Leptoderes dianensis, Wu & Liu, 2018

Wu, Chao & Liu, Chunxiang, 2018, Two new species of the genus Leptoderes Serville, 1838 (Orthoptera, Tettigoniidae) from China, Zootaxa 4497 (3), pp. 439-446 : 443-445

Leptoderes dianensis sp. nov

Type Material. Holotype: 1♂, China: Yuanan : Pu’er, Chashan Mt. N 22.7267°, E 100.9741° 1250m, 2017., Coll. Chao Wu, ( IZCAS).

Paratypes: 1♂, China: Yuanan : Mengla, Menglun. N 21.9662°, E 101.2047° 770m, 2013. VIII.10, Coll. Chao Wu, ( IZCAS) . 2♀, China: Yuanan : Mengla, Menglun. N 21.9662°, E 101.2047° 770m, 2013. VIII.10, Coll. Chao Wu, ( IZCAS)

Description. Male (holotype). Large-sized. Pronotum elongate and slightly broadened posteriorly, lateral lobe triangular, posterior margin with an indistinct broadly obtuse concavity. Anterior femur with 3 indistinct, small spines near apex on ventro-anterior margin; anterior tibiae with 4 sparsely-arranged small spines on ventro-anterior margin; anterior tibiae dorsally nearly flat, with tympanum conchate on both sides; broadened at and gradually constricted below tympana. Mid femur with 3 indistinct, small spines on ventro-anterior margin; mid tibiae with 6 small spines on ventro-anterior margin. Hind femur slender, arched, and over half length of tegmen, not reaching apex of tegmen at rest. Hind femur with 6–7 anterior spines on dorsal margins, and 2 spines near apex on ventroposterior margin; hind tibiae slender, longer than hind femur, with 9 anterior and 15 posterior spines on dorsal margins, with 8 anterior and 5 posterior spines on each ventral margin. Male stridulatory file length about 3.00– 3.05 mm. Male stridulatory file arched, symmetry; with densely packed stridulatory teeth; stridulatory file composed of about 65–72 widely arranged teeth, among which largest teeth are of equal size, gradually becoming smaller towards both ends, and tooth at apical one-sixth abruptly becoming larger and then becoming smaller apicad. Male right stridulatory area with distinct mirror. Epiproct simple, without specialization. Cerci longer, relative straight, densely hairy, with obtuse, granulated and verrucate apex. Subgenital plate elongate, triangular, with notch at apex, styli clavate.

Female similar to male. Cerci conical. Ovipositor strong, falcate, with distinct teeth only on apex of ventral margin.

Coloration. Generally yellowish green when alive. Body, pronotum, middle and hind legs, dorsal surface of abdomen and subgenital plate yellowish green. Head brown, with faint green dorsal surface. Antennae yellowish brown. Pronotum with an indistinct brown stripe along the lateral margin of pronotal disc. Brown fore leg, yellowish green middle and hind legs with numerous black spines. Tegmen yellowish green or brown, with some irregular brown blotches. Area of male left stridulatory file with a large black spot. Anal area of male left tegmen with a small black spot near apex. Hind wing translucent, lightly orange, with orange apex angle. Half of apex angle of hind wing black-ringed, and outer margin brownish red. Lateral surface of abdomen yellowish brown, with brown spiracles. Cerci yellowish green, with brown apex.

Measurements of Male and Female (mm). Length of body: ♂ 68.36, ♀ 68.55; length of pronotum: ♂ 9.57, ♀ 10.84; largest height of pronotum: ♂ 5.75, ♀ 5.81; length of tegmen: ♂ 47.36, ♀ 51.02; largest width of tegmen: ♂ 18.55, ♀ 21.97; length of hind wing: ♂ 52.36, ♀ 52.45; length of anterior femur: ♂ 8.04, ♀ 8.43; length of posterior femur: ♂ 22.28, ♀ 24.06; length of posterior tibiae: ♂ 23.08, ♀ 26.51.

Discussion. The new species is similar to L. shuzhenae sp. nov. in general appearance, but differs in its large size, elongate pronotum, narrow tegmen with few light blotches, shape and length of stridulatory file, and the very elongate and slender cerci.

Biology. The holotype was collected in shrubbery during daytime. We collected katydids of the same species at light for three days. The paratypes were obtained by chemically fogging the shrubs and trees. The altitude ranges from 750 to 1300 m.

The podiform eggs are black, flat and smooth, and without visible punctures.

Distribution. China, Yunnan-Pu’Er (1100m); Yunnan-Menglun (850m).

Etymology. The species is named after type locality, i.e., Yunnan, which Chinese simply call as Dian.