Gorochovius furvus, Ma & Ma, 2019

Ma, Libin & Ma, Ge, 2019, The second species of the genus Gorochovius Xie, Zheng & Li, 2004 (Orthoptera: Phalangopsidae: Phaloriinae) discovered from China, Zootaxa 4671 (2), pp. 259-266 : 260-263

Gorochovius furvus sp. nov.

( Tab. 1 ; figs 1, 2A, 3A, 3C, 3E, 3G, 4A, 5A)

Materials examined. China: Holotype. Male, Guangxi, Shiwandashan, Fulong , 2019-v-11, coll. Zhang, Tao.

Paratypes. 3 males, Guangxi, Shiwandashan , 2019-v-11, coll. Ma, Libin and Zhang, Tao ; female, Guangxi, Shi- wandashan, 2019-v-11, coll. Ma, Libin and Zhang, Tao.

Measurements. Male (n=4): BL 21.05±0.65, HL 2.23±0.07, PL 3.14±0.09, PW 4.98±0.09, FWL 16.15±0.64, FWW 9.23±0.65, MTL 7.04±0.45, HFL 13.53±0.58; female (n=1): BL 18.59, HL 2.21, PL 2.98, PW 4.17, FWL 13.14, MTL 6.75, HFL 14.11, OL 8.25.

Etymology. The specific epithet ‘ furvus’ refers to the new species being much darker than G. trinervus .

Diagnosis. Male. Body dark, pubescent, but hairs short and rendering body slightly shining. Pronotal anterior margin obviously narrower than the posterior. Tegmen broad, but not as wide as in G. trinervus . Epiphallic lateral lobe short and greatly rounded in lateral view, conspicuously armed with dorsal denticles apically. Caudal view of ectoparamere possessing dorsal potion truncate and somewhat rectangular. Female. Dorsal valve of ovipositor armed with obtuse tooth.

Description. Male. Body length about two centimeters. Head and pronotum very small, but forewings large and broad, and the widest as triple width as head. Head as long as broad. Frons produced, as high as vertex and occiput, elongate and with similar width to antennal scape. Frons somewhat rectangular with straight apical margin in dorsal view. Eyes rather convex, somewhat triangle-like, with external portions ball-like and internally truncate. Face broad and flat, except convex lower frons. Clypeus almost flat, slightly and medially concave. Labrum shieldlike, with straight apical margin. The fifth maxillary palpus conspicuously longer than the total length of the second and the third, and apically expanding, shaped as a hoof and with rounded apical margin. The third labial palpus expanding, somewhat triangular and longer than the total length of others. Pronotal anterior margin much narrower than posterior, slightly concave and the posterior margin truncate. Pronotal disc flat with fine central sulcus; lateral lobe posteriorly concave and possessing rounded margin. Tegmen large and broad, with the widest portion around mirror; tegmen membranous, but the basal and chordal areas leathery; false veins wrinkled and between oblique veins and mirror veins and mirror; oblique vein numbered “Seven”; diagonal vein branching proximally, two dividing veins in mirror; apical field possessing four rows of transverse cells. Hind wings much longer than abdomen, but covered by tegmen. Abdomen short, with abdominal tip reaching the middle of femur. Cercus thin and long, uncovered portion as long as tegmen. Legs elongate. Fore tibia shorter than femur; median tibia longer than femur, hind tibia equal to femur. Portions around tympana laterally flattened. Both inner and outer tympana oval-like and almost sized similarly; 2/5 apical portions of hind femur rather thin. Hind tibia armed with four inner and outer subapical spurs respectively; each point of external subapical spurs located higher than the internal, and external spurs shorter than the internal; subapical spurs ventrally possessing a row of hairs, thin and long. First hind tarsus dorsally armed with two rows of fine denticles; claws simple, proximally expanded and armed with a short hair. Genitalia. Epiphallic lateral lobes short and stick-like, dorsoventrally arcuate in lateral view, and conspicu- ously possessing denticles along dorsal margin apically ( Fig. 3C ). Ectoparamere half ring-like in caudal view, with top portions convex and truncate, somewhat rectangular ( Fig. 3G ). Coloration. Body colored from brown to dark brown, ornamented with golden pubescence. Vertex brown, ornamented with four dark stripes and the middle two apically branching. Pronotum dark brown, and slightly light centrally, and ornamented with a pair of rounded light patches. Leathery portions of tegmen dark brown, with remainders colored yellow brown or brown. Legs, especially femurs, light alternating with dark.

Calling song. Stridulation rapid, about six echemes in a second, and duration (0.086±0.005) and interval (0.166±0.011) are short. Songs slightly higher, peak frequency is 3460 Hz. There are seven homophonics in each echeme.

Female. The posterior portion of pronotum not broader than anterior portion; pronotal posterior margin convex. Tegmen slightly longer than abdomen and conspicuously shorter than hind wings. Primary longitudinal veins oblique and sparse, and several irregular cells in them. Ovipositor short and slightly projecting beyond hind wings. Top valve of ovipositor armed with dull tooth, and lower valve short and without obvious lateral teeth ( Fig. 4A ).

Remarks. Numbers of oblique vein variable, always from six to seven, as well as, dividing veins varied from two to three. The new species is more or less shining, with pubescence obviously shorter than what of G. trinervus . And it is darker than the known one. Genitalia of the new species is short, with epiphallic lateral lobe much rounded in lateral view, and armed with dorsal denticles apically. But epiphallic lateral lobe is long in G. trinervus , which is somewhat straight at bottom, and without obviously dorsal denticles. Ovipositor top valve of the new is armed with dull tooth while what of G. trinervus are sharp.

Figures

FIGURE 3. Genitalia of Gorochovius species. A, C, E, G. G. furvus; B, D, F, H. G. trinervus. A, B. dorsal view; C, D. lateral view; E, F. ventral view; G, H. caudal view.

FIGURE 4. Ovipositor of Gorochovius species. A. G. furvus; B. G. trinervus.