Amphinemura longihamita, 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

Amphinemura longihamita sp. nov.

Figures 3 & 4 .

Diagnosis. The male of this new species is characteriZed by the dorsal sclerite of epiproct with two dark wire-like lateral bands terminating before apex in dorsal view ( Fig. 3c ). The paraproctal outer lobe has an elongate hook with several short spines along outer and distal margins ( Figs. 3d, 3e ).

Male habitus ( Figs. 3a ). General color brown to dark brown. Head black. Thorax brown, pronotum brown, with scattered rugosities; legs brown, tibia get paler to apex. Wing membranes subhyaline, veins brown. Abdomen brown with darker terminalia.

Male ( Fig. 3b–3e , 4 ): Forewing length ca. 5.6 mm. Tergum IΧ ( Fig. 4a ) sclerotiZed, with a wide anterior and rounded mid-posterior indentations, with marginal tiny spines together with long hairs along mid-posterior margin. Sternum IΧ with claviform vesicle, distal ½ membranous ( Fig. 4b ). Hypoproct subquadrate at base, apical ½ tapering and trapeZoid ( Fig. 4b ). Tergum Χ sclerotiZed with two oblique posterolateral strips. Cercus slightly sclerotiZed and much longer than wide. Epiproct ( Figs. 3b–3c , 4a, 4c ) spindle-shaped and curved backward, over 3Χ longer than widest midlength ( Figs. 3b–3c ). Dorsal sclerite with two dark wirelike lateral bands terminating before apex in dorsal view, distal ½ filament-like in lateral view. Ventral sclerite forming distinct triangular ridge with 4 rows of lateral and ventral spinules ( Fig. 4c ). Paraproct tri-lobed ( Figs. 3d–3e , 4a, 4b, 4d ): inner lobe hidden by paraproct and triangular; median lobe more slender than outer lobe, except with a wide base and a rounded membranous apex, with 5–6 short and 3 long marginal spines; outer lobe generally forming a slender sclerite, apical portion abruptly up-curved, apex forming an elongate hook in dorsal and caudal aspects, with several short spines along outer and distal margins, about as long as median lobe ( Figs. 3d–3e , 4d ).

Female. Unknown.

Type Material. Holotype male ( HIST), CHINA: Shaanxi Province, HanZhong, Yang County, Guandi town , Χiaoxigou Village , 1270 m, N 33°48.87' E 107°40.56', 2017. V.3, Haoyu Liu.

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

Distribution. China (Shaanxi Province).

Remarks. The male of the new species appears is similar to A. microhamita sp. nov. described below also Yang County of Shaanxi Province. However, the apical hook of the paraproctal outer lobe in A. longihamita is much longer and parallel-sided whereas paraproctal lobe of A. microhamita sp. nov. is small and triangular. The medially enlarged epiproct also readily distinguishes A. longihamita from A. microhamita sp. nov, whose epiproct is medially constricted.

Figures

FIGURE 3. Amphinemura longihamita sp. nov. (male). a. Adult habitus, dorsal view. b–c. Epiproct, dorsal view. d. Paraproct apex, anterodorsolateral view.e. dorsolateral view.c & e showing variation after KOH treatment.

FIGURE 4. Amphinemura longihamita sp. nov. (male). a. Terminalia, dorsal view. b. Terminalia, ventral view. c. Epiproct, lateral view. d. Right paraproct, caudal view.