Rhicnogryllus xuandan He, 2021

Liu, Yi-Jiao & He, Zhu-Qing, 2021, Two new species of the genus Rhicnogryllus Chopard, 1925 from Hainan, China (Orthoptera: Trigonidiidae: Trigonidiinae), Zootaxa 5048 (4), pp. 594-598 : 595-596

Rhicnogryllus xuandan He sp. nov. 玄丹fldzä

Fig. 1A&B , 2A–F

Holotype: male, CHINA, Hainan, Baoting, Xian’anshilin (E 109.43 N 18.60), 22-iii-2019, coll. He Zhu-Qing.

Paratypes: 4 males and 7 females, same data as holotype .

COI gene sequences: OK047283 & OK047284 from the holotype and one paratype .

Description. Male. Head: little wider than pronotum, vertex not flattened, with a few strong long setae, frontal rostrum almost as wide as antennal scape, apical segment of maxillary palpi truncated ( Fig. 2C ). Pronotum: pubescent, anterior margin almost straight while posterior margin little convex, legs pubescent ( Fig. 2A ), tympanum absent, hind tibia with three pairs of dorsal spurs and three pairs of apical spurs (outer ones small with the middle one longest, dorsal and middle inner ones long). Tegmen coriaceous, almost extending to apex of abdomen. Genitalia: ectophallic apodeme slender and shaped into acute angle, ramus straight, pseudepiphallus separated into two lateral parts joined by a straight wide but feebly sclerotized bridge, posterior apex of pseudepiphallus forming flattened lophi with serrated inner margins, pseudepiphallic parameres triangular, nearly 2/3 of epiphallus apical lobes but wider and smoother than pseudepiphallus ( Fig. 2D, E ).

Female. Similar to male ( Fig. 2B ), ovipositor little curved ( Fig. 2F ), finely denticulate on dorsal side (1/2 of total length) and ventral side (1/5 of total length).

Coloration. Overall light yellow and black. Brownish red in head and anterior part of pronotum. Cerci yellow and ovipositor dark brown in ventral side.

Measurement (mm). Male: SZ 4.60–5.16, PR 0.96–1.07, HF 4.55–4.61; Female: SZ 4.62–5.07, PR 0.82– 1.02, HF 4.09–4.31, OV 1.83–1.98.

Distribution. China (Hainan).

Etymology. The specific epithet xuandan is for the Chinese phonetic alphabet 玄丹, which is for black and red color, respectively.

Figures

FIGURE 1. Rhicnogryllus spp. in life. A. R. xuandan male, B. R. xuandan female, C. R. fallax male, D. R. fallax female (photos by He Zhu-Qing).

FIGURE 2. Morphological features of Rhicnogryllus xuandan sp. nov. A, dorsal view of male; B, dorsal view of female; C, front view of face; D, male genitalia in dorsal view; E, male genitalia in ventral view; F, ovipositor.