Machaerotypus stigmosus Li & Chen 2022, sp. nov.
Creators: name: Li, Feng-E.
name: Yang, Lin
name: Long, Jian-Kun
name: Chang, Zhi-Min
name: Chen, Xiang-Sheng
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Membracidae
Machaerotypus
Machaerotypus stigmosus

description: Machaerotypus stigmosus Li & Chen sp. nov.
urn:lsid:zoobank.org:act: 60892F20-5E1B-4F61-BDCE-9B010ADAB636
Figs 1–4, 7, 8H
Diagnosis
Forewing dark brown with indistinct transverse white stripes (Figs 1E–F, 2A–B), half of anterior surface and margin densely clothed with coarse denticulation; aedeagal shaft with tiny dorsal hump at base (Fig. 3E), dorsal margin dentate in distal half; second valvulae with broad dorsal hump on basal half (Fig. 4E).
Etymology
The word ‘ stigmosus ’ is a Latinized adjective derived from the Greek word ‘stigma’ (spot), referring to the forewing with many spots.
Material examined
Holotype CHINA • ♂; Guizhou Province, Dafang County; 27°19′ N, 105°61′ E; 8 Mar. 2019; Xiu-Dong Huang leg.; collected with yellow pan traps; IEGU.
Paratypes CHINA • 23 ♂♂, 5 ♀♀; same collection data as for holotype; IEGU.
Description
MEASUREMENTS. Male (n = 24) body length: 4.7–5.1 mm, forewing length: 3.9–4.0 mm, width between humeral angle apices: 1.5–2.1 mm, width between suprahumeral horn apices: 1.5–1.9 mm. Female (n = 5) body length: 5.2–5.3 mm, forewing length: 4.2–4.6 mm, width between humeral angle apices: 2.2–2.3 mm, width between suprahumeral horn apices: 1.6–1.8 mm.
COLORATION. Brown. Male slightly darker than female overall. With the following parts black: head, pronotal callosity, femur and tarsal claws (female lighter), posterior pronotal process apical half except tip. Forewing veins brown with black on a few veins, pattern black, and brown brindle, with indistinct transverse white medial band; female with more extensive brown markings than male (Fig. 1). Abdomen black, with base of each segment narrowly yellow-white.
HEAD AND THORAX. Vertex with dorsal margin trapezoidal, ocelli slightly closer to inner margin of eyes than to each other; frontoclypeus more than two-thirds length of vertex ventral margins, apex expanded (Fig. 1C–D), frontoclypeal lobes distinct, length more than half as long as frontoclypeus. Pronotum with punctures evenly distributed. Callosity nearly triangular, with sparse setae, surface smooth. Suprahumeral horns short. Posterior pronotal process ending at anal angle of forewing at rest, depressed at base, strongly expanded near middle in lateral view (Fig. 1E–F). Basal fourth of forewing punctate with opaque sclerotization, veins M and Cu fused on the first brown brindle area, veins M+Cu and R fused at center of opaque sclerotization (Fig. 2A–B).
MALE GENITALIA. Pygofer with dorsal margin slightly convex in lateral view, sternite IX longer than wide in lateral view (Fig. 3A). Lateral plate upper half narrow and pointed, depressed slightly on bottom half, with setae on margin (Fig. 3G). Basal half of subgenital plate fused (Fig. 3D). Style clasp angled dorsally; distally recurved, distal half slender, dorsal surface with setae; connective n-shaped (Fig. 3A, F). Aedeagus in lateral view U-shaped, shaft with slight convexity near base, tapered distally with coarse denticles in distal half of dorsal margin; gonopore oblong, preapical on posterior surface (Fig. 3B, E).
FEMALE GENITALIA. Sternite VII in ventral view with posterior margin deeply concave, both sides with setae (Fig. 4C). Pygofer longer than wide in lateral view with numerous setae; drop-shaped in ventral view (Fig. 4A–B). First valvulae gradually narrowed and tapered to acute apex (Fig. 4D). Second valvulae gradually widened from base to near midlength with slight dorsal hump near base, distal half of dorsal margin irregularly and finely dentate, apex bluntly pointed (Fig. 4E). Third valvulae (gonoplac) broadly rounded distally, ventral margin with numerous setae (Fig. 4F).
Distribution
China (Guizhou) (Fig. 7).
Remarks
This species is similar to M. sibiricus (Lethierry, 1876), but differs from the latter as follows: 1) forewing with many spots and brown wide stripe (hyaline in M. sibiricus); 2) posterior pronotal process depressed at base, strongly expanded near midlength (flat a base and center in M. sibiricus); 3) ocelli slightly closer to inner margin of eyes than to each other (equidistant in M. sibiricus).
description: Published as part of Li, Feng-E., Yang, Lin, Long, Jian-Kun, Chang, Zhi-Min & Chen, Xiang-Sheng, 2022, Two new species of the treehopper genus Machaerotypus Uhler, 1896 from China (Hemiptera: Membracidae: Centrotinae), pp. 64-79 in European Journal of Taxonomy 826 (1) on pages 67-72, DOI: 10.5852/ejt.2022.826.1835, http://zenodo.org/record/6761661