Amphinemura apicilobata, 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 : 381-383

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.6074290
persistent identifier	https://treatment.plazi.org/id/03D6878E-371B-225C-FF3D-5F4CD715FB10
treatment provided by	Plazi
scientific name	Amphinemura apicilobata
status	sp. nov.

Treatment

Amphinemura apicilobata View in CoL sp. nov.

( Figs. 1 View FIGURE 1 , 3 View FIGURE 3 a, 4a–c)

Adult habitus ( Fig. 3 View FIGURE 3 a). Head and appendages dark brown, compound eyes black. Thorax brown, pronotum subrectangular with obscure rugosities, corners obtuse; legs yellowish brown. Wing membranes subhyaline, veins brown to dark brown. Abdomen brown, terminalia darker.

Male: Forewing length 6.4–6.5 mm, hind wing length 5.4–5.5 mm. Tergum IX weakly sclerotized, anterior indentation broad but shallow; a row of strong bristles and many tiny spines located on paramedial part along posterior margin ( Figs. 1 View FIGURE 1 a, 4a). Vesicle of sternum IX claviform, parallel-sided at most length, basal part with distinct lateral hairs ( Fig. 1 View FIGURE 1 b). Hypoproct subquadrate basally, gradually narrowing toward nipple-like tip, with a triangular lateral notch before conjuction with posterior margin of sternum 9 ( Fig. 1 View FIGURE 1 b). Tergum X sclerotized, a typical medial longitudinal concavity present beneath epiproct, covered by several scattered spinules along anterolateral portion of concavity ( Figs. 1 View FIGURE 1 a, 4a). Cercus slightly sclerotized and gently curved inward ( Fig. 1 View FIGURE 1 b). Epiproct ( Figs. 1 View FIGURE 1 e, 4b–c) long and recurved; generally subquadrate, apical half slightly narrow but swollen after KOH treatment ( Figs. 4a, c View FIGURE 4. a – c ), apex rounded with an indented tip in dorsal view ( Figs. 1 View FIGURE 1 a, e; 4b–c). Dorsal sclerite with two narrow, darkly sclerotized, X-shaped lateral bands in dorsal view; beyond medial portion extending and forming two triangular lateral membranous processes covering part of the bulging ridge of ventral sclerites in lateral view ( Fig. 1 View FIGURE 1 d–f). Ventral sclerite with expanded triangular sclerotized area fringed with a row of thick ca. 7 spines subapically, then an erect ridge fused with dorsal sclerite ( Figs. 1 View FIGURE 1 c, 1f). Paraproct divided into three lobes: outer lobe a curved sclerite with 7–8 long subapical spines before a swollen membranous apex, mostly adhering to median lobe, in lateral view the medial half is enlarged ventrad; median lobe distally fused with outer lobe, nearly parallel-sided, distal half up-curved and apex with a row of long, subapical and apical lateral spines; inner lobe sclerotized and with slightly bilobed apex, partly hidden by hypoproct, nearly as long as outer lobe ( Fig. 1 View FIGURE 1 g).Female: unknown.

Type material. Holotype male ( CAU), CHINA: Yunnan Province, Baoshan City, Tengchong County, Gaoligong Mountains , Datang , Cizhu River , 2012. V.8, coll. Y. Liu . Paratype, 1 male ( HIST), the same locality and date as holotype .

Etymology. The specific name refers to the membranous apical lobe of paraproct.

Distribution. China (Yunnan Province).

Diagnosis and remarks. The new species seems related to a widespread Chinese species, A. curvispina ( Wu, 1973) known from Hunan, Fujian, Zhejiang and Guangxi, in sharing a similar epiproct in dorsal aspect. However, the distinct triangular ridge of the ventral sclerite of epiproct in lateral aspect readily distinguishes A. apicilobata from A. curvispina , in addition to the obviously different spinulation of the paraproctal median lobe. Amphinemura apicilobata also differs from other known species from Yunnan Province by the large membranous apex of paraprocts.