Macromotettixoides yingjiangensis, Fan & Li & Mao, 2023

Fan, Cheng-Mei, Li, Miao & Mao, Ben-Yong, 2023, Descriptions on two new species of the genus Macromotettixoides (Orthoptera Tetrigidae: Metrodorinae) from China, Zootaxa 5306 (1), pp. 127-134 : 131-133

2. Macromotettixoides yingjiangensis sp. nov. ( Fig. 2 : A–J)

Description. Female. Body size small, surface densely covered with numerous small granules. ( Fig. 2A ).

Head. Head not exserted above the level of anterior margin of pronotum. In dorsal view, vertex broad, 1.4–1.5 times as wide as one eye, with paired fossulae; anterior margin straight and slightly protruding before anterior margin of eyes; lateral carinae folded upward and slightly surpassing upper margin of eye, retrad reaching supraocular lobes; median carina conspicuous and erected in anterior half, secondary carinae distinct and Xshaped ( Fig. 2A ). In lateral view, vertex finely exserted above the level of upper margin of eyes; frontal costa visible before eyes and together with medial carina of vertex nearly roundly; fascial carina slightly concave between lateral ocelli and protruding arcuately between antennal grooves ( Fig. 2B–C ). In frontal view, frontal costa bifurcated above lateral ocelli, longitudinal furrow downwards expanded; width of longitudinal furrow of frontal ridge narrower than antennal groove diameter; lateral ocelli placed at middle of inner margins of eyes ( Fig. 2D ). Antennae filiform, inserted between lower margin of eyes, 15 segments, 8th–11th segments longest and 9.1–10.3 times as long as wide. Eyes globose, slightly lower than the top of vertex and anterior margin of the pronotum.

Thorax. Pronotum tectiform, slightly roof-shaped. In dorsal view, disc very coarse and uneven, covered with granules and tubercula; anterior margin straight; lateral carinae of prozona parallel and erected; mid-keel entire and thick; humeral angle obtuse angled, with parallel interhumeral carinae; internal lateral carinae distinct and whole; hind process of pronotum short and broad, the caudal pronotum gradually sharpened, apex obtusely pointed, reaching the 7/10 of hind femur or base of supra-anal plate ( Fig. 2A ). In lateral view, upper margin of pronotum elevated before shoulder and slightly undulate behind shoulder; median carina of pronotum high and elevated with swollen base before shoulder and undulated behind shoulder in profile; lateral lobe of pronotum with posterior angle turning downwards, apex truncated, posterior margins of lateral lobes of pronotum with one concavity. Tegmina and hind wings extremely degenerated, both hidden beneath pronotum and externally invisible ( Fig. 2B–C ). Fore and middle femora with margins finely serrated; fore femur with lower edge almost straight or finely undulate, 3.8 times as long as wide; middle femur with lower edge slightly undulated, 3.8 times as long as wide ( Fig. 2E–F ). Hind femur stout, 2.5–2.6 times as long as wide, with carinae and margins finely serrated, antegenicular denticle acute and genicular denticle nearly right angled. Hind tibia with 6–7 spines on outer side, 4–5 spines on inner side; first tarsal segment 1.6 times as long as the third one, first tarsal segment with first pulvillus as long as second one, third pulvillus longest, all apexes nearly rectangular ( Fig. 2G–H ).

Abdomen. Ovipositor narrow and long, upper valve 3.5 times as long as wide, upper margin of upper valvula and lower margin of lower valvula armed with strong and sparse saw-like teeth. Length of subgenital plate longer than its width, hind margin straight with a strongly triangular protection in the middle ( Fig. 2I–J ).

Coloration. Body dark brown; antennae light brown. Hind femur dark brown, but the outside of lower side black; hind tibia light brown.

Male. Unknow.

Measurements. Length of body ♀ 9.5–9.8 mm; length of pronotum ♀ 6.4–6.7 mm; length of hind femur ♀ 5.5–5.7 mm.

Type material. Holotype. ♀, China: Yunnan, Dehong, Yingjiang , 24°39’ N, 97°35’ E, alt. 674 m, 2-Ⅹ-2018, leg. Yu-Peng Han. Paratype. ♀, 24°37’ N, 97°38’ E, alt. 1379 m, 3-Ⅹ-2018, leg. Meng-Qi Wang, other data same as holotype. Type specimens are deposited in the BMDU .

Diagnosis. The new species is similar to M. daiyunshanensis Deng, 2020 , but differs from the latter by: 1) upper margin of pronotum elevated before shoulder and slightly undulate behind shoulder (nearly straight in the latter); 2) hind process of pronotum short and broad, apex narrowly rounded (the caudal pronotum suddenly become fine and its apex truncate); 3) lateral carinae of prozona parallel (constricted backwards in the latter); 4) pronotum with internal lateral carina whole (interrupted by the shoulder in the latter).

The new species is also similar to M. longling Deng, 2016 , but differs from the latter by: 1) secondary carinae of vertex distinct and X-shaped (blurry in the latter); 2) upper margin of pronotum elevated before shoulder and slightly undulate behind shoulder (nearly straight in the latter); 3) lateral carinae of prozona parallel (constricted backwards in the latter); 4) interhumeral carinae parallel (expanded backwards in the latter); 5) internal lateral carina of pronotum distinct and whole (indistinct and interrupted in the latter); 6) pronotum distally sharpened gradually, apex narrowly rounded (pronotum distally sharpened suddenly, apex sharply pointed in the latter).

Etymology. The specific epithet indicates the type locality Yingjiang County, Yunnan Province.

Distribution. China (Yunnan).

Figures

FIGURE 2. A–J. Macromotettixoides yingjiangensis sp. nov. A–C. female habitus, dorsal, dorsolateral and lateral views; D. Head, frontal view; E–G. Left fore, middle and hind femora, lateral view; H. Left hind tibia, lateral view; I–J. Female subgenital plate and ovipositor, lateral and ventral views. Scale bar = 1 mm.