Jambiliara macroptera Ingrisch, 1998

Ingrisch, Sigfrid & Tan, Ming Kai, 2012, New Taxa Of Agraeciini (Orthoptera: Tettigoniidae: Conocephalinae) From Singapore And Malaysia With A Review Of The Genus Jambiliara, Raffles Bulletin of Zoology 60 (1), pp. 137-155 : 145-146

Jambiliara macroptera Ingrisch, 1998

Figs. 6B–D , 7A,B , 8A , 9A B , 10A,B , 11A,B

Jambiliara macroptera Ingrisch, 1998: 56 .

Material examined. — Holotype: female ( MBBJ), Indonesia: Sumatra, Djambi exp., Gunung Mongko, coll. O. Posthumus, 7 Aug.1925 . Other specimens: Indonesia: 1 male (Coll. F. Willemse

in RMNH), North Sumatra, Bivonae One, Mt. Bandahara , no. 23, lowland evergreen multistratal forest at light, elev. 810 m (3°43'N, 97°41'E), coll. J. Krikken, 25 Jun. – 5 Jul.1972 .

Remarks. — The female holotype was collected during the palaeobotanical expedition of Oene Posthumus, which was to the vicinity of Bangko [2°06'S, 102°13'E] ( van Waveren et al., 2007; Flora Malesiana Online, 2011). The male is described here for the first time. The male at hand comes from a lowland forest in North Sumatra. Thus it is not completely certain, if it really belongs to J. macroptera or to another undescribed taxon. Due to the weak differences between the species in Jambiliara , we have to wait until a male of J. macroptera from the type locality becomes known to settle the question.

Diagnosis. — J. macroptera differs from the other taxa of the genus by the combination of male cerci with apex rounded, the male subgenital plate at base of apical projections with a faint angle only but with distinct styli, the titillators in apicodorsal view with the serrulation at dorsal margin not reaching the apical widening of the dorsal process, and the teeth of the stridulatory file on the underside of the left tegmen with 58 teeth per mm being rather dense. The female subgenital plate has the apex faintly excised.

Description. — As genus. Fastigium verticis conical with weak dorsal furrow; apex obtuse, nearly truncate. Pronotum with anterior and posterior margins rounded; with fold behind first transverse sulcus; posterior area distinctly elevated, widened, shouldered and with medial carinula; humeral sinus distinct but not strong. Mesosternal lobes conical, acute. Femora with the following number of spines on ventral margins: profemur 1–2 external, 2–3 internal; mesofemur 2–4 external, 0–1 internal; postfemur 8–9 external, 5–6 internal.

Male: Stridulatory area of left tegmen as in Fig. 7A, B . Stridulatory file on underside of left tegmen regularly curved with densely arranged teeth; 3.0 mm long, with 173 teeth, equating 58 teeth per mm; in middle of file with 41 teeth per mm ( Fig. 8A ). Mirror on right tegmen 2.17 mm long, 1.88 mm wide; index length to width 1.15 ( Fig. 7B ). Tenth abdominal tergite with dorsal area very little prolonged, surface nearly flat with shallow and wide medial furrow; apical margin in middle excised with truncate bottom and spinose projection of both sides of excision ( Fig. 9A, B ). Epiproct rounded; dorsal surface grooved; margins with irregular carinae. Paraproctes with tuberculate projection. Cerci short cylindrical, curved; apex broadly rounded with short stylate pre-apical internal tooth; before tooth, on ventro-internal margin, with a long, compressed, curved projection pointing interno-ventrad, at tip with proximal angle obtuse, distal angle little prolonged into acute cone. Subgenital plate longer than wide; mainly in lateral areas setose; triangularly excised from base; in ventral view basal half wider than apical half; about apical third curved dorsad in a 90°-angle or little more, not visible from below; upcurved area in apical view wide-roundedly excised, margin very little constricted at base of compressed projections; projections with concave internal surface; styli inserted at internal surface of projections, rather well developed, surpassing margins of projection ( Fig. 9A, B ). Titillators fused in middle; basal parts deviating, with little diverging margins to base; very base with irregular margin; apical parts divided from fused central area into a pair of plates supporting the membranous phallus lobes and a subfused dorsal process; apical part of process widened, thickened and standing vertically to the plates; apical margin of apical plates granulated with granules not reaching terminal structure of process ( Fig. 10A, B ). Membranous part of phallus near titillator apex densely setose.

