Xizicus (Paraxizicus) furcistylus, Feng, Jiyuan, Chang, Yanlin & Shi, Fuming, 2016

Feng, Jiyuan, Chang, Yanlin & Shi, Fuming, 2016, A revision of the subgenus Xizicus (Paraxizicus) Liu, 2004 (Orthoptera: Tettigoniidae: Meconematinae), Zootaxa 4138 (3), pp. 570-576 : 571-573

Xizicus (Paraxizicus) furcistylus sp. nov.

(Map. 1, Fig. 1 )

http://lsid.speciesfile.org/urn:lsid: Orthoptera .speciesfile.org:TaxonName:478775

Material examined. Holotype: ♂, Tongdao, Hunan, China, 26 July, 2004, collected by Jian-Feng Wang and Ji- Liang Wang. Paratypes: 3♂ 2♀, Tongdao, Hunan, China, 25–26 July, 2004, collected by Jian-Feng Wang and Ji- Liang Wang. The type material is deposited in the Museum of Hebei University.

Description. Male. Body small. Fastigium verticis conical, apex blunt, furrowed on the middle of disc. Pronotum slightly elongate, anterior margin straight, posterior margin rounded, hind transversal sulcus conspicuous; lateral lobe longer than high, ventral margin backwards oblique, humeral sinus very weak. All femora unarmed, fore coxa with a spine, tibial tympana open on both sides, fore tibia with 5 spines on internal and 6 spines on external margins of ventral surface; mid tibia with 5 spines on internal and 6 spines on external margins of ventral surface; hind tibia with 29–31 dorsal spines on each margin, 1 pair of dorsal apical spurs and 2 pairs of ventral apical spurs.

Tegmina long and narrow, apices rounded, surpassing genicular lobes of hind femora, hind wings longer than tegmina.

Posterior margin of tenth abdominal tergite with a pair of long and stout processes, the processes separated from each other at the subbase, each process dorso-ventrally expanded, divided into two compressed and apically rounded branches. Basal half of cerci cylindrical, with a small ventro-external process, apex rounded; apical half of cerci divided into two branches, dorsal branch compressed and wide, slightly incurved, apex rounded; ventral branch narrower and longer than dorsal branch, slightly compressed, apex subacute. Genitalia with a pair of incurved membranous lobes, apices rounded. Subgenital plate long and stout, upcurved, the middle area in the midline of ventral surface longitudinally broadly raised ventrally, the apex with a pair of stout spines; subapices of lateral margins slightly expanded, with a pair of thin spines directing backwards; posterior margin of subgenital plate concave in the middle, with a bunch of hairs; styli located on the middle of lateral margins, slender and comparatively long, slightly compressed.

Female. Tenth abdominal tergite small, posterior margin with a extremely small triangular notch in the middle. Cerci conical and stout, apices acute. Subgenital plate with base wide, posterior margin rounded, centre with a notch (the specimens are a little deformed). Ovipositor long and nearly straight, apical half upcurved, ventral valve with an apical hook.

Coloration. Body yellowish brown. Eyes brown. Dorsal surface of head with 4 longitudinal dark brown stripes, 2 stripes near the midline converged at vertex, 2 stripes near the lateral margin reaching internal margins of eyes; the 1–3 basal segments of antenna darkish brown, other part with darkish brown rings. Disc of pronotum with a broad longitudinal brown stripe, the lateral margins dark brown. Spines on ventral surface of fore and mid tibiae dark brown, apices of genicular lobes of hind femora dark. Tegmina bearing distinct brown spots. Processes and posterior margin of male tenth abdominal tergite dark brown. Apices of spines on male subgenital plate brown.

Measurements (mm). Body: ♂ 10.3–11.6, ♀ 9.9–11.5; pronotum: ♂ 3.8–4.1, ♀ 3.5–3.6; tegmen: ♂ 17.4–18.2, ♀ 17.7; hind femur: ♂ 11.2–11.8, ♀ 11.1–11.4; ovipositor: 7.7–7.9.

Discussion. The new species differs from Xizicus (Paraxizicus) biprocerus ( Shi & Zheng, 1996) by: processes of male tenth abdominal tergite dorso-ventrally expanded, apex of each process divided into two compressed branches; the middle area in the midline of ventral surface of subgenital plate longitudinally broadly raised ventrally, the apex with a pair of stout spines; subapices of lateral margins of subgenital plate slightly expanded, with a pair of thin spines directing posteriorly.

Etymology. The name of the new species is derived from the morphology of the male tenth abdominal tergite.

Distribution. China (Hunan).

Figures

FIGURE 1. Xizicus (Paraxizicus) furcistylus sp. nov.: male: a. pronotum in lateral view; b – c, e. apex of abdomen: b. dorsal view; c. ventral view; e. lateral view; d. head and pronotum in dorsal view; f. subgenital plate in lateral view; female: g. ovipositor in lateral view; h. subgenital plate in ventral view.