Holoarcus tumbrincki Storozhenko, 2024

Storozhenko, S. Yu., 2024, NEW AND LITTLE-KNOWN SPECIES OF THE GENUS HOLOARCUS (ORTHOPTERA: TETRIGIDAE) FROM INDONESIA, Far Eastern Entomologist 498, pp. 23-28 : 25-27

Holoarcus tumbrincki Storozhenko , sp. n.

https://zoobank.org/NomenclaturalActs/ 26FE7598-EB97-4A38-9447-E3FB208CB4C5

Figs 6–8

MATERIAL. Holotype: ♀, Indonesia: Southwest Papua province, env. of Manokwari City , primary forest on hills near sea, 4–6 November 2004, leg. A. Gorochov ( ZIN). Paratypes: 2 ♂, 2 ♀, same data as for holotype ( ZIN) .

DESCRIPTION. Female. Body small sized for genus. Head in frontal view with vertex broadly rounded. Antennae filiform, 13-14 segmented. Antennal sockets situated slightly below lower margins of eyes. Eyes large. Lateral ocelli situated at the lower one-third of eyes. Width of frontal ridge near the base of the antennae broad, 2.8–3.0 times as wide as width of the 1st antennal segment. Median carina of pronotum in profile high; dorsal line in the middle part weakly rounded; dorsal and posterior sides of the pronotum rounded; posterior part of the pronotum distinctly sinuate. Lower side of fore femur with two lappets, upper side straight. Upper side of mid femur almost straight, lower side sinuate. Fore femur 4.1–4.2 times, mid femur 4 times as long as wide. Hind femur 2.7 times as long as wide; upper side with one lappet; lower side unarmed. First tarsal segment of hind 2.9 times as long as 3rd segment (without claws); ventral side of 1st segment with 3 subequal and distinctly pointed pads. Subgenital plate subsquare; posterior side of the plate weakly triangular near middle. Cerci conical, with pointed apices. Valves of ovipositor narrow, dentate; length of upper valve 3.5–4 times its maximum width; length of lower valve 4.5–4.8 times its maximum width.

General coloration of body light brown with black marks. Face brown with light and black marks; clypeus brown with light spots along anterior margin; labrum blackish brown. Antennae light brown. Pronotum, in lateral view, light brown with numerous black spots. Fore and mid legs black with small brownish spots. Hind femur brown with black spots. Hind tibia and tarsal segments brown. Sternal plate, sternites and subgenital plate brown. Ovipositor light brown.

Male. Similar to female but smaller. Width of frontal ridge near the base of the antennae 2.9–3.0 times as wide as width of the 1st antennal segment. Fore femur 3.7 times, mid femur 3.7–3.9 times as long as wide. Hind femur 2.5–2.6 times as long as wide; upper side with 1–2 small lappets; lower side unarmed. Subgenital plate ventrally triangle, apex weakly excised. General coloration of body light brown; black marks indistinct. Face brown with light and black marks; clypeus brown; labrum light brown. Antennae light brown. Pronotum, in lateral view, light brown with small black spots. Fore and mid femora black; fore and mid tibia brown. Hind femur brown without black spots. Hind tibia and tarsal segments brown. Sternal plate, sternites and subgenital plate brown.

MEASUREMENTS. Length body: ♀ 13.3–13.4, ♂ 10.9–11.1; pronotum: ♀ 14.6–15.1, ♂ 12.2–12.5; fore femur: ♀ 3.2–3.3, ♂ 2.6; mid femur: ♀ 3.6–3.7, ♂ 3.1–3.3; hind femur: ♀ 9.6–10.1, ♂ 8.0–8.1; ovipositor 2.2–2.4 mm.

DIAGNOSIS. Holoarcus tumbrincki sp. n. is most similar to H. belingae but differs from latter by shape and color of the pronotum. In H. belingae , in lateral view, dorsal and posterior sides of the pronotum are almost perpendicular and pronotum dark brown, without black spots and stripes ( Fig. 9 ).

DISTRIBUTION. Indonesia: Southwest Papua province.

ETYMOLOGY. The new species is named in honor of German entomologist Dr. Josef Tumbrinck.

NEW RECORDS

Figures

Figs 6–11. Holoarcus spp. 6–8 – H. tumbrinski sp. n.: 6 – female holotype, body from left side, lateral view; 7 – male paratype, body from left side, lateral view; 8 – female head, frontal view; 9 – H. belingae, male (Papua-New Guinea: Madang City), body from left side, lateral view; 10, 11 – H. intermedius, female: 10 – body from left side, lateral view; 11 – head, frontal view. Scale bars: 3 mm for figs 6, 7, 9, 10 and 1 mm for figs 8, 11.