Macromotettixoides longling Deng, 2016

Han, Yu-Peng, Li, Miao & Mao, Ben-Yong, 2020, A taxonomic study of the genus Macromotettixoides (Tetrigidae, Metrodorinae) with descriptions of two new species and two newly discovered males, Zootaxa 4718 (4), pp. 562-572 : 568-571

Macromotettixoides longling Deng, 2016

( Figs. 16–20 )

Apterotettix lativertex Zheng, Ou & Zhang 2012: 54 .

Macromotettixoides longling Deng, 2016: 159 ; Zha et al., 2017: 14.

Description. Male. Slightly smaller than female. Head. Head not exerted above the pronotal surface, surface covered with granules. Vertex uneven with paired fossulae, a little contracted forward in dorsal view, 1.5–1.6 times as wide as one eye; anterior margin nearly straight, slightly protruding beyond or being at the level anterior margin of eye; median carina conspicuous in anterior half and blurred in occiput; lateral carina folded upward; in profile, vertex together with frontal costa rounded; frontal costa nearly straight between lateral ocelli and arcuate between antennae, longitudinal furrow between antennae as wide as first segment of antennae. Antennae filiform, 15 segmented, middle segments 6.6–6.7 times as long as wide, situated between lower margins of eyes. Eyes globose. Lateral ocelli placed at middle of inner margins of eyes. Thorax. Pronotum broad and short, roof-like, disc covered with granules; midkeel entire, upper margin slightly elevated with swollen base before shoulder and straight behind shoulder in profile; anterior margin nearly straight; hind process reaching half of hind femur, apex acutely rounded or triangularly protruding; humeral angle obtusely angled; prozonal carinae slightly contracted backward; abbreviated carinae between shoulders expanded outwards; external lateral carina almost reaching 4/5 of lower margin of pronotum; lateral lobe of pronotum with posterior angle turning outwards, apex truncated, posterior margins with one concavity. Tegmina and alae extremely degenerated, both hidden beneath pronotum and externally invisible. The fore femur with upper lower edges nearly straight, 4.1 times as long as wide; mid femora with upper and lower edges nearly straight, 3.8–4.0 times as long as wide; hind femur 3.2–3.3 times as long as wide, antegenicular and genicular denticles acute, dorsal part of hind tibia with 7 outer and 5 inner teeth, first tarsal segment of hind legs 1.6 times as long as third one, three pulvilli larger in turn and with apexes obtuse. Abdomen. Epiproct narrowly triangular. Cerci with attenuated apex. Subgenital plate short cone-shaped, apex bifurcate. Coloration. General coloration of body brown. Hind femora with lower outside completely black. Hind tibiae light black with light rings in the middle and apex.

Female supplementary description. Vertex with anterior margin nearly straight or slightly arched, slightly protruding beyond anterior margin of eye; 1.5–1.7 (mean 1.6, n=4) times as wide as one eye. Antennae with middle segments 6.6–6.7 (mean 6.7, n=4) times as long as wide. Hind process reaching 1/2–3/5 of hind femora. The ratio of the length to width: fore femur 3.9–4.1 (mean 4.1, n=4), mid femur 4.2–4.6 (mean 4.4, n=4), hind femur 3.1–3.2 (mean 3.1, n=4). Other characters same as holotype.

Measurements (mm). Length of body: male 8.0–8.4, female 8.9–9.5; pronotum: male 5.0–5.4, female 5.6–5.9; antenna: male 3.1–3.2, female 3.1–3.4; hind femur: male 4.6–4.7, female 5.0–5.2.

Specimens examined. 4 females and 2 males, China, Yunnan, Longling , 24°31.48’N, 98°51.71’E, 1952 m alt, 18 Jul. 2018, coll. Ben-Yong MAO and Yu-Peng HAN .

Remark. Only the female holotype of the species was hitherto known. Four females and 2 males were collected from the type locality, Xiaoheishan Nature Reserve, Longling County, Yunnan, China in July 2018, and were confirmed to be conspecific with the female of M. longling , in spite of a few individual differences from holotype. Here, its male was described for the first time.

Distribution ( Fig. 21 ). The genus with its seventeen species is currently only represented in southern China, with populations in Yunnan, Sichuan, Guizhou, Guangxi, Guangdong, Hainan, Fujian, Taiwan, Jiangxi, Hunan and Hubei. All species have limited distributions, except M. zhengi , the most widespread species so far, distributed in Guangdong, Fujian and Jiangxi three Provinces, China. Although the genus may have a highly restricted distribution, it is not unlikely that additional species may occur in Southeast Asian side of the border with Yunnan and Guangxi. The species of the genus usually living in fallen leaves or tussock grass under subtropical or tropical evergreen broad-leaved forest, most of them with a small population and rare individual, it is not easy to obtain large samples for study.

Figures

FIGURE 21. Localities of the Macromotettixoides species (the species triplets in the map representing the following species: badagongshanensis, brachynota, cliva, curvimarginus, hainanensis, jinggangshanensis, jiuwanshanensis, lativertex, longling, parvula, taiwanensis, truncata, tuberculata, undulatifemura, wufengensis, wuyishana and zhengi).

FIGURES 16–20. Macromotettixoides longling Deng, 2016: 16-17 dorsal and lateral views of male body; 18 frontal view of male head; 19 left-lateral view of male hind tarsus; 20 lateral view of male terminalia. Scale bars 1 mm.