Female: Subgenital plate transverse, broader than long, apical angles rounded and slightly concave in between ( Fig. 11A, B ).

Colouration: Brown. Frons and genae medium brown with light spots; ventral area of genae, clypeus and labrum yellowish brown; mandibles with internal and apical areas black; ventro-lateral areas of scapus and pedicellus dark brown or black, flagellum indistinctly annulated. Pronotum medium brown including light spots; with narrow irregular black lateral bands; medial of lateral bands and along ventral margin with whitish brown bands. Abdominal tergites red with blackish brown lateral areas; intersegmental membranes of abdomen black including light spots. Tegmen maculated. Hind wings infumated; in the male at hand less so than in the female type. Legs indistinctly maculated; ventral area of hind femur green.

Measurements (1 male, 1 female): Body with wings: male 35, female 41; body without wings: male 26, female 25; pronotum: male 8.7, female 8.5; tegmen: male 27, female 33; hind femur: male 20.5, female 24; ovipositor: female 23; ovipositor height: female 2.6; antenna: male 110 mm.

Figures

Fig. 6. Jambiliara species: A–C, E–G, habitus with spread wings in dorsal view; D, I, face; H, habitus in lateral view. – A, J. angula n. sp. male holotype; B–D, J. macroptera Ingrisch, 1998 (B, male from Mt. Bandahara; C, D, female holotype); E–G, J. selita n. sp. (E, male holotype; F, male paratype; G, female paratype from Perak); H, I, J. moultonii (Karny, 1923) female holotype. The arrow points at the antennal scrobus. Scale bars = 10 mm. (Photographs by: S. Ingrisch [A–I except F] and M. K. Tan [F]).

Fig. 7. Male stridulatory area of left (A, C, E) and right (B, D, F) tegmen of Jambiliara species: A, B, J. macroptera Ingrisch, 1998 from Mt. Bandahara; C, D, J. selita n. sp. holotype; E, F, J. angula n. sp. holotype. (Photographs by: S. Ingrisch).

Fig. 8. Male stridulatory file on underside of left tegmen of Jambiliara species: A, J. macroptera Ingrisch, 1998 from Mt. Bandahara; B, J. selita n. sp. holotype; C, J. angula n. sp. holotype. Scale bar = 1 mm. (Photographs by: S. Ingrisch).

Fig. 9. Male abdominal apex of Jambiliara species: A, B, in oblique dorsal view; C, H, in dorsal view; D, G, in apical view; E, F, apex of subgenital plate in apical view (E, in dried specimen with styli collapsed; F, in fresh specimen with styli firm): A, B, J. macroptera Ingrisch, 1998 from Mt. Bandahara; C–F, J. selita n. sp. (C–E, holotype; F, paratype); G, H, J. angula n. sp. holotype. Abbreviations: 10t, tenth abdominal tergite; ce, cercus; e, epiproct; pa, paraproct; pr, projection of subgenital plate; sg, subgenital plate; s, stylus. The arrows point at the tooth or constriction of the subgenital plate lobes. Scale bar = 1 mm. (Photographs by: S. Ingrisch [A–H except F] and M. K. Tan [F]).

Fig. 10. Male titillators of Jambiliara species in dorsal view (A, C, F, G) and dorso-apical view (B, D, H, I): A, B, J. macroptera Ingrisch, 1998 from Mt. Bandahara; C–F, J. selita n. sp. (C–E, holotype; F, paratype); G–I, J. angula n. sp. holotype. Abbreviations: bs, baso-lateral sclerite; ls, small lateral sclerite. The arrows point at the different serrulation of the titillator margin. Scale in G for upper row and H, in B for middle row and E. Scale bars = 1 mm. (Photographs by: S. Ingrisch [A–I except F] and Y. C. Ang [F]).

Fig. 11. Jambiliara species: A, C, E, H, female abdominal apex with subgenital plate in lateral view; B, D, F, G, I, female subgenital plate in ventral view: A, B, J. macroptera Ingrisch, 1998 holotype; C–H, J. selita n. sp. paratypes (C, D, from Selita; E, F, from Perak; G, H, from BTNR); I, J. moultonii (Karny, 1923) holotype. Abbreviations: ce, cercus; ov, base of ovipositor; sg, subgenital plate. Scale bars = 1 mm. (Photographs by: S. Ingrisch [A–I except G, H] and M. K. Tan [G, H]).