Varitrella (Cantotrella) trusmadi Gorochov

Gorochov, Andrej V. & Tan, Ming Kai, 2014, Species of the subgenus Cantotrella (Orthoptera: Gryllidae: Podoscirtinae: Varitrella) from Singapore, Malaysia and Indonesia, Zootaxa 3774 (6), pp. 535-551 : 540-542

Varitrella (Cantotrella) trusmadi Gorochov , sp. nov.

( Figs 3 , 12 , 23 , 35–38)

Material examined. Holotype (male): Malaysia, Sabah State (Borneo), Trus Madi Mount, about 1000 m, partly primary / partly secondary forest, at light, 13–25 May 2007, A. Gorochov ( ZIN).

Description. Male (holotype). General appearance similar to that of V. or i on. Coloration light (yellowish grey) with following pattern ( Figs 3 , 12 , 23 ): head dorsum with brown spot between ocelli, brownish grey (not very distinct) interrupted longitudinal stripes behind this spot; eyes with light brown upper and darker (brown) lower halves; genae with brown upper and light lower halves; antennal flagellum with numerous brownish grey and lighter spots; rest of head with a few small brown marks on frons under rostral apex and under antennal cavities as well as with small dark brown spot in region of each dorsolateral corner of clypeus; pronotum with rather numerous dark dots on anteromedian and posteromedian parts of disc, with greyish brown longitudinal band on each lateal lobe near dorsal edge, and with not numerous dark dots on lower part of this lobe; tegmina with greyish brown (but lighter than previous band) dorsal field having yellowish humeral stripe and a few small spots (yellow spot near plectrum, whitish spots in lateral part of apical area, and almost dark brown areas at tegminal base, near plectrum and in lateral part of mirror), with yellowish area between R and M, with brown very narrow area between stock of Sc and R (distal part of this area light), and with semitransparent membranes of costal area having rather numerous small dark spots in proximal part and along stock of Sc in middle and distal parts; legs with numerous dark and darkish dots and small spots as well as with several somewhat larger dark brown spots on hind femur along ventral outer keel and along distal part of ventral inner keel; abdomen with rather numerous darkish dots and small spots on sternites and sparse darkish spots on dorsal cercal surface. Head and pronotum similar to that of V. orion in structure, but scape approximately twice as wide as rostral apex, ocelli medium-sized, and pronotum distinctly more widened in posterior part ( Fig. 3 ). Tegmina long, with venation as in Fig. 12 ; hind wings distinctly longer than tegmina; legs also more or less similar to those of V. o r i o n. Anal plate as in Fig. 23 ; genital plate moderately elongate, slightly narrowing to almost rounded apex, and with median groove on distal half of this plate. Genitalia with moderately high and comparatively wide (long) dorsal epiphallic spines directed upwards, rather long distal epiphallic part (behind these spines), clearly longer proximal epiphallic part (before spines), rather high and roundly truncate apical parts of epiphallus in profile, rather long ectoparameres having spine-like distal part short and curved downwards, long rachis (guiding rod) having very short and strongly widened apical part, and moderately long formula (mold of spermatophore attachment plate) (Figs 35–37); spermatophore with rather short and thick (almost globular) ampulla (Fig. 38).

Female unknown.

Length in mm. Body 20; body with wings 28; pronotum 3.1; tegmina 18; hind femora 11.5.

Comparison. The new species is similar to V. orion , V. variabilis and V. glabra in the structure of male genitalia. From V. o r i o n, the new species differs in shorter dorsal epiphallic spines, a longer proximal part of epiphallus (before these spines), higher apical parts of epiphallus in profile, and distinctly shorter both distal (curved) part of ectoparameres and apical (widened) part of rachis; from V. variabilis , in larger dorsal epiphallic spines having their bases less widely separated from each other, a slightly concave dorsal edge of the epiphallic proximal part (before these spines) in profile, distinctly longer ectoparameres, a wider and somewhat shorter apical part of rachis, a less narrow formula, and a shorter spermatophore ampulla; and from V. gl a br a, in a narrower area between the mirror and a longest oblique vein in the male dorsal tegminal field, a slightly longer light membranous area on the male anal plate, and the same characters of epiphallus and of spermatophore as from V. variabilis (excepting size of the dorsal epiphallic spines).

Figures

FIGURES 2 – 9. Head and pronotum of male from above: 2, Varitrella orion sp. nov.; 3, V. trusmadi sp. nov.; 4, V. striata sp. nov.; 5, V. ro bu st a sp. nov.; 6, V. suk au sp. nov.; 7. V. tawau sp. nov.; 8, V. amoena sp. nov.; 9, V. manukan sp. nov.

FIGURES 12 – 15. Left and right male tegmina: 12, Varitrella trusmadi sp. nov.; 13, V. striata sp. nov.; 14, V. tawau sp. nov.; 15, V. amoena sp. nov.

FIGURES 20 – 31. Varitrella, male: 20 – 22, V. orion sp. nov., stridulatory vein of right tegmen from below (20), abdominal apex from above (21), and genital plate from below (22); 23 – 28, anal plate partly from above and partly from behind in V. trusmadi sp. nov. (23), V. striata sp. nov. (24), V. robusta sp. nov. (25), V. tawau sp. nov. (26), V. suk au sp. nov. (27) and V. amoena sp. nov. (28); 29 – 31, genitalia of V. palawanensis (29), V. mindoroensis (30) and V. quadrata (31) from side and from below, with names of morphological structures. Abbreviations: ds, dorsal epiphallic spine; ec, ectoparamere; ea, endoparameral apodeme; en, endoparamere; ep, epiphallus; f, formula (= mold of spermatophore attachment plate); lo, lateral lobe of rachis; mr, median sclerotized ribbon fused with formula; r, rachis (= guiding rod); ra, ramus.