Elbenia (Elbenia) semicarinata, 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 : 17-19

Elbenia (Elbenia) semicarinata Gorochov, sp. n.

https://zoobank.org/NomenclaturalActs/ D8C50474-A87F-4DF4-9F9F-6056A1C1025D

Figs 75 –82

MATERIAL. Holotype – ♂, Indonesia: Sumatra I., Aceh Prov. not far from North Sumatra Prov., environs of Ketambe Vill. on Alas River near Gunung Leuser Nationjal Park , 3º41–42ʹ N, 97º38.39ʹ E, 300–500 m, primary forest, at light, 29.I–8.II 2023, A. Gorochov , M. Omelko, A. Fomitshev ( ZIN) . Paratypes: 1 ♂, same data as for holotype ( ZIN) ; 1 ♂, same data but, 15–24.IV 2018, A. Gorochov , M. Berezin, I. Kamskov, E. Tkatsheva ( ZIN) .

DESCRIPTION. Male (holotype). General appearance similar to that of E. (E.) carinata sp. n. Coloration uniformly greenish with large blackish spot on proximal portion of left dorsal tegminal field (this spot including following parts: strudulatory vein, short stripe along this vein but after it, most part of basal area before this vein as well as part of M-Cu area near these blackish marks; Fig. 80), somewhat smaller blackish spot on right dorsal tegminal field (this spot not including medial halves of above-listed parts of dorsal field except for latter one; Fig. 81), semitransparent membranes of mirror and of cells around it in right tegmen, and light brown to brown marks on other body parts as in this species.

Figs 80–91. Elbenia (Elbenia) , male: 80–82 – E. (E.) semicarinata sp. n.; 83–85 – E. (E.) apicata sp. n.; 86–88 – E. (Elbenia) paradigitata sp. n.; 89–91 – E. (E.) neodigitata sp. n. Stridulatory apparatus of left (80, 84, 86, 90) and right (81, 85, 87, 91) dorsal tegminal fields from above; teeth of stridulatory vein of left tegmen from below (82, 83, 88, 89).

Tegminal stridulatory apparatus as in Figs 80–82; dorsal part of left stridulatory vein very convex (almost keel-like but not lamellar); basal area with keel-like (lamellar) dorsal parts of 1A and 2A in both tegmina as well as with similar majority of crossveins in left tegmen (Figs 80, 81). Last abdominal tergite, epiproct, paraprocts and cerci almost as in E. (E.) carinata sp. n., but cerci shorter and more strongly curved ( Figs 75, 77, 78 ); genital plate rather large, with a pair of long posterior lobes which slightly longer than half of this plate and straight in proximal two thirds as well as with apical thirds strongly curved upwards (these apical parts almost lamellar in transversely vertical plane as well as having 4–5 distinct teeth directed upwards and somewhart laterally; Figs 76–78 ).

Variations. In paratypes, posterior lobes of last tergite almost pressed to each other, apices of posterior lobes of genital plate located more near each other than in holotype ( Fig. 79 ), number of teeth on apices of these lobes varied from 4 to 6, and dark spots on dorsal tegminal fields dark brown to almost brown.

Female unknown.

Length (mm). Body 19–21; body with wings 44–47; pronotum 5–5.2; tegmina 34–36; hind femora 20–21.5.

COMPARISON. The new species is similar to E. (E.) nigrosignata in the structure of the male last abdominal tergite (including length and shape of its posterior lobes) as well as the shape of the male cerci, but it differs from the latter species in the lobes of the male genital plate having their distal (curved upwards) parts lower and directed only upwards (vs. these parts are clearly higher and directed upwards/forwards). From E. (E.) carinata sp. n., the new species is distinguished by the stridulatory vein of the left tegmen with its dorsal part less keel-like and not lamellar, and by the distal portions of the posterior lobes of the male genital plate distinctly less narrow and less high as well as more flattened and with apical teeth (compare Figs 65, 68 and 77, 79 ). From all other species of this subgenus, E. (E.) semicarinata sp. n. differs in the male last tergite lobes spine-like (not thickened, not widened and with more or less acute apices) and/or located more near each other, the male cerci evenly arcuate (but not with more strongly curved distal parts), and the male genital plate lobes longer, non-denticulated medially, with distal parts curved upwards but not high, or with rather strong and more numerous teeth at the apices (in E. brevixipha , each of these apices with two thinner and longer teeth; Figs 111, 112).

ETYMOLOGY. This species name originates from the species name “carinata ” with the Latin prefix “semi-” (half, partly) due to similarities between the two species.

Figures

Figs 63–79. Elbenia (Elbenia), male: 63–68 – E. (E.) carinata sp. n.; 69 – E. (E.)?nigrosignata (Stål); 70–74 – E. (E.) apicata sp. n.; 75–79 – E. (E.) semicarinata sp. n. Male abdominal apex from above (63, 70, 75), from below (64, 71, 76), from side (65, 72, 77) and from behind (66, 67, 69, 73, 78); left lobe (68, 74) or both lobes (79) of genital plate from behind. [69, after Karny (1923).]