Elbenia (Tamdaopteron) subrecta, Gorochov, 2023

Gorochov, A. V., 2023, Taxonomy of the katydids (Orthoptera: Tettigoniidae) from East Asia and adjacent islands. Communication 16, Far Eastern Entomologist 485, pp. 7-28 : 15

Elbenia (Tamdaopteron) subrecta Gorochov, sp. n.

https://zoobank.org/NomenclaturalActs/ E5AB284F-4E38-4D31-B968-E30028771633

Figs 7–9 , 46–50

MATERIAL. Holotype – ♂, Indonesia: Sumatra I., Aceh Prov. not far from North Sumatra Prov., environs of Kedah Lodge on Angkasan River near Gunung Leuser National Park (Mr. Jali’s Bungalows, 3.97 N, 97.25 E), 1000–1500 m, primary forest, at light, 9–15.II 2023, A. Gorochov , M. Omelko, A. Fomitshev ( ZIN). Paratypes: 3 ♂, same data as for holotype ( ZIN) .

DESCRIPTION. Male (holotype). General appearance similar to that of E. (T.) ryabovi sp. n. and E. (T.) daedala sp. n. Coloration uniformly greenish with basal area of each dorsal tegminal field as in latter species, but stridulatory vein of left tegmen bicolorous (its medial half dark brown, and its lateral half brown to almost light brown; Figs 7, 8 ), and other marks as in above-mentioned congeners. Structure of tegminal stridulatory apparatus as in Figs 7–9 ; last abdominal tergite similar to that of these species but having distinctly shorter apical lobes which almost dorsoventrally lamellar and apically truncated (notch between these lobes narrower than in these species and with rounded anterior part, and each of these lobes with angular posterolateral corner and rounded posteromedial one; Figs 46, 48); other structures approximately as in E. (T.) daedala sp. n., except for genital plate which with similar proximal half (including depth of posteromedian notch) but with somewhat less long and almost straight lobes having thin spine-like process at each apex (this process directed upwards/backwards and somewhat medially, and with three small apical denticles; Figs 46– 50).

Variations. Coloration of dorsal tegminal fields varied from that as in holotype to that as in lightest paratype of E. (T.) daedala sp. n. and sometimes with additional brownish marks near apex of widened part of each of these fields; posterolateral and posteromedial corners of each apical lobe of last tergite less angular and/or less rounded, respectively.

Female unknown.

Length (in mm). Body 22–25; body with wings 48–51; pronotum 5–5.3; tegmina 36–38; hind femora 19–20.

COMPARISON. The new species is most similar to E. (T.) pendleburyi from Malay Peninsula in truncated apices of the apical lobes of the male last tergite, but it differs from the latter species in a more or less rounded (but not distinctly angular) posteromedial corner of each apical lobe of the male last tergite as well as the lobes of the male genital plate shorter, almost straight and with a spine-like apical process at each apex (vs. these lobes are clearly longer, strongly curved upwards and without any spine-like apical processes; compare Figs 46–48 and 51–53). From all other species of Tamdaopteron , it is distinguished by clearly truncated apices of the apical lobes of the male last tergite as well as an almost straight male genital plate in profile (Figs 13–21, 24–45, 54–56).

ETYMOLOGY. This species name originates from the Latin prefix “sub-“ (under, near) and the Latin word “recta” (straight) due to the male genital plate shape.

Figures

Figs 1–12. Elbenia, male: 1–3 – E. (Tamdaopteron) ryabovi sp. n.; 4–6 – E. (T.) daedala sp. n.; 7–9 – E. (T.) subrecta sp. n.; 10–12 – E. (Elbenia) carinata sp. n. Stridulatory apparatus of left (1, 5, 7, 11) and right (2, 6, 8, 12) dorsal tegminal fields from above; teeth of stridulatory vein of left tegmen from below (3, 4, 9, 10).