Alloteratura (Alloteratura) dahilayan Gorochov, sp. n.

https://zoobank.org/NomenclaturalActs/ A54BE491-D100-49A5-8EDB-87356E832A53

Figs 18–23, 41–44

MATERIAL. Holotype – ♂, Philippines: Mindanao I., ~ 150 km NNW of Dabaw City, environs of Dahilayan Adventure Park, 8°11′38′′ N, 124°51′39′′ E, h= 1000–1500 m, primary/secondary forest, on leaf of bush at night, 2–9.II.2024, A. Gorochov, M. Omelko, I. Naumenko (ZIN). Paratypes: 2 ♀, same data as for holotype (ZIN).

DESCRIPTION. Male (holotype). Body coloration yellowish with following marks: eyes brown; antennal flagellum with moderately numerous and small as well as light brown to brown spots; tegmina with transparent membranes in tegminal stridulatory apparatus, light brown area on distal half of this apparatus in left (upper) tegmen, very light brown stripe along anal edge of each tegmen behind above-mentioned apparatus; hind wings with all membranes transparent; legs also with very light brown both tympanic membranes, but hind tibia with light brown to brown spines, and each tarsus with third segment having somewhat darkened marks on lateral lobes (Figs 18–20). Head and pronotum typical of this subgenus: upper rostral tubercle slightly projected before marginal keels of antennal cavities but rounded at apex, flattened dorsally and with distinct thin median (longitudinal) groove on dorsum (this tubercle slightly widening to basal part, but distance between antennal cavities almost as wide as in D. (N.) laosi sp. n.); lower rostral tubercle undeveloped; eyes slightly longitudinal (Figs 18–20); pronotum as in Figs 19 and 20 (its posterior part not completely covering stridulatory apparatus of tegmina). Wings slightly shortened (somewhat shorter than in D. laosi sp. n. and D. sjostedti); apices of hind wings reaching tegminal apices; tegminal stridulatory apparatus as in Fig. 19; tegminal apices narrowly rounded; tegminal RS with normal base and 2–3 branches in distal part; legs long and thin, but hind femur with distinctly thickened proximal half and without acute apical spinules. Abdomen with all tergites unspecialized, but last one with wide but moderately deep and approximately obtuse-angled posteromedian notch; cerci almost sickle-shaped, dorsoventrally compressed and with acute apices; epiproct and paraprocts lobule-like, small and very small, respectively; subanal plate rather large, almost triangular, with strongly concave lateral sides, with rather narrow and apically slightly widened median lobe having apical part barely bifurcated, and with lateral parts articulated with last tergite posteroventral parts; genital plate with distal part narrowing to rounded but hardly bilobed apical portion, and with a pair of thin and moderately short styles on ventral surface of this portion (Figs 41–43); genitalia with almost V-shaped but reversed semimembranous plate having posterior parts curved aside (dorsally, this plate almost completely covered by rather numerous but moderately small spinules) (Fig. 23).

Female. General appearance as in male, but eyes often dark brown, tympanic membranes sometimes brown, tegmina without darkened marks or with only very light brown stripe along each anal edge, tegminal stridulatory apparatus undeveloped, last tergite somewhat smaller and almost truncated apically, cerci smaller and almost cylindrical but clearly curved upwards; genital plate and ovipositor as in Figs 22, 44.

Length (in mm). Body: male 8, female 8.2–8.5; body with wings: male 13.5, female 14.5– 14.7; pronotum: male 3.8, female 3.5–3.6; tegmina: male 10.4, female 11.5–11.8; hind femora: male 8, female 8.5–8.7; ovipositor 5.6–5.7.

COMPARISON. The new species is more or less similar to A. (A.) triloba (Karny, 1920) from Malay Peninsula in the shape of the male subanal plate, but this plate in the new species is distinctly narrower in its posteromedian part. From other philippinean species, the new one is distinguished by the following characters: from A. (A.) bakeri Hebard, 1922 (Mindanao I.), A. (A.) xiphidiopsis (Karny, 1920) (Luzon I.) and A. (A.) plauta Jin, 1995 (Negros I.), by the male cerci much thinner; from A. (A.) simplex (Karny, 1920) (Luzon I.), by the male subanal plate longer and clearly narrower in its posteromedian part; from A. (A.) longicauda (Karny, 1924) (Mindanao I.), by shorter wings and ovipositor. And from all other congeners belonging to this subgenus or having unclear subgeneric position, the new species differs in the same characters and/or in the male subanal plate apically slightly bifurcated (not spinelike).

ETYMOLOGY. The new species is named after Dahilayan Adventure Park placed very near its type locality.