Xistra cambodia Storozhenko, 2021

Storozhenko, S. Yu., 2021, A new species of the genus Xistra Bolívar, 1887 (Orthoptera: Tetrigidae) from Cambodia, Far Eastern Entomologist 430, pp. 1-6 : 2-5

Xistra cambodia Storozhenko , sp. n.

http://zoobank.org/NomenclaturalActs/ C4A203D6-D6F6-416B-A91A-139F89A15208

Figs 1–9

MATERIAL. Holotype: ♀, Cambodia: southern part of Elephant Mountains ,

Phom-Bokor Mt. , Bokor Nat. Park, 700–1000 m, 18–22.IX 2003, leg. A. Gorochov and M. Berezin ( ZIN). Patartype: ♂, same data as for holotype ( ZIN) .

DESCRIPTION. Female. Body medium-sized for genus. Head in frontal view with vertex forming V-shaped shallow concavity. Antennae filiform, 15-segmented,

1.8 times as long as fore femur; middle segments (7–9th) 5–7 times as long as wide.

Antennal sockets situated between lower margins of eyes. Eyes distinctly protruding above pronotum in lateral view; in dorsal view one eye 1.3 times as wide as vertex. Lateral ocelli situated at the lower one-third of eyes. Width of frontal ridge near the base of the antennae considerably narrower than width of the 1st

antennal segment. Median carina of pronotum in profile low, distinctly sinuate in anterior part, straight in posterior part; posterior process of pronotum long, almost reaching the apex of hind tarsi. Prozonal carinae parallel-side; prozona transverse.

Disc of pronotum depressed between prozona and humeral angles and concave behind apex of tegmina, with weak interhumeral carina. Lower side of lateral lobes pronotum in dorsal view oblique truncated. Tegmina ovate, with broadly rounded apex; visible part of tegmen 2.7 times as long as wide; width of visible part of tegmen 1.4 times width of mid femur.

lateral view; 2 – the same, dorsal view; 3 – male, lateral view; 4 – the same, dorsal view.

Scale = 1 mm.

Hind wing almost reaching apex of posterior process of pronotum. Upper and lower sides of fore and mid femora straight. Fore femur 4.8 times, mid femur 5 times as long as wide. Hind femur 3.9 times as long as wide. First tarsal segment of hind leg view; 6 – female head and anterior part of pronotum, dorsal view; 7 – ovipositor, lateral view; 8 – female apex of abdomen, ventral view; 9 – male head, frontal view. Scale = 1 mm.

as long as 3rd segment (without claws); ventral side of 1st segment with 3 subequal and distinctly pointed pads. Epiproct triangular, with pointed apex. Subgenital plate subsquare; posterior side of plate strongly triangular near middle. Cerci conical, with pointed apices. Valves of ovipositor narrow, dentate; length of upper valve 4.3 times its maximum width; length of lower valve 5 times its maximum width.

General coloration of body blackish brow with light brown marks. Face brown.

Antennae brown. Disc of pronotum blackish brown; lower part of lateral lobes of pronotum light brown. Visible part of tegmina blackish with light brown veinlets.

Anterior margin of hind wings black. Fore and mid femora black with small light marks. Fore and middle tibiae black with pale apical rings. Hind femur blackish with light brown marks. Hind tibia blackish, with 2 light brown rings. First tarsal segment of hind leg pale brown, 2nd segment and apex of 3rd segment black.

Sternal plate and sternites black; subgenital plate black with light brown apex.

Ovipositor light brown.

Male. Similar to female but smaller. Antennae filiform, 13-segmented, 1.9 times as long as fore femur; middle segments (7–9th) 7.2–7.4 times as long as wide. One eye from above 1.3 times as wide as vertex. Frontal ridge near the base of antennae considerably narrower than width of the 1st antennal segment. Visible part of tegmen 2.6 times as long as wide and 1.3 times as wide as mid femur. Fore femur

5.2 times, mid femur 5.3 times, and hind femur 4.1 times as long as wide. First

Tarsal segments of hind leg as in female. Subgenital plate conical.

General coloration of body as in female but face black. Sternal plate, sternites and subgenital plate shiny black.

MEASUREMENTS (in mm). Length body: ♀ 7.6, ♂ 7.1; antenna: ♀ 4.4, ♂ 4.0;

pronotum: ♀ 15.3, ♂ 12.1; tegmen: ♀ 1.9, ♂ 1.3; fore femur: ♀ 2.4, ♂ 2.1; mid femur: ♀ 2.5, ♂ 2.1; hind femur: ♀ 6.6, ♂ 5.7; ovipositor 1.4 mm.

DIAGNOSIS. New species is most similar to X. angusta and X. strictivertex in the shape of pronotum, very narrow frontal ridge, and V-shaped vertex, but differs from both by parallel prozonal carinae and slender hind femur (in X. angusta, the prozonal carinae constricted inwards and hind femur 2.8 times as long as wide; in X.

strictivertex, carinae constricted backward and hind femur 3.5 times as long as wide).

DISTRIBUTION. Cambodia: Elephant Mountains (= Dâmrei Mountains).

ETYMOLOGY. The new species is named after the type locality.

Figures

Figs 1–4. Xistra cambodia sp. n., habitus (1, 2 – holotype; 3, 4 – paratype). 1 – female,

Figs 5–9. Xistra cambodia sp. n. (5–8 – holotype; 9 – paratype). 5 – female head, frontal