Amphinemura microhamita, Li & Dong & Yang, 2018

Li, Weihai, Dong, Wenbin & Yang, Ding, 2018, New species and new records of Amphinemurinae (Plecoptera: Nemouridae) from Shaanxi Province of China, Zootaxa 4402 (1), pp. 149-162 : 152-157

Amphinemura microhamita sp. nov.

Figures 5 & 6 .

Diagnosis. The males of this new species are characteriZed by the dorsal sclerite with two narrow darkly sclerotiZed, S-shaped lateral bands terminating near apex ( Fig. 5c ). The paraproctal outer lobe has apex forming a small triangular hook with several short spines along outer margin ( Figs. 5d, 5e ).

Male habitus ( Figs. 5a ). Head mostly dark brown, ocellar triangle and occiput light; antennae brownish. Thorax brown, pronotum trapeZoidal, covered with scattered rugosities, corners rounded; legs brownish. Wing membranes subhyaline, veins dark. Abdomen reddish brown with darker terminalia.

Male ( Figs. 5b–5e , 6 ): Forewing length 7.4–7.5 mm. Terga I–VIII with two sclerotiZed anterolateral bands at basal margin. Tergum IΧ ( Fig. 6a ) heavily sclerotiZed, distinctly constricted medially, with two paramedial patches of tiny spines and 2–3 long hairs at posterior margin. Sternum IΧ with claviform vesicle, distal ½ with membranous ventral surface, much longer than that in the previous species ( Fig. 6b ). Hypoproct subquadrate at basal ¼, medial ¼ gradually tapering in an up-curved tubular tip ( Fig. 6b ). Tergum Χ sclerotiZed with a heavily sclerotiZed central strip, anterolateral portions of the usual concavity beneath epiproct with two clusters of spinules. Cercus membranous, longer than wide. Epiproct ( Figs. 5b–5c , 6c–6d ) curved backward, at least 3Χ longer than widest base; generally rectangular but median portion slightly constricted, apical ⅓ slightly enlarged. Dorsal sclerite with two narrow darkly sclerotiZed, S-shaped lateral bands terminating near apex, its basal ½ obscure due to the upper overlapping membrane before KOH treatment ( Figs. 5b–5c ), the distal ¼ with lateral membranous flaps in both dorsal and lateral views. Ventral sclerite forming an obtuse triangular, sclerotiZed ridge with two rows of small ventral spines ( Fig. 6d ). Paraproct tri-lobed ( Figs. 5d–5e , 6e ): inner lobe sclerotiZed and triangular; median lobe similar and parallel to outer lobe, except with a wide base and a rounded membranous apex, with ca. 5 long spines around the membrane and an additional top spine; outer lobe generally forming a slender sclerite, basal and apical portions abruptly curved, apex forming a small triangular hook in dorsal and caudal aspects, with several short spines along outer margin, about as long as median lobe ( Figs. 5d–5e , 6e ).

Female. Unknown.

Type Material. Holotype male ( HIST), CHINA: Shaanxi Province, HanZhong, Yang County, Guandi town , Tiehe Village , 866 m, N 33°45.71' E 107°44.52', 2017. V.3, Haoyu Liu . Paratypes: 1 male ( CAUC), same town, Mahe Village, 749 m, N 33°38.22' E 107°62.21', 2017. V.4, Haoyu Liu , 1 male ( HIST), same county, Huayang town, Qingxi Village , 854 m, N 33°62.17' E 107°31.82', 2017. V.5, Haoyu Liu.

Etymology. The species refers to the small, hook-like apex of the outer paraproct lobe; the Greek “micro” means small and the latin word “hamus” means hooked.

Distribution. China (Shaanxi Province).

Remarks. See under the above species A. longihamita .

Figures

FIGURE 5. Amphinemura microhamita sp. nov. (male). a. Adult habitus, dorsal view. b–c. Epiproct, dorsal view. d–e. Paraproct apical half, dorsolateralview, c &e showing variation after KOH treatment.

FIGURE 6. Amphinemura microhamita sp. nov. (male). a. Terminalia, dorsal view. b. Terminalia, ventral view. c. Epiproct, dorsal view.d. Epiproct, lateral view.e. Right paraproct, caudal view.