Bolivaritettix similis Storozhenko, 2018

Storozhenko, Sergey Yu., 2018, Pygmy grasshoppers (Orthoptera: Tetrigidae) of Vietnam: the genus Bolivaritettix Günther, 1939, Zootaxa 4374 (4), pp. 497-523 : 518-520

Bolivaritettix similis Storozhenko , sp. nov. Figs 4 , 13 , 59–65

Material examined. Holotype—female, Vietnam: Gia Lai Province, 20 km N Kannak, Buon Luoi , 15–19 November 1993, coll. A.V. Gorochov ( ZISP). Paratypes: 2 females, same data as for holotype ; 1 female, the same locality, 22–31 March 1995, coll. A.V. Gorochov ; 1 female, the same locality, 1 April 1995, coll. A.V. Gorochov ; 1 female, the same locality, 1–10 May 1995, coll. A.V. Gorochov ; 1 female, Gia Lai Province, 40 km N Kannak, Tram Lap , 20–24 April 1995, coll. A.V. Gorochov ; 1 male, 1 female, Kon Tum Province, Kon Plong District, vill. Xa Hieu, commune Kon Plinh , 14o36’ N, 108o29’ E, 950 m, 15–23 June 2014, coll. L.K. Johansen and N.L. Orlov ( ZISP). (Altogether 5 females and 1 male) .

Description. Female. Body small-sized for this genus. Antennae filiform, 16-segmented, 1.7–1.9 times as long as fore femur; middle segments (seventh–ninth) 6.5–7.5 times as long as wide. Antennal grooves situated between lower third of eyes. Fastigium of vertex 1.3–1.5 times as wide as one compound eye seen from above; anterior margin of vertex straight, reaching the frontal line of eyes; lateral margins of vertex almost parallel; median carina of fastigium distinct; transverse carinae not reaching anteriorly the median carina; supraocular lobes narrow; fossulae deep. Compound eyes not elevated above pronotum in lateral view. Lateral ocelli situated between upper thirds of eyes. Frontal ridge in lateral view broadly rounded between eyes and gently excised below median ocellus; in frontal view, this ridge gently diverging downwards and narrow (first antennal segment 1.2–1.3 times as wide as ridge near the base of antennae). Pronotum in dorsal view with almost truncated anterior margin; posterior process of pronotum short, not reaching apex of hind femora for 1.2–1.4 mm. Disc of pronotum behind the shoulders without depressions; posterior process of pronotum with numerous tubercles and short longitudinal ridges; apex of this process narrowly rounded. Lateral sides of shoulders rounded in dorsal view. Median carina of pronotum in profile low and sinuate. Prozonal carinae well defined, constricted backwards; prozona transverse, 1.2–1.4 times as long as wide. Humero-apical carinae distinct; interhumeral carinae short. Tegminal sinus deep; lower part of lateral lobe of pronotum in dorsal view forming triangle lobule. Infrascapular area short. Tegmina narrow with broadly rounded apex; visible part of tegmen 2.7–2.8 times as long as wide; this part of tegmen 0.8– 0.9 times as wide as mid femur. Hind wings short, not reaching the apex of posterior process of pronotum by 1.3– 1.4 mm. Fore femur 3.8–4.2 times, mid femur 3.9–4 times as long as wide; upper and lower side of fore and mid femora almost straight. Hind femur 3–3.1 times as long as wide. Upper side of hind tibia with 7–8 outer and 5–6 inner spines, with margins finely serrated. First tarsal segment of hind leg 1.2–1.3 times as long as third one; ventral side of first tarsal segment with three pads, two basal pads short triangular, apical pad distinctly longer than other pads; third tarsal segment not swollen. Epiproct triangular, with pointed apex. Subgenital plate 1.2–1.3 times as long as wide; posterior margin of plate broadly rounded and with angular posterior process near middle. Cerci conical, with rounded apices, 2–2.1 times as long as wide near cercal base. Valves of ovipositor narrow, dentate; length of upper valve 3.7–3.8 times as great as its maximum width; length of lower valve 5.2–5.4 times as great as its maximum width.

