Jambiliara selita, Ingrisch & Tan, 2012

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 : 146-147

Jambiliara selita , new species

Figs. 6E–G , 7C, D , 8B , 9C–F , 10C–F , 11C–H

Material examined. — Holotype: male ( BMNH): Singapore (1°22'N, 103°49'E), coll. H. N. Ridley, 1901 . Paratypes: Singapore: 1 female ( NHMW), Selita [Seletar, 1°25'N, 103°52'E], coll. Ransont [Eugen von Ransonnet], 10 Mar.1871 ; 1 male ( ZRC), CCNR, along Chestnut Track , coll. M. K. Tan, 17 Dec.2010 ; 1 female ( ZRC), Dairy Farm Nature Park (near BTNR), along Wallace Trail , coll. M. K. Tan, 27 Jan.2011 . Malaysia: 1 female ( ZSM), Perak, coll. H. Stichel, from old collection .

Diagnosis. — The new species is very similar to J. macroptera . It differs by the male subgenital plate having a small tooth at the base of the compressed apical projections but the styli reduced to soft button-like structures, the shape of the stridulatory area of both tegmina, and the teeth of the stridulatory file on the underside of the left tegmen with 43 teeth per mm being rather spaced. The female subgenital plate has the apex rounded.

Description. — As genus. Fastigium verticis conical with weak dorsal furrow; apex obtuse, nearly truncate. Pronotum with apical area little 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 0–2 external, 3 internal; mesofemur 3–4 external, 0–1 internal; postfemur 7–9 external, 5–6 internal.

Male: Stridulatory area of left tegmen as in Fig. 7C, D . Stridulatory file on underside of left tegmen regularly curved with densely arranged teeth; 3.1 mm long, with 135 teeth, equating 43 teeth per mm; in middle of file with 33 teeth per mm ( Fig. 8B ). Mirror on right tegmen 2.14 mm long, 2.00 mm wide; index length to width 1.07–1.11 ( Fig. 7D ). Tenth abdominal tergite wider than long; dorsal area very little prolonged, faintly bi-globular with shallow medial furrow; apical margin in middle excised with truncate bottom and spinose projection on both sides of excision ( Fig. 9C ). Epiproct rounded laterally, apex triangular (can be rounded in dried specimens); dorsal surface faintly grooved with carinate margins. Paraproctes with tuberculate projection. Cerci short cylindrical, curved; apex broadly rounded with preapical, internal, short triangular projection with spiniform tip; before apical projection on ventro-internal margin with a long, compressed, curved projection gradually tapering ventrad, at tip with proximal angle obtuse, distal angle little prolonged into acute cone ( Fig. 9D ). 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; in apical view margin on both sides of excision with a small obtuse tooth at base of compressed projections; projections with concave internal surface; before rounded apex of projection with reduced tuberculate stylus with soft base; in dried specimens stylus collapsed to a fold, tubercle or weak elevation of various shapes ( Fig. 9E, F ). Titillators fused in middle; basal parts deviating, with nearly parallel margins to base; very base with margin partly recurved, irregular and furrowed; 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, with double-fold margins and standing vertically to the plates; apical margin of apical plates granulated with granules not reaching terminal structure of process ( Fig. 10C–F ). Membranous part of phallus near titillator apex densely setose; on opposing side with a small elongate apico-lateral sclerite.

Female: Epiproct triangularly rounded. Cerci conical, apex pointing ( Fig. 11H ). Subgenital plate in general outline rounded; in alive specimens smooth ( Fig. 11G ), in dried specimens often distorted with folds or furrows ( Fig. 11D, F ); lateral areas setose. Ovipositor compressed blade-shaped; highest little behind middle; margins smooth.

Colouration: Brown. Lateral areas of scapus and pedicellus black. Vertex at hind margin with two black spots. Pronotum with narrow irregular black lateral bands. Abdomen with intersegmental membranes surrounding sternites black. Tegmen maculated. Hind wings with dark brown infumation, along fore margin paler and with white veinlets, in some specimens also along external margin brightened up ( Fig. 6F ). Legs indistinctly maculated.

Measurements (2 males, 3 females): Body with wings: male 39–40, female 43–44; body without wings: male 25–31, female 26–29; pronotum: male 9.2–9.5, female 8.2–8.7; tegmen: male 29.0–29.5, female 34.0–34.5; hind femur: male 21.0–22.4, female 22.5–24.6; ovipositor: female 22.0–26.5; ovipositor height: female 2.0– 2.2 mm.

Etymology. — The name is derived from the locality of the oldest specimen, Selita. Two images in Ransonnet (1876) give us an idea of how the habitat looked like at the time of collection in 1871.

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]).