Hirrius kitangladensis Storozhenko, 2025

Storozhenko, Sergey Yu., 2025, New and little known pygmy grasshoppers (Orthoptera: Tetrigidae) from the Philippines, Zootaxa 5661 (3), pp. 351-366 : 355-356

Hirrius kitangladensis Storozhenko , sp. nov.

Figs 5–14

Material examined. Holotype — ♀, Philippines: Mindanao Island , Mount Kitanglad Range Natural Park, 8.18°N, 124.94°E, h= 1400 m, 27.01.2024, leg. M.M. Omelko ( ZIN) . Paratype: 1 ♂, the same locality and collector as for holotype but 05.02.2024 ( ZIN) .

Diagnosis. The differences of a new species from other congeners are given in a key above.

Description. Female (holotype). Body medium-size for genus. Antennae with 12 black antennomeres: 1st massive scapus, it width 2.2 times more than width of frontal ridge near the base of antennae; 2nd short pedicel; 3–6th antennomeres robust and shorter than the central segments; 7–8th antennomeres elongated; 9th and 10th antennomeres flattened, 2.3–2.4 times as long as wide; apical segments fused and small. Length of antenna 2 times longer than length of fore femur. Eyes globose, in lateral view the upper margin of the eye not elevated above the pronotum. In dorsal view, vertex not projecting before the eyes, its width between eyes 1.4 times wider than width of an eye. Lateral carinae of the vertex not elevated above the eyes; medial carina of the vertex weak in the apical fourth. Frontal costa short, reaching the mid ocellus only. Lateral ocelli and bifurcation of frontal costa situated in the upper fourth of the compound eyes height. Dorsal margin of the antennal groove placed above the lower margin of compound eyes. Pronotum covering the whole abdomen, dorsally finely granulated. Anterior margin of pronotum truncated; median carina of pronotum low, almost straight in profile; prozonal carinae distinct, convergent; hind margin of lateral lobe of the pronotum without tegminal (upper) sinus; lower sinus deep; lower part of lateral lobe directed outwards, with obliquely truncate apex; infrascapular area narrow, lower margin of area straight. Tegmina and hind wings absent. Upper and lower carinae of fore and mid femora finely serrated; fore femur 5.6 times, mid femur 5.1 times as long as wide. Hind femur stout, 2.6 times as long as wide; upper and lower carinae finely dentate. Upper side of hind tibia with 3 outer and 4 inner teeth. First tarsal segment of hind legs as long as 3rd segment (without claws), ventrally with 3 pulvilli almost equal in length. Subgenital plate as long as wide, with triangle posterior margin. Cerci conical with tapered apex. Ovipositor elongated and strongly armed by teeth and strong setae. Upper valvulae wider in lateral view than the lower ones. Upper valve of ovipositor 3.7 times longer than its maximum width; lower valve 5.2 times longer than its maximum width.

Body blackish brown. Head brown; labrum black; maxillary palps light brown with blackish marks; eyes whitish. Antennae black. Dorsal side of the pronotum yellowish-brown with narrow black stripe along the median carina and wide black band between the bases of hind femora. Lateral lobes of pronotum blackish. Fore and mid legs black. Hind femora blackish brown with light marks. Hind tibiae black with light brown dorsal side. Hind tarsi black. Basal abdominal tergites black, apical tergites light brown. Sternal plate and abdominal sternites blackish brown; subgenital plate black. Ovipositor black.

Male (paratype). Similar to female but smaller. Antennae 12-segmented, 9th and 10th antennomeres flattened, 2.7 and 3.0 times as long as wide, respectively. Length of antenna 2.5 times longer than length of fore femur. Fastigium of vertex 1.7 times wider than width of one eye from above. Frontal ridge narrow. Pronotum as in female. Fore femur 2.7 times, mid femur 2.6 times, hind femur 3.45 times as long as wide. For and mid femora 5.0 times, hind femur 2.7 times as long as wide. Epiproct narrow triangular, with pointed apex. Subgenital plate in lateral view triangle. Body colored as in female but antennae blackish brown, dorsal side of the pronotum in anterior part light brown and in apical part blackish brown; lateral lobes of the pronotum light brown. Subgenital plate, 9th abdominal sternite and cerci blackish.

Measurements (in mm). Length of body (from frontal ridge to apex of subgenital plate) male 7.5, female 9.3; pronotum male 7.0, female 9.4; antenna male 4.9, female 5.6; fore femur male 2.1, female 2.8; mid femur male 2.0, female 2.6; hind femur male 4.6, female 5.5; ovipositor 1.3.

Distribution. Philippines: Mindanao Island.

Etymology. The species name refers to the type locality, Kitanglad Mountain.

Figures

FIGURES 5–14. Hirrius kitangladensis sp. nov., female holotype (5–10) and male paratype (11–14). 5, 11. Body, dorsal view; 6, 12. Body, lateral view; 7, 13. Head, frontal view; 8, 14. Anterior part of body, dorsal view; 9. Apex of abdomen, lateral view; 10. The same, ventral view.