Alloteratura (Alloteratura) sagittala, Xin & Shi, 2019

Xin, Yarui & Shi, Fuming, 2019, Three new species of the genus Alloteratura Hebard, 1922 (Orthoptera: Tettigoniidae: Meconematinae: Meconematini) from China, Zootaxa 4651 (2), pp. 289-296 : 290-292

1. Alloteratura (Alloteratura) sagittala sp. nov.

( Fig. 1 )

Description. Male. Body small. Fastigium verticis conical, apex bluntly rounded. Eyes nearly globular, protruding forward. Apical segment of maxillary palpi shorter, about 1/4 length of subapical segment, apex enlarged ( Fig. 1C ). Anterior margin of pronotum nearly straight, posterior margin angularly rounded, lateral lobe longer than high; humeral sinus distinct ( Fig. 1B ). Thoracic foramen large, oval, exposed.

Tegmina long, surpassing apices of postfemora, anterior and posterior margins nearly parallel, apices angularly rounded. Hind wings slightly longer than tegmina.

All femora without spines on ventral surface, apices of genicular lobes of all femora obtusely rounded. Procoxae with 1 short spine, protibiae with 4 long spines on internal margin and 3 long spines on external margin of ventral surface while apical spines much shorter than subapical spines; tibial tympana open on both sides and oval. Mesotibiae with 4 long spines on internal margin and 3 long spines on external margin of ventral surface. Posttibiae with 26–32 spines on internal and external margins of dorsal surface separately, bearing 2 pairs of dorsal apical spurs and 1 pair of ventral apical spurs.

Tenth abdominal tergite nearly rectangle, the middle area of posterior margin with a shallow invagination ( Fig. 1D ). Cercus simple, stout, crossing each other, basal area stout, then gradually narrowing; the basal half on inner surface longitudinally concave, the apical half cylindrical and apex obtusely rounded. Epiphallus with basal area comparatively broader, then gradually narrowing, subapical area constricted; with lateral margin curved ventrally, longitudinally bulging dorsally, lateral margins extended slightly outward with apex bluntly rounded ( Fig. 1 D–F). Subgenital plate with basal area wider, nearly trapezoidal, the middle area of posterior margin with a rectangular notch; styli slightly long, conical, apices bluntly rounded, inserted on apical area on lateral margins of subgenital plate. ( Fig. 1G )

Colouration. Body yellowish green (probably green when alive). Eyes brown. Disc of pronotum with 1 pair of longitudinally yellow stripes. Spines of legs black brown.

Female. Unknown.

Material examined. Holotype: ♂, Taiping, Yingjiang , Yunnan, 14 August, 2013, coll. Jiao Jiao.

Measurements (mm). Body: ♂ 9.6; pronotum: ♂ 3.5; tegmina: ♂ 15.5; postfemora: ♂ 9.1.

Distribution. China (Yunnan).

Discussion. The new species slightly resembles Alloteratura hebardi Gorochov, 1998 , but differs from the latter in male by: the basal half of male cercus with inner margin longitudinally concave, the apical half cylindrical and apex obtusely rounded. Epiphallus with basal area comparatively wider, then gradually narrowing, subapical area constricted; with lateral margin curved ventrally, longitudinally bulged dorsally, lateral margins extended slightly outward with apices bluntly rounded.

Etymology. The name of new species is derived from morphology of epiphallus, Latin sagittal- means arrowshaped.

Figures

FIGURE 1. Alloteratura (Alloteratura) sagittala sp. nov., male: A–B. pronotum: A. dorsal view; B. lateral view; C. maxillary palpus in lateral view; D–F. apex of abdomen; D. dorsal view; E. ventral view; F. lateral view; G. subgenital plate in ventral view.