Ombrotrella reducta Gorochov, 2025

Gorochov, A. V., 2025, Taxonomy of Podoscirtinae (Orthoptera: Gryllidae). Part 17: some Madagascan genera and Varitrella, Russian Entomological Journal 34 (1), pp. 19-36 : 23

Ombrotrella reducta Gorochov , sp.n.

Figs 3–7 , 13–20 .

MATERIAL EXAMINED. Holotype ♂, Madagascar, Toamasina Prov., Moramanga Distr., Analamazaotra Forest Station near Andasibe Vill. (18º56′S, 48º25′E), ~ 900 m, primary forest, at light, 8–20.III.2013, A. Gorochov ( ZIN). Paratype 1 ♂, same data as for holotype ( ZIN) .

DESCRIPTION. Male (holotype). General appearance similar to that of O. beccalonii but with some characterisrtic features. Body coloration very light greenish with following marks: dorsum of epicranium rose (except for anterior portion of rostrum and transverse band along occiput) but with small brown spot near posterior part of median ocellus, dark brown similar spot along medial edge of each lateral ocellus and a pair of small yellowish spots between eyes ( Fig. 3 ); eyes light greyish brown with rose dorsal parts; ocelli whitish; tegmina with whitish venation and some membranes in lateral fields, almost transparent rest of these membranes and light yellowish grey dorsal fields (these fields with greenish tinge: Figs 4, 5 ); abdominal apex with grey apical portion of anal plate proximal part and with greyish tinge on subapical portion of this part ( Figs 18, 19 ) and on proximal parts of cerci ( Fig. 20 ). All ocelli almost equal to each other in size, slightly wider than high and with barely wider (than in O. beccalonii ) interspaces between them, as well as lateral ocelli somewhat more longitudinally located than in aforementioned species (in latter species, all ocelli strongly transverse, and median ocellus clearly smaller than lateral ones; compare Figs 1 and 3 ); pronotum with almost parallel lateral sides, and its disc slightly shorter than in O. beccalonii as well as with almost straight anterior edge and weakly convex posterior one ( Fig. 3 ); tegmina distinguished from those of this species by diagonal and oblique veins in stridulatory apparatus shorter, mirror of this apparatus smaller (and slightly different in shape in left and right tegmina), long semicircular cell behind mirror reduced, and apical area longer and with more parallel venation (see Figs 2 and 4, 5 ); fore tibia slightly less flattened than in this species and with barely shorter both tympana, but inner tympanum open and similar to outer one (vs inner tympanum also open but insignificantly immersed); anal plate with proximal portion having almost truncate (not distinctly notched) posterior part ( Fig. 18 ); genital plate with distal (narrowed) portion somewhat longer than in aforementioned species ( Fig. 20 ). Genitalia and spermatophore with following differences from those of O. beccalonii (compare Figs 8–12 and 13–15 ): apical lobes of epiphallus behind its subapical (dorsal) projection narrower and longer (more distinctly separated from this projection); ectoparameres longer (protruding beyond epiphallic apices in rest position; vs not reaching these apices) and with not widened and almost straight distal portions as well as obliquely truncated apices (vs each ectoparamere slightly widened in distal portion, with thin and semimembranous as well as often hooked appendix at apex); rachis with clearly narrower distal portion; formula divided into three sclerites by very narrow membranous interspaces (vs it undivided into separate sclerites); spermatophore with less elongate ampulla, shorter rest part and without characteristic triangular plate on collum (neck) near ampulla.

Variation. Paratype with mainly light yellowish coloration having greyish tinge and almost brown dorsum of head as well as light brown dorsal tegminal field, and with following differences from holotype in body structure: shape of pronotal disc practically intermediate between those of holotype and O. beccalonii ; tegminal mirror even more reduced (divided into three cells; Fig. 7 ); genitalia slightly wider in middle portion and with small apical parts of ectoparameres curved downwards ( Figs 16, 17 ).

Female unknown.

Length in mm. Body 10.5–11.7; body with wings 18–18.7; pronotum 1.9–2.1; tegmina 12.8–13.5; hind femora 7.2.

COMPARISON. The new species clearly differs from O. beccalonii in the characters of its coloration and structure of some body parts (ocelli, tegmina, anal plate and genitalia) as well as shape of the spermatophore listed in the description above.

ETYMOLOGY. This species name is the Latin word “reducta ” (reduced) due to the partly reduced stridulatory apparatus in the male tegmina.

Figures

Figs 1–7. Ombrotrella, male: 1, 2 — O. beccalonii; 3–7 — O. reducta sp.n., holotype (3–5) and paratype (6, 7). Head with pronotum and fore legs from above (1, 3, 6); right (2, 5) and left (4) tegmina; dorsal field of right tegmen (7). Рис. 1–7. Ombrotrella, самец: 1, 2 — O. beccalonii; 3–7 — O. reducta sp.n., голотип (3–5) и паратип (6, 7). Голова с переднеспинкой и передними ногами сверху (1, 3, 6); правое (2, 5) и левое (4) надкрыльЯ; дорсальное поле правого надкрыльЯ (7).

Figs 8–20. Ombrotrella, male: 8–12 — O. beccalonii, holotype (11, 12); 13–20 — O. reducta sp.n., holotype (13–15, 18–20) and paratype (16, 17). Genitalia from below (8, 11, 13, 16) and from side (9, 12, 14, 17); spermatophore from side (10, 15); anal plate from above/behind (18) and from behind/below (19); genital plate from below (20). Рис. 8–20. Ombrotrella, самец: 8–12 — O. beccalonii, голотип (11, 12); 13–20 — O. reducta sp.n., голотип (13–15, 18–20) и паратип (16, 17). Гениталии сниЗу (8, 11, 13, 16) и сбоку (9, 12, 14, 17); сперматофор сбоку (10, 15); анальнаЯ пластинка сверху/сЗади (18) и сЗади/ сниЗу (19); генитальнаЯ пластинка сниЗу (20).