Tembelingiola belaitensis Tan, Gorochov & Wahab, 2019

Tan, Ming Kai, Gorochov, Andrei V., Wahab, Rodzay Bin Haji Abdul, Japir, Razy & Chung, Arthur Y. C., 2019, New taxa of crickets (Orthoptera: Grylloidea: Gryllinae, Phaloriinae and Pteroplistinae) from northern Borneo (Belait and Sandakan), Zootaxa 4661 (1), pp. 101-117 : 112-115

Tembelingiola belaitensis Tan, Gorochov & Wahab , new species

( Figs. 10–12 )

Material examined. Holotype (male, BRU.19.44), Brunei Darussalam, Belait District, Andulau Forest Reserve , near peat swamp forest, N4.62535, E114.51429, 101.4±6.0 m, 28 February 2019, 2043 hours, calling on tree trunk, coll. M.K. Tan & H. Yeo ( UBDM).

Paratype: 1 female ( BRU.19.52), Brunei Darussalam, Belait District, along Jalan Labi at Teraja , abandoned fruit plantation, N4.28462, E114.41859, 36.8± 6.1 m, 1 March 2019, 2010 hours, on branch of tree sapling, coll. M.K. Tan & H. Yeo ( ZRC) .

Diagnosis. The new species strongly differs from the type and previously alone species of this genus in the male genitalia having ectoparameres much smaller (narrower and shorter, strongly not reaching apices of epiphallic posterolateral lobes), rachis with much longer distal (narrowed) part, endoparameral apodemes shorter, formula also shorter but with much wider lateral parts.

Description. Male ( Fig. 10A ). Body well pubescent ( Figs 11A, 11B ). Head with rostrum angularly-rounded in profile ( Fig. 11B ); this rostrum between antennal cavities slightly wider than scapus; ocelli present, rounded; lateral ocelli smaller than median ocellus. Pronotum weakly transverse, barely widening posteriorly; anterior and posterior margins of pronotal disc fairly straight ( Fig. 11A ). Inner tympanum large, oval (opened) and not immersed; outer tympanum undeveloped; hind tibiae with only numerous small dorsal denticles with 3 pairs of apical spurs; hind basitarsus with 2 rows of dorsal spines (each row with 5–6 spines); apical spurs of hind basitarsus long but not reaching middle of third tarsomere. Tegmina slightly surpassing abdominal apex; its dorsal field with rather long diagonal vein, moderately short apical area, 6 oblique veins (3 long ones and 3 shorter ones), and tegminal mirror approximately 1.1 times as wide as long ( Fig. 11A ); lateral tegminal field with about 11 branches of Sc and 12 crossveins between R and M; hind wings not exposed ( Fig. 11B ). Subgenital plate wider than long, with apex having an angular posteromedian projection (with obtuse apex) and very short posterolateral projections and with notches between posteromedian lobule and posterolateral lobules. Male genitalia as shown in Fig. 11 C–E: epiphallus (ep) divided into two lateral parts; posterolateral epiphallic lobes (p.ep) broad and moderately long, with inner margins concave in dorsal view, and with external margins straight but curved inwards at the distal part (distal parts of these lobes slightly hook-like, with apices obtusely rounded); rachis (ra) strongly sclerotized, long and straight; apical part of rachis tapering into an acute apex; ectoparameres (ec) very small (narrow and shortened, strongly not reaching apices of epiphallic posterolateral lobes); endoparameres (en) completely fused with rachis, with apodemes short; formula (f) short, lamellate and weakly sclerotized, divided into two lateral half, each half with a short process (*) at the interior end pointing dorsad; rami (r) weakly sclerotized, fused with epiphallus, in dorsal view somewhat arcuately curved in distal part and straight in rest part, and lamellate in lateral view.

Female ( Figs. 10B , 12A, 12B ). Colouration and structure of body similar to male. However, terminal dorsal field with 5 partly oblique longitudinal branches and with not numerous and slightly irregular crossveins (some of these cross-veins rather long and very oblique, i.e. situated almost longitudinally) ( Fig. 12A ), lateral field with 3 branches of Sc and with cross-veins between R and M indistinct ( Fig. 12B ). Subgenital plate wide but gradually narrowing backwards, with almost widely truncate apex having shallow and rather wide posteromedian notch. Ovipositor dark rufous, weakly arcuate in profile, with middle part rather high (wide) and distal third gradually narrowing to acute apex ( Fig. 12D ).

Colouration. Brown with following marks: head, pronotum and abdomen with rufous tinge; thoracic sternites light brown; hind legs with distal femoral area, knee, and tibia dark rufous; tegmina light brown but with darker (brown) spots between longest oblique vein of dorsal field and mirror, between R and M, and in apical area.

Measurements (in mm). Male holotype BL = 7.4; HL = 1.6; PL = 2.2; PW = 2.6; TL = 5.8; TW = 3.0; HFL = 5.9; HTL = 4.0. Female paratype BL = 7.2; HL = 1.7; PL = 2.4; PW = 2.7; TL = 5.8; HFL = 6.6; HTL = 3.9; OL = 4.6.

Etymology. The species is named after the type locality, Belait.

Figures

FIGURE 10. Tembelingiola belaitensis Tan, Gorochov & Wahab, sp. nov. male holotype (A) and female paratype (B) in natural environment.

FIGURE 11. Tembelingiola belaitensis Tan, Gorochov & Wahab, sp. nov. male holotype: habitus in dorsal (A) and lateral (B) views; genitalia in dorsal (C), ventral (D) and lateral (E) views.

FIGURE 12. Tembelingiola belaitensis Tan, Gorochov & Wahab, sp. nov. female paratype: habitus in lateral (A) and dorsal (B) views; head in lateral view (C); ovipositor in lateral view (D).