Filchnerella wuhaiensis, Cao & Li & Yin, 2018

Cao, Cheng-Quan, Li, Xin-Jiang & Yin, Zhan, 2018, A new species and key to all known species of the genus Filchnerella Karny, 1908 from China (Orthoptera: Acridoidea, Pamphagidae), Zootaxa 4413 (2), pp. 377-385 : 379-380

Filchnerella wuhaiensis sp. nov.

( Fig. 4 a – g )

Holotype: ♂, Wuhai, Inner Mongolia Autonomous Region , China, 39°36'N, 106°52'E, 1232 m, 2014-VIII-25, leg. Yong-Chao Zhi, Paratypes 4 ♂, 2 ♀, same as holotype . Collected from grassland of Inner Mongolia by insect net.

Male (fig.4 a – e) Body medium-sized (fig. 4 a). VerteX short, width between two eyes is about 4 times as wide as frontal ridge between bases of antennae; fastigial furrow present, dorsal side of head depressed, with granular and club-like projection; preocellar foveolae irregular. Frontal ridge distinct, with a groove along its whole length, between the bases of antennae slightly projecting forward, widened gently downwards, widen distinctly on base of labrum. Lateral facial carinae indistinct. Eyes small, near circle, vertical diameter shorter than subocular furrow.

Antennae long, 21 segments, length nearly equal to the total length of head and pronotum, length of a segment 2.1 times its width in the middle part. Pronotum rough, with short subuliform projection, anterior and posterior margin angled protruding; median carina elevated into lamellate, strongly incised on the posterior transverse sulcus; prozona higher than metazona, prozona 1.1 times metazona in length, median carina incised by the 2 transverse sulci in prozona, median carina of metazona arc-like raised. Prosternum with a strong lamellate process on anterior margin, having obvious emarginate in the middle. Interspace of mesosternum trapezoid, the narrowest 1.2 times length (fig.4 c). Tegmina reaching middle of fourth abdominal tergite, length 2.0 times maXimum width. Hind femur wide and compressed, length is about 3.4 times the width of broadest part; upper median carina of hind femur serrated, knee-lobe curved. Hind tibia with apical spine on inner and outer side, with 10 spines on eXternal side and 9 spines on internal side (fig.4 d). Arolium between claws of tarsus large, its apeX reaching to the middle of claws. Tympanum organ developed, tympanal aperture eXpanded, tympanic flap small. Krauss’s organ near oblong, with thinly rugose on surface. Abdomen with a row of tubercles in the middle. Epiproct near tongue-like, with longitudinal groove in the middle. Cercus long conical, curved inward. Subgenital plate short conical, apeX acute (fig.4 e). Epiphallus as in fig. 4 b.

Female (fig. 4 f, g) Body thick and larger than male. VerteX eXtremely wider, the width between two eyes is about 4.5 times as wide as frontal ridge between bases of antennae (fig. 4 g). Length of antennae shorter than the length of head and pronotum together. Tegmina lobi-form, dorsally widely separated, apeX eXtending over posterior margin of first abdominal tergite, slightly shorter than metazona of pronotum. Cercus short conical. Subgenital plate project at an angle in the middle of posterior margin. Ovipositor valves short, hooked, apeX acute, outer margin of lower valve with concave near the apeX (fig. 4 f).

Measurement (in mm) Length of body: ♂ 20.4 – 21.8, ♀ 28.8 – 29.6. Length of tegmina: ♂ 7.2 – 8.6, ♀ 5.1 – 5.9. Length of hind femur: ♂ 11.4 – 13.2, ♀ 14.9 – 15.5.

Coloration. Body filemot. Inner side of hind femur dark blue, lower margin not red, yellow in pregenicular, inner knee lobe black. Inner side of hind tibia red on the apical part, middle part dark blue and basal part yellowish brown.

The new species is allied to Filchnerella helanshanensis Zheng, 1992 . The major differences are in Table 1.

Etymology. The specific epithet is named after Wuhai, the type locality.

Figures

FIGURE 4 a–g. Filchnerella wuhaiensis sp. nov. a. Body in lateral view ♂; b. Epiphallus; c. Mesosternum ♂; d. Hind femur inner side ♂; e. End of abdomen in dorsal view ♂; f. Body in lateral view ♀; g. Head in frontal view ♀.