Angara rubra Fianco, 2025

Fianco, Marcos & Melo, Gabriel A. R., 2025, Molecular systematics and species revision of a Neotropical genus of flightless phaneropterine katydids (Orthoptera: Tettigoniidae: Phaneropterinae), Zoological Journal of the Linnean Society 204 (2) : -

Angara rubra Fianco sp. nov.

( Figs 8, 10D, 14C, D)

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Diagnosis: Angara rubra can be distinguished readily from species of Angara from Clade B by the aforementioned characters. The new species can be distinguished easily from its congeners by the following combination of characters: body reddish; pronotum wide, lateral lobes visible from above; frons black, gena and vertex blackish or black; band on lateral carinae bicolour; stridulatory vein thin; veins on tegmina evident, brownish; subgenital plate wider than long.

Description: Holotype male ( Fig. 8): overall aspect ( Figs 8A, 14C): small- to medium-sized katydids, general colour reddish, a laterally coloured strip from head to abdominal tip. Head ( Fig. 8B–D): frons slightly rugose, with blackish/brownish stains; fastigium of frons triangular, a little higher than wide, ocelli present, light brown. Gena smooth, entirely black. Clypeus blackish proximally, yellowish from middle to apex. Labrum yellowish, apex distinctly yellow. Maxillary and mandibular palps brownish, apex of all articles blackish. Scape as long as 0.5× pedicel; inner and posterior margin of scape and pedicel brown, lateral and anterior margin black; flagellum ≥ 3× longer than body, entirely black, but first two flagellomeres brownish medially. Fastigium of vertex not elevated, one lateral ocellus near half of fastigium of vertex; a medial yellowish line from fastigium of vertex towards pronotum; a lateral yellowish line from eye towards pronotum. Thorax ( Fig. 8B–E): pronotal disc ( Fig. 8B, C) glabrous, reddish with small black punctuations; anterior margin slightly sinuous; posterior margin black and distinctly elevated. Lateral carinae ( Fig. 8B–D) bearing a sulcus near half region which extends to lateral lobes, a bicolour band throughout its extent with a black– white pattern from top to bottom; a medial yellowish line from anterior to posterior edges. Lateral lobes ( Fig. 8C, D) long, 1.5× longer than wide, anterior margin sinuous, inferior margin concave, posterior margin slightly curved, reddish with dark red punctations and blackish stains. Tegmina ( Fig. 8E) rounded, stridulatory vein dark brown, call areas black, but all veins dark brown. Epimeron II 1.5× wider than episternum II; epimeron III as wide as episternum III; episternum II and III and epimeron II and III reddish, but blackish near coxa. Legs ( Fig. 8A): all coxae with a dorsal black spot and with blackish/dark brown stains ventrally; all trochanters black; fore- and middle legs dark brown with black punctuations, femora light brown proximally; femur III dark brown but bearing yellow stains proximally, ventrally lightly yellow and medially light brown proximally; tibiae III entirely black; tarsomeres of legs I and II entirely black; three first tarsomeres on leg III black on ventral margin and brown dorsally, last tarsomere brownish; femur III ~6.5× longer than pronotum. Abdomen ( Fig. 8A, F, G): tergites reddish with several dark red granulations; traversed by a tricolour band (seen only laterally), black–white–red from top to bottom. Tergite X ( Fig. 8F) with a shallow depression on medial region. Subgenital plate ( Fig. 8G) trapezoidal, 1.5× wider than long; styliform processes wider than long; median keel present. Cerci ( Fig. 8F, G) curved, short and thick, thickness decreasing gradually towards the apical curvature to the medial region, where it decreases abruptly, with a black apical tooth at apex.

Paratype female ( Figs 10D, 14D): Larger than male. Fastigium of frons globose. Anterior margin of pronotum straight. Lateral carinae bicolour, black on top and white on bottom. Tegmina rounded, entirely black, but veins dark brown. Coloration of legs as in males, with the exception of the proximal part of femur II, which is light yellow, and femur III with a yellow line from base to middle region. Ovipositor 2.7× longer than pronotal disc, curved up and acuminate; serrulations beginning on the distal sixth of dorsal valves and distal seventh of ventral valves. Other morphological details of head as in males.

Measurements (in millimetres): Holotype: BL, 14.8; TegL, 1.2; HW, 2.3; HH, 2.8; PrL, 2.9; PLL, 2.3; PrH, 1.6; FLiii, 19.1; TLiii, 21.8; SPL, 1.9; CL, 1.7. Male paratypes: BL, 14–15.2; TegL, 1.1–1.4; HW, 2.2–2.5; HH, 2.5–2.9; PrL, 2.7–3.1; PLL, 2.1–2.8; PrH, 1.4–1.9; FLiii, 18.5–19.2; TLiii, 21.2–22.2; SPL, 1.8–2.2; CL, 1.6–1.9. Female paratypes: BL, 18.2–19.8; TegL, 0.7–1; HW, 2.4–3.2; HH, 2.6–3.5; PrL, 3.2–3.9; PLL, 2.7–3.2; PrH, 1.5–1.9; FLiii, 19.2–20.7; TLiii, 22.9–23.8; SPL, 0.9–1.2; OL, 9.2–10.4.

Etymology: The specific epithet is from the Latin rubra , meaning red, alluding to the reddish general coloration.

Type material: Holotype male ‘ Brasil, RS, Derrubadas , \ Pq. Est. do Turvo \ 27.2287°S, 53.8509°W \ 420m, 12-16.XII.2022, M. Fianco & G. Melo’ . Paratypes: one male and three females, same data as holotype ; one male, ‘ Brasil, RS, Derrubadas , \ Pq. Est. do Turvo \ 27.1391°S, 53.8807°W \ 190m, 12-16.XII.2022, M. Fianco & G. Melo’ ; two females ‘ Brasil, RS, Derrubadas , \ Pq. Est. do Turvo \ 27.2461°S, 53.9637°W \ 410m, 12-16.XII.2022, \ M. Fianco & G. Melo’ ; two males and one female ‘ Brasil, RS, Derrubadas , \ Pq. Est. do Turvo \ 27.1675°S, 53.8542°W \ 300m, 12-16.XII.2022, M. Fianco & G. Melo’, with one of the males and the female having the additional labels ‘MFM 140’ and ‘MFM151’, respectively .