Amphinemura bimaculata, Li, Weihai, Wang, Ying & Yang, Ding, 2016

Li, Weihai, Wang, Ying & Yang, Ding, 2016, Two new species of Amphinemura (Plecoptera: Nemouridae) from the Gaoligong Mountains of Yunnan, China, Zootaxa 4200 (3), pp. 381-388 : 383-387

publication ID	https://doi.org/ 10.11646/zootaxa.4200.3.3
publication LSID	lsid:zoobank.org:pub:9B6B3CD3-EF8D-47DC-A82D-2325C943F26B
DOI	https://doi.org/10.5281/zenodo.6074292
persistent identifier	https://treatment.plazi.org/id/03D6878E-3719-2258-FF3D-5C9BD71AFE7F
treatment provided by	Plazi
scientific name	Amphinemura bimaculata
status	sp. nov.

Treatment

Amphinemura bimaculata View in CoL sp. nov.

( Figs. 2 View FIGURE 2 , 3 View FIGURE 3 b, 4d–h)

Adult habitus ( Fig. 3 View FIGURE 3 b). General color brown to dark brown. Head brown with large black area anterior of posterior ocelli, a trapezoid dark brown patch extending to posterior margin of occiput, a slender transverse strip present between these two pigmented areas ( Fig. 4 View FIGURE 4. a – c d). Pronotum brown with pale lateral fields and margins and Tshaped medline, surrounding a pair of large irregular dark areas, the pigmentation covering ca. ¾ of the entire disc, contacting dark anterior margin and ending just before pale posterior margin ( Fig. 4 View FIGURE 4. a – c d). Wings pale with dark veins. Legs brownish. Abdominal terga brown, terminalia darker.

Male. Forewing length 6.7–7.0 mm, hind wing length 5.6–5.8 mm. Tergum VIII membranous medially, with two lateral bands, heavy sclerotized at anterior margin, each band about 1/3 width of the tergum. Tergum IX weakly sclerotized but median portion heavier so, median portion with broad anterior and posterior indentations; two groups of long paramedial bristles present along posterior margin ( Figs. 2 View FIGURE 2 a, 4e). Vesicle of sternum IX claviform, parallel-sided at most length with medial constriction in dorsal view, apical half enlarged in lateral view ( Figs. 2 View FIGURE 2 b, 2c). Hypoproct trapezoidal basally, gradually narrowed toward usual tubular tip, apex with an additional nipple-like up-curved extension lobe ( Figs. 2 View FIGURE 2 c, 2g). Tergum X forming a sclerotized plate except the medial concavity ( Fig. 4 View FIGURE 4. a – c e), medial longitudinal concavity beneath epiproct quite wide basally, two clusters of 8–9 spines along between mesolateral portion of concavity and posterior lateral margin of tergum X. Cercus slightly sclerotized and ovum-shaped. Epiproct basally subquadrate, slightly rounded after KOH treatment, apex with narrower quadrate process ( Figs. 2 View FIGURE 2 d, 4f–h), the narrowed apex ca. half width of main body, its basal part consisting of two sclerotized bands, apical portion membranous with a pair of mesolateral tiny spines, basal sclerotized bands and membranous apex well delimited and triangular in lateral view; dorsal sclerite with slender, lateral dark bands; a pair of distinct curved sclerite present medially in dorsal and lateral views; ventral sclerite with gentlely swollen buldging ridge but without fringed spines ( Fig. 2 View FIGURE 2 e). Paraproct ( Figs. 2 View FIGURE 2 f, 2h–i): outer lobe basally fused with median lobe, apex upcurved with 7–8 apical spines; median lobe wide basally, slightly narrowed toward upcuved tip in ventral view, apex with membrane attached with outer lobe, spoon-shaped in dorsal aspect and armed with 4 apical spines ( Fig. 2 View FIGURE 2 a, 2i); inner lobe typically triangular, with a small subapical lobe at proximal margin.

Female. Unknown.

Type material. Holotype male ( HIST), China, Yunnan, Baoshan City, Tengchong County, Gaoligong Mountains , Xiaodifang Village , 2012. V.10, coll. W. Li . Paratype, 1 male ( CAU), same locality and date, coll. Y. Liu .

Etymology. The specific name refers to the specific colour pattern of the pronotum.

Distribution. China (Yunnan Province).

Diagnosis and Remarks. The dorsal aspect of epiproct of A. bimaculata is superficially similar to that of A. apiciglobosa Li and Yang, 2008b , also from Yunnan Province, but it easily separated from that species by the armature of paraproctal outer lobe. In addition, the apex the hypoproct of A. bimaculata is parallel-sided in ventral view and has an additional slender up-curved lobe in lateral view, but that structure of A. apiciglobosa is distintly swollen without a additional lobe, which is considered diagnostic feature for A. bimaculata . Additionally, the pigmented pronotum in combination with quadrate apex bearing two tiny spinules of epiproct are unique in A. bimaculata .