General colouration of body brown. Head brown; eyes dark brown; antennae brown with blackish apex. Disc of pronotum and lateral lobes brown, sometimes with light brown small marks. Tegmina and hind wings dark brown. Fore and mid femora brown with or without black rings. Fore and mid tibia black with 3 narrow light rings. Hind femora brown with small black marks; the ventral external area black. Hind tibiae blackish brown. Fore and mid legs with tarsal segments black, but the base of second segment brown; hind legs with light brown tarsal segments, but second segment and apex of third segments dark brown. Dorsal side of tergites brown, lateral sides black. Epiproct and cerci blackish. Sternites and subgenital plate light brown. Ovipositor brown.

Variability. One female paratype collected together with holotype 15–19 XI 1993 is forma macroptera (or macronota). It is characterized by long posterior process of pronotum surpassing the apex of hind femora by 1.7 mm and by hind wings surpass apex of posterior process of pronotum on 1.8 mm. All other specific characters are as in holotype.

Male. General appearance similar to that of female. Antennae 15-segmented; 1.8 times as long as fore femur; middle segments 7–7.5 times as long as wide. Fastigium of vertex 1.2 times as wide as one compound eye seen from above; carinae of vertex as in female. First antennal segment 1.25 times as wide as ridge near the base of antennae. Pronotum as in female. Tegmina narrow; visible part of tegmen 2.5 times as long as wide; this part of tegmen 0.9 times as wide as mid femur. Hind wings not reaching the apex of posterior process of pronotum by 1.1 mm. Legs as in female. Epiproct triangular, with pointed apex. Subgenital plate 1.2 times as long as wide; its apex excised. Cerci as in female.

General colouration of body as in female, but legs more contrast coloured. Epiproct, subgenital plate and cerci light brown.

Measurements (mm). Body: male 8.5, female 9.1–10.5; pronotum: male 8.2, female 8.5–9.5 (in forma macronota 10.4); antenna: male 3.4, female 3.5–3.6; tegmen male 1.5, female 1.4; fore femur: male 1.9, female 1.9–2.1; mid femur: male 2.2, female 2.2–2.4; hind femur: male 6.2, female 6.2–6.5; ovipositor 1.3–1.4.

Distribution. Vietnam (provinces Gia Lai and Kon Tum).

Comparison. The new species is most similar to B. celaenotus in the shape of frontal ridge, position of antennal grooves and narrow tegmina, but differs from the latter by broad fastigium of vertex, by tuberculated surface of pronotum, and by narrow hind femur which 3–3.1 times as long as wide (in B. celaenotus , fastigium of vertex as wide as one compound eye, surface of pronotum finely serrated and hind femur stout, 2.7–2.8 times as long as wide). The new species is also similar to B. brachynotus Zheng, 2003 and B. fanjingshanensis Zheng, 1992 from southern China. New species differs from former in the shape of lateral carinae in the prozona and short hind wings (in B. brachynotus , the prozonal carinae parallel and hind wings almost reaching the apex of pronotum) and from the latter species in the shape of lower part of lateral lobe of pronotum (in B. fanjingshanensis , the lower part of lateral lobe of pronotum forming an obliquely truncate lobule).

Etymology. This species name is the Latin adjective “ similis ” (similar).

Remarks. In 2013, I wrongly identified the male of this new species from southern Vietnam (Park Kattien = Dong Nai Province, Cat Tien National Park, 22–24 November 2007, coll. A.A. Polilov) as Bolivaritettix chinensis . Therefore the vibrational signals of B. chinensis described by Benediktov (2013) undoubtedly belong to B. similis sp. nov.

Figures

FIGURES 1–4. Bolivaritettix, female head and anterior part of pronotum, lateral view. 1, B. sculptus; 2, B. chinensis; 3, B. anaglypticussp. nov.; 4, B. similis sp. nov. Scale bars 1 mm.

FIGURES 5–13. Bolivaritettix, head and anterior part of pronotum, dorsal view. 5, B. sculptus, female; 6, B. vietnamensis. sp. nov., female; 7, B. chinensis, female; 8, B. humeralis, female; 9, B. anaglypticus sp. nov., female; 10, B. constrictus sp. nov., male; 11, B. abruptus sp. nov., female; 12, B. celaenotus, female; 13, B. similis sp. nov., female Scale bars 1 mm.

FIGURES 59–65. Bolivaritettix similis sp. nov. 59, female body, lateral view; 60, the same, dorsal view; 61, female head, frontal view; 62, female apex of abdomen, ventral view; 63, male body, lateral view; 64, the same, dorsal view; 65, male apex of abdomen,ventral view.