Machaerotypus stigmosus Li & Chen, 2022

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), European Journal of Taxonomy 826 (1), pp. 64-79 : 67-72

publication ID	https://doi.org/ 10.5852/ejt.2022.826.1835
publication LSID	lsid:zoobank.org:pub:F07F64FD-B25B-4E96-B926-0D15437433D6
DOI	https://doi.org/10.5281/zenodo.6761738
persistent identifier	https://treatment.plazi.org/id/60892F20-5E1B-4F61-BDCE-9B010ADAB636
taxon LSID	lsid:zoobank.org:act:60892F20-5E1B-4F61-BDCE-9B010ADAB636
treatment provided by	Felipe
scientific name	Machaerotypus stigmosus Li & Chen
status	sp. nov.

Treatment

Machaerotypus stigmosus Li & Chen sp. nov.

urn:lsid:zoobank.org:act:60892F20-5E1B-4F61-BDCE-9B010ADAB636

Figs 1–4 View Fig View Fig View Fig View Fig , 7 View Fig , 8H View Fig

Diagnosis

Forewing dark brown with indistinct transverse white stripes ( Figs 1E–F View Fig , 2A–B View Fig ), half of anterior surface and margin densely clothed with coarse denticulation; aedeagal shaft with tiny dorsal hump at base ( Fig. 3E View Fig ), dorsal margin dentate in distal half; second valvulae with broad dorsal hump on basal half ( Fig. 4E View Fig ).

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 View Fig ). 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 View Fig ), 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 View Fig ). 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 View Fig ).

MALE GENITALIA. Pygofer with dorsal margin slightly convex in lateral view, sternite IX longer than wide in lateral view ( Fig. 3A View Fig ). Lateral plate upper half narrow and pointed, depressed slightly on bottom half, with setae on margin ( Fig. 3G View Fig ). Basal half of subgenital plate fused ( Fig. 3D View Fig ). Style clasp angled dorsally; distally recurved, distal half slender, dorsal surface with setae; connective n-shaped ( Fig. 3A, F View Fig ). 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 View Fig ).

FEMALE GENITALIA. Sternite VII in ventral view with posterior margin deeply concave, both sides with setae ( Fig. 4C View Fig ). Pygofer longer than wide in lateral view with numerous setae; drop-shaped in ventral view ( Fig. 4A–B View Fig ). First valvulae gradually narrowed and tapered to acute apex ( Fig. 4D View Fig ). 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 View Fig ). Third valvulae (gonoplac) broadly rounded distally, ventral margin with numerous setae ( Fig. 4F View Fig ).

Distribution

China (Guizhou) ( Fig. 7 View Fig ).

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 ).