Elbenia (Elbenia) carinata, 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 : 16-17

Elbenia (Elbenia) carinata Gorochov, sp. n.

https://zoobank.org/NomenclaturalActs/ DD4C6923-8D47-4D5F-8631-F844E9BCD000

Figs 10–12 , 63–68

MATERIAL. Holotype – ♂, Malaysia: Borneo I., Sabah State, Trus Madi Mt, ~ 1000 m, primary/secondary forest, at light, 13–25. V 2007, A. Gorochov ( ZIN). Paratypes: 2 ♂, same data as for holotype ( ZIN) .

DESCRIPTION. Male (holotype). General appearance similar to that of all species previously described here, but dorsal tegminal field with characteristic venation: in left tegmen, stridulatory vein, 1A and 2A in basal area as well as short portion of vein near stridulatory one (but after it) with dorsal parts distinctly keel-like and more or less lamellar (dorsal parts of crossveins in this area also similar in structure but lower; Fig. 11 ); in right tegmen, stridulatory vein and these crossveins more or less simple ( Fig. 12 ). Coloration uniformly greenish with dark brown proximal half of widened part of left dorsal tegminal field and most part of such half in right tegminal field (medial third of latter half light), semitransparent membranes of mirror and cells around it in right tegmen as well as brown to light brown apical parts of spines, claws, apices of cerci and of genital plate lobes. Tegminal stridulatory apparatus as in Figs 10–12 ; last tergite with a pair of spine-like posterior lobes having their bases located near each other ( Figs 63, 65, 66 ); epiproct and paraprocts more or less similar to those of E. (T.) ryabovi sp. n.; cerci rather long and thin, gradually thinning to acute apices, evenly arcuate as well as with apical parts directed medially and slightly downwards ( Figs 63, 65, 66 ); genital plate rather large, with posterior lobes slightly longer than half of this plate length, with notch between them narrowly angular in proximal part, and with most part of these lobes curved upwards and gradually narrowing to very narrowly rounded apices (these apices lacking any denticles or teeth; Figs 64–66, 68 ).

Variations. Paratypes with lobes of last tergite and of genital plate having less widely divergent apices (these lobes possibly more or less movable; Fig. 67 ).

Female unknown.

Length (in mm). Body 19–20; body with wings 43–46; pronotum 4.7–4.9; tegmina 36– 38; hind femora 18–19.5.

COMPARISON. The new species is most similar to E. (E.) nigrosignata in the shape of the male last tergite lobes and of the male cerci as well as in the structure of the male genital plate lobes, but it differs from this species in the space between the male last tergite lobes probably narrower (compare Figs 63, 66, 67 and 69 ), and the apical parts of the male genital plate lobes clearly narrower (see photographs of E. nigrosignata holotype in OSF). From all other species of this subgenus, E. (E.) carinata sp. n. is distinguished by the lobes of the male last tergite thinner (spine-like) and located more near each other, the male cerci with their distal parts not more strongly curved than the other parts, and the male genital plate lobes longer as well as with their curved upwards distal parts higher and medially or apically non-denticulated (vs. Figs 92, 94, 108–120, 123, 126–129, 132–134, 137).

ETYMOLOGY. The new species name is the Latin word “carinata ” (carinated, with keels) due to the keel-like dorsal parts of some tegminal veins.

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).

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).]