; stridulatory area black.

Measurements (1 male). Body w/wings: 53; body w/o wings: 25; pronotum: 5.2; tegmen: 42; tegmen width: 10; hind femur: 27.5 mm.

Etymology. Named after the type locality; noun in apposition.

Figures

FIGURE 9. A – K, Elimaea (Schizelimaea) singgalang sp. n. holotype male; L – M, E. (R.) caricifolia (De Haan, 1842) holotype male. A – B, L – M, stridulatory area of left (A, L) and right tegmen (B, M); C, stridulatory file on underside of left tegmen; D, abdominal apex in dorsal view (left apical lobe of subgenital plate broken); E, do. in apical view with epiproct; F, do. in lateral view; G, apex of left cercus in roughly proximal view; H, same in strict dorsal view; I, phallic sclerites in lateral view; J, same in dorsal view; K, habitus in dorsal view. Scales = 1 mm except K. Abbreviations: 10 t, tenth abdominal tergite; c, cercus; e, epiproct; sg, subgenital plate.