Sinocyrtaspiodea longicercus Shi & Bian

Ming, Shi Fu & Xun, Bian, 2013, One new genus and species of the tribe Meconematini (Orthoptera, Tettigoniidae) from Sichuan, China with description of the male sex and transfer of Acosmetura carinata Liu, Zhou & Bi, 2008 to the new genus, Zootaxa 3599 (4), pp. 390-394 : 391-392

Sinocyrtaspiodea longicercus Shi & Bian sp. nov.

( Fig. 1 )

Description. Male. Body small and stout. Head stout and short. Fastigium verticis conical, furrowed in midline, apex obtusely rounded. Eyes globular, protruding cephalad.

Pronotum obviously projecting caudad, transversal sulci indistinct, metazona slightly raised; anterior margin straight, posterior margin obtusely rounded; posterior area of lateral lobe slightly broadened, without humeral sinus.

All femora without spines on ventral margins. Procoxa with a spine, protibia with 3–4 spines on anterior margin of ventral surface, 4 spines on posterior margin, a pair of apical spurs on ventral surface; tibial tympana open on both sides, ovoid. Mesotibiae with 5 spines on anterior margin of ventral surface, 4 spines on posterior margin of ventral surface and a pair of apical spurs on ventral surface. Posttibia with 25–28 spines on inner and outer sides of dorsal surface, and a pair of dorsal apical spurs and two pairs of ventral apical spurs. Thoracic auditory spiracle free, ovoid.

Tegmina brachypterous, concealed beneath pronotum, with stridulatory vein, not surpassing posterior margin of pronotum; hind wings absent.

Posterior margin of tenth abdominal tergite with a deep notch, epiproct short and broad. Cerci cylindrical, hirsute; dorsal margin of subapical area concave, curved dorso-inwards; apices with a stout, short spine. Genitalia sclerotized, apical half narrow, posterior margin slightly concave. Basal area of subgenital plate comparatively broad, centre distinctly concave; apical area narrow, with a shallow notch. Styli stout and short, conical on apices of lateral margins.

Female. Pronotum short, reaching posterior margin of first abdominal tergite, or basal area of second abdominal tergite; posterior margin of lateral lobe narrowing; humeral sinus absent. Tegmina squamipterous, oval; hind wings absent. Posterior margin of ninth abdominal tergite slightly concave, the lateral margins lightly projecting backwards. Tenth abdominal tergite short, centre of posterior margin split. Epiproct tongue-shaped. Cercus straight, long, conical, apex obtuse. Ovipositor with basal area stout, middle area curved upwards; dorsal and ventral margins smooth, apex acute. Subgenital plate wide and large, slightly longer than broad, basal margin straight, apical area concave, or centre slightly prominent in some specimens.

Coloration. Body light yellowish brown, probably green when alive. Dorsum of head light brown, eyes yellowish brown. Disc of male pronotum with a longitudinal broad brown stripe, but middle area on metazona light; the stripe broadened caudad. Female pronotum with a narrow longitudinal brown stripe on disc, the lateral margins parallel, the outer margins with yellowish stripes. All tibial spines and spurs with apices brown, apical half of claws brown. Abdomen with a longitudinal brown stripe on dorsal area, reaching posterior margin of tenth abdominal tergite.

Type material. Holotype, 3, Jiulaodong, Emeishan, Sichuan, China, 4 August, 2011, collected by Shi Fu Ming and Zhao Le Hong. Paratypes, 132Ƥ, the other data as holotype.

Measurements (mm). Body: 3 9.0–10.5, Ƥ 10.4–10.7; pronotum; 3 5.8–6.2, Ƥ 4.0–4.7; postfemora: 3 9.5–9.7, Ƥ 10.8–11.0; ovipositor: 5.2–6.0.

Etymology. The name of the new species is derived from Latin ‘ long ’ and ‘ cercus ’, showing male cercus morphology.

Discussion. The new species resembles Sinocyrtaspiodea carinata ( Liu, Zhou & Bi, 2008) , but it differs from the latter in: male tenth abdominal tergite short, centre of posterior margin split. Epiproct tongue-shaped; cercus, long, apex with a stout short spine. Female subgenital plate large, long slightly more than broad, basal margin straight, apical area concave, or centre slightly prominent in some specimens.

Figures

FIGURE 1. Sinocyrtaspiodea longicercus sp. nov.: A, F. pronotum in dorsal view; B, G. pronotum in lateral view; C. apex of abdomen in dorsal view; D, H. apex of abdomen in lateral view; E, I. subgenital plate in ventral view; A – E. male, F – I. female.