Beybienkoana trapeza, Liu, Hao-Yu & Shi, Fu-Ming, 2012

Liu, Hao-Yu & Shi, Fu-Ming, 2012, A contribution to the taxonomy of the genus Beybienkoana Gorochov (Orthoptera: Gryllidae: Euscyrtinae), Zootaxa 3174, pp. 59-64 : 60-62

1 Beybienkoana trapeza sp. nov.

Figs. 1 – 7

Description. Male. Head rather short ( Fig. 1 ), occiput distinctly convex. Scapus about twice as wide as frontal rostrum. Eyes round and distinctly projecting in lateral view. Frontal rostrum long, broad at base, narrowed apically, dorsal side covered with several short setae. Maxillary palpus short, apical joint widened and sloped at apex; apical joint of labial palpus short and clavate. Pronotum nearly rectangular, dorsal area with impressions, anterior margin slightly emarginated in middle, posterior margin sinuate, anterior angles slightly protruding and posterior angles distinctly protruding in dorsal view; lateral lobes longer than high. Metanotal gland developed, with 2 grooves on dorsal side, anterior one trapeziform, posterior one nearly round, subequal in size, both covered with short hairs ( Fig. 2 ). Tegmina narrow and short, not reaching apex of abdomen, dorsal field with 6 long and 2 short longitudinal veins and a few transverse veins; lateral field with 5 oblique subcostal veinlets, the second one branched in middle. Hind wings long, extending to middle of cerci. Fore tibia slightly swollen at base, external tympanum small and nearly round ( Fig. 3 ), internal tympanum large and oblong ( Fig. 4 ). Hind tibia with 6 spurs at apex, 3 of which on external side, very short and subequal in length, other 3 on internal side, upper one longest, middle one slightly longer than lower one.

Supra anal plate short, narrowed apically. Subgenital plate long, with lateral margins rolling upwards, nearly coniform. Cerci very long, about half length of body. Genitalia ( Figs. 5–7 ): epiphallus long, narrowed apically, apex distinctly bent dorsally and slightly concave with short hairs; epiphallic paramere short, with apex strongly sclerotized, and inner margin of ventral side with right-angled concave.

Coloration. Body yellow. Head with obscure light yellow longitudinal stripes on vertex and behind eyes; eyes brown. Lateral margins of disc of pronotum light yellow. Tegmina light gray.

Measurements (mm). Body length 16.0–17.0, length with wings 20.5–21.5, pronotum 1.2–1.4, tegmen 11.0– 11.8, hind femur 10.5–12.2.

Female. Unknown.

Type material. Holotype 3, CHINA, Hainan, Changjiang, Bawangling, 8–11.VII.2006, coll. Ji-Liang Wang & Chao Gao. Paratype 13, CHINA, Hainan, Lingshui, Diaoluoshan, 30.V.2010, coll. Ming Qiu & Rui-Lian Li.

Diagnosis. The new species is related to B. parvula Shi & Liu, 2007 , but differs from the latter by the large body; anterior groove of metanotal gland trapeziform; inner margin of ventral side of epiphallic paramere with right-angled concave at apex.

Etymology. The specific name is derived from Greek word “ trapez ”, referring to its anterior groove of metanotal gland being trapeziform.

Figures

FIGURES 1 – 7. Beybienkoana trapeza sp. nov. 1. head and pronotum, dorsal view; 2. metanotal gland, dorsal view; 3 – 4. fore tibia: 3. outer view; 4. inner view; 5 – 7. genitalia: 5. dorsal view; 6. ventral view; 7. lateral view. Scale bars = 1 mm.