Holoarcus waigeoensis 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 : 24-25

Holoarcus waigeoensis Storozhenko , sp. n.

https://zoobank.org/NomenclaturalActs/ 5833A238-E45D-475D-9D48-09A307E7761C

Figs 1–4

MATERIAL. Holotype: ♀, Indonesia: Southwest Papua province, Raja Ampat Archipelago, Waigeo Island , Saporken village , 4–16 December 2017, leg. M. Mironov ( ZIN).

DESCRIPTION. Female. Body large sized for genus. Head in frontal view with vertex broadly rounded. Antennae filiform, apical segments broken. 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, 2.75 times as wide as width of the 1st antennal segment. Median carina of pronotum in profile high; dorsal line in the middle part almost straight; dorsal and posterior sides of the pronotum almost perpendicular; posterior part of the pronotum distinctly sinuate. Lower side of fore femur with two lappets, upper side straight. Upper and lower sides of mid femur almost straight. Fore femur 4.1 times, mid femur 5.3 times as long as wide. Hind femur 2.85 times as long as wide; upper side with 1-2 lappets; lower side unarmed. First tarsal segment of hind legs 2.5 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 3.4 times its maximum width; length of lower valve 4.6 times its maximum width.

General coloration of body brown with light brown marks. Face brown with small light spots; clypeus brown with narrow light stripes along anterior margin; labrum light brown with blackish base. Scapus and pedicel dark brown, other part of antenna light brown. Disc of pronotum dorsally brown; in lateral view, upper part of the pronotum brown with light brown vertical stripes; posterior part of the pronotum light brown with a few indistinct blackish spots. Fore and mid legs blackish brown. Basal half of hind femur blackish, apical half light brown. Hind tibia and tarsal segments brown. Sternal plate and sternites brown; subgenital plate blackish with light brown apex. Ovipositor light brown.

Male unknown.

MEASUREMENTS. Female: length of body 13.5; pronotum 17.5; fore femur 3.7; mid femur 5.3; hind femur 11.4; ovipositor 2.7 mm.

DIAGNOSIS. New species is similar to H. ferwillemsei but latter species is characterized by more large size (length of female pronotum 19–23 mm, length of hind femur 15–16 mm) and by arch-like elevated middle part of the pronotum ( Fig. 5 ).

DISTRIBUTION. Indonesia: endemic to Waigeo Island.

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

Figures

Figs 1–5. Holoarcus spp. 1–4 – H. waigeoensis sp. n., female holotype: 1 – body from right side, lateral view; 2 – same, from left side; 3 – same, dorsal view; 4 – head, frontal view; 5 – H. ferwillemsei, female, body from left side, lateral view (after Tumbrinck, 2014). Scale bars: 3 mm for figs 1–3, 5 and 1 mm for fig. 4.