Lamellitettigodes diversifemoris Lu & Zha, 2020

Lu, Yong-Zhong & Zha, Ling-Sheng, 2020, A new species of the genus Lamellitettigodes (Orthoptera: Tetrigidae) from PR China, with taxonomic notes on the genus, Zootaxa 4851 (2), pp. 338-348 : 340-342

Lamellitettigodes diversifemoris Lu & Zha sp. n.

Figs. 1-2

urn:lsid:zoobank.org:act:C4D1F7B9-00B2-4979-B45E-F271A2F860AB

Material examined. Holotype—female, PR China: Hainan Province /Island, Ledong County, Jianfengling National Forest Park, 18°44′10.07′′N, 108°52′6.86′′E, 830 m, 12 September 2018, coll. Yongzhong Lu and Lingsheng Zha. Paratypes: 2 males and 2 females, 750-850 m, 11-13 September 2018, other data same as holotype .

Description. Female.

General appearance. Body slender (relatively bulky for Lamellitettigodes ) and size moderate, surface relatively smooth, but with numerous fine granules. Body grayish brown to dark brown, generally maculated with many yellowish brown spots; antennae brown and color of terminal segments darker; pronotum behind shoulders generally has a pair of large, black and conspicuous spots; hind wings grayish brown; spots on fore and mid femora indistinct, hind femur often has a very large yellowish brown spot, fore and mid tibiae have three yellowish brown rings each, hind tibia mainly brown and the rings indistinct.

Head. Vertex slightly lower than anterior margin of pronotum, gradually and slightly narrowing forwards, equal to one eye in width; anterior margin straight, finely serrated, slightly surpasses the level of anterior margin of eyes, anterior part a little higher than posterior part; lateral carinae conspicuous, horn-like upwards and a little higher than the top of eyes, in dorsal view and in frontal view are both L-shape; medial carina clear, erect and straight, nearly extends to occiput, much lower than lateral carinae; fossulae deep and elongate, nearly extends to the end of medial carina. In lateral view face slightly oblique; medial carina together with frontal costa nearly right angled which is clearly visible before eyes; fascial carinae nearly straight above superior ocelli and then broadly and weakly arcuate forwards between antennal grooves, margin of fascial carinae slightly finely serrated. In frontal view, bifurcation of frontal costa located at the middle of between anterior margin of vertex and upper margin of superior ocelli; superior ocelli small, distance between anterior margin of vertex and upper margin of superior ocelli two times as long as one superior ocellus; longitudinal furrow deep and narrow, long triangular, between grooves 0.8 time as wide as the diameter of scapus. Antenna filiform and thin, 16-segmented, inserted between the lower margin of eyes, the 9 th segment longest and about 9 times as long as wide, terminal two segments very short (15-segmented and the 8 th segment longest in males). Eyes globose, slightly higher than the anterior margin of pronotum, elevated indistinctly; superior ocelli placed at the middle of the inner margins of eyes.

Pronotum. Pronotum compressed in the anterior part (before the end of tegmina), while the posterior part stands on nearly the same level. Anterior margin obtusely angled forwards, between shoulders slightly uplifted while behind shoulders a little concave. Prozonal carinae erect, low, slightly shortened and slightly contracted backwards, extralateral carinae straight and lower, both nearly but not reach anterior sulcus; median carina conspicuous, erect and entire, lamellate before the end of tegmina and then gradually lowering backwards; humero-apical carina and lateral carina slightly erect and with finely serrated margins. In lateral view, upper margin before the end of tegmina wholly arcuate, highest at the level of posterior sulcus, the posterior part nearly straight. Humeral angles obtusely angled; hind process elongate and wedged, reaches about the middle of hind tibiae, apex nearly truncated. Posterior angle of lateral lobe of pronotum extending obliquely, backwards and downwards, anterior margin finely serrated, apex rounded and a little folded outward; ventral sinus and tegminal sinus conspicuous, both nearly right angled.

Wings. Visible part of tegmen long and oval, slightly wider than mid femur, apex rounded; hind wing extremely developed, surpasses hind pronotal process about 2.5 mm.

Legs. Dorsal and ventral margins of all femora finely serrated, dorsal and ventral margins of fore and mid femora nearly straight (a little undulated which are all indistinct), ventral margins of fore and mid femora have sparse white hairs; mid femur compressed indistinct, basal part a little wider than terminal part; hind femur 3 times as long as wide, ventral margin entire, dorsal margin before antegenicular tooth has a small tooth which is very indistinct, antegenicular tooth and genicular tooth a little sharp. Hind tibia has finely serrated inner margins, terminal part slightly wider than basal part, outer/inner side has 5-8 spines; the first segment of hind tarsus 1.3 times longer than the third, the third pulvillus longest while the first shortest, all apices sharp.

Abdomen. Ovipositor: upper valva wide and short, about 2.4 times as long as wide (not including the length of the stipe, same as below), widest at the basal one-third; outer margins of upper and lower valvae has small, obtuse and saw-like teeth. Subgenital plate: its width slightly longer its length, medial carina entire, posterior margin truncated and, in the middle, has an acutely triangular protrusion.

Male. Slightly thinner and smaller than female. Mid femur clearly wider than the visible part of tegmen, and basal part wider and thicker than terminal part. Subgenital plate short cone-shape, apex obliquely truncated and bifurcate. Other characters same as female.

Measurements (in mm). Length of body: male 6.7-6.8, female 9-9.5; length of pronotum: male 9.5-9.8, female 9.8-10.2; length of hind femur: male 4.8-5, female 5-5.4; length of antenna: male 3.8-4, female 4.2-4.5.

Distribution. PR China (Hainan Province).

Diagnosis. Lamellitettigodes diversifemoris sp. n. is similar to L. cultratus ( Bolívar, 1898) from New Guinea, Biak, and the Bismarck Archipelago (New Britain and New Ireland) ( Tumbrinck, 2019), but the latter: antennae much shorter, only 1.3 times as long as fore femur; prozonal carinae strongly contracted backwards; and hind pronotal process much longer, surpasses apices of hind tibiae.

Etymology. The specific epithet ‘ diversifemoris ’ is derived from the combination of two Latin words in genitive case, (1) adjective diversus, diversa, diversum (different) and (2) noun femur, femoris (femur), pointing to the mid femora which are distinctly different in male and female.

Notes. The new species is also similar to Euparatettix bimaculatus Zheng, 1993 which is widely distributed in Zhejiang, Fujian, Guizhou, Guangxi and Hainan, PR China, but the latter has lower lateral carinae of vertex, truncated anterior margin of pronotum, and narrow upper valva of female ovipositor (3-3.5 times as long as wide) ( Zheng, 1993; 2005). The description and drawings of Eu. bimaculatus ( Zheng, 1993; 2005) match the character of Lamellitettigodes ; together with its similarity to L. diversifemoris sp. n., herein we transfer it to Lamellitettigodes . Thus, Lamellitettigodes bimaculatus ( Zheng, 1993) comb. nov. becomes a new combination of Euparatettix bimaculatus Zheng, 1993 .

Figures

FIGURE 1. Lamellitettigodes diversifemoris sp. n. a) lateral view of female body; b) dorsal view of female body; c) frontal view of female face; d) lateral view of female ovipositor; e) ventral view of female subgenital plate; f) lateral view of male subgenital plate. Scale bars a, b 2 mm, c–f 1 mm. Pictures a–c were stacked using Photoshop CS6.

FIGURE 2. Lamellitettigodes diversifemoris sp. n., male. a) lateral view of body; b) dorsal view of body. Scale bars 2 mm. Pictures were stacked using Photoshop CS6.