Amphinemura oblonga Rehman, Du & Zhao, 2021

Rehman, Abdur, Zhao, Meng-Yuan & Du, Yu-Zhou, 2021, Two new species of Amphinemurinae (Plecoptera; Nemouridae) from Yunnan Province, China, Zootaxa 5068 (1), pp. 115-124 : 116-120

publication ID	https://doi.org/ 10.11646/zootaxa.5068.1.5
publication LSID	lsid:zoobank.org:pub:1E38ABA6-B874-4E0C-8164-5E1C925921E2
DOI	https://doi.org/10.5281/zenodo.5701930
persistent identifier	https://treatment.plazi.org/id/E654FF48-FE50-FFA8-D88C-75FFFD01FDD3
treatment provided by	Plazi
scientific name	Amphinemura oblonga Rehman, Du & Zhao
status	sp. nov.

Treatment

Amphinemura oblonga Rehman, Du & Zhao View in CoL sp. nov. ( Figs 1–5 View FIGURE 1 View FIGURE 2 View FIGURE 3 View FIGURE 4 View FIGURE 5 )

Adult habitus. General body color brown to dark brown. Head and antennae black, pronotum dark brown with scattered structure ( Figs. 2A–B View FIGURE 2 ). Legs dark brown, femora and tibia paler towards the apex, tarsi dark brown. Wing membrane subhyaline, venation brown. Abdomen brownish, posterior segments 9–10 of abdomen dark brown with tiny pale hairs ( Fig. 1 View FIGURE 1 ).

Male terminalia: Tergum IX dark brown and weekly sclerotized, moderately constricted medially with slight triangular anterior and posterior indentations, with few dark brown spines on posterior margins ( Figs. 2C View FIGURE 2 , 5A View FIGURE 5 ). Slender claviform vesicle present on Sternum IX, basally constricted, medially wide and tapered toward tip. Hypoproct quadrangular basally, progressively narrowing towards apex with round tabular tip ( Figs. 2D View FIGURE 2 , 5B View FIGURE 5 ). Tergum X sclerotized, constricted anteriorly and posteriorly in the middle, basal part of posterior portion weekly sclerotized, posteromedial margins sclerotized with a median concavity that is bearing two anterolateral spines nearly above the apex of epiproct ( Figs. 2C View FIGURE 2 , 5A View FIGURE 5 ). Cercus is short and slightly sclerotized. Epiproct subrectangular in shape, dorsal sclerite with two dorsolateral broad bands extended from the base and gradually tapering towards apex, making finger-like projection on tip; tip bifurcate, medially and laterally membranous. Ventral sclerite of epiproct strongly sclerotized and medially slightly expanded, bearing a row of numerous large, thick and dark spines ( Figs. 3A–F View FIGURE 3 , 5E–F View FIGURE 5 ). Paraproct divided into three lobes, inner lobe triangular in shape, slightly sclerotized with an apical dark strip forming an acute tip. Median lobe narrow and long, distinctly sclerotized, bearing three to four tiny apical spines and strongly curved upward, towards dorsal side of terminalia. Outer lobe is slender and long, distinctly sclerotized, bent outwards, bearing five to six dark thick spines on its apex ( Fig. 3B View FIGURE 3 , 5D View FIGURE 5 ).

Female: General body pattern, color and cervical gills similar to males. Sternum VII with wide, concave and dark brown, semicircular pregenital plate. Sternum VIII with elongated, dark brown and strongly sclerotized trapezoid subgenital plate, medially divided in its nearly full length by a narrow notch of parallel sides, extending up to Sternum IX ( Figs. 4A, C View FIGURE 4 ). Sternum IX dorsally with long hairs and strongly sclerotized ( Fig. 4B View FIGURE 4 ).

Type materials: Holotype male, China, Yunnan province, Diqing Tibetan Autonomous Prefecture, Shangrila city, Gezan township , Langdu Village , 2019-IX-07, N 28°14.164’ E 99°59.737’, 3609 m, Leg. Qing-Bo Huo GoogleMaps ; Paratypes, 7 males, 10 females, same data as for the holotype GoogleMaps .

Distribution: China (Yunnan Province).

Etymology: The name of the new species refers to the shape of epiproct that is long elliptic. The Latin “ oblonga ” means long and elliptical.

Diagnosis: This new species is characterized by dorsal sclerite of epiproct with two dark, straight dorsolateral bands arise from the base and with finger-like projection on the apex, producing a bifurcate tip. Numerous dark and thick spines are present on the ventral keel of ventral sclerite of epiproct. The paraproct median lobe is long and curved upward, while the outer lobe is slender with thick, dark spines posteriorly towards its apex.

Remarks: The new species is closely similar to Amphinemura bihamata Li & Yang, 2008 (in: Li & Yang, 2008) from Sichuan province in general appearance and shape. The new species can be distinguished from A. bihamata by the shape of epiproct and the paraproct outer lobe. The epiproct of A. bihamata have a pair of dark medial bar producing round apex, while new species have finger-like projection bearing bifurcate structure on the tip, and in lateral view the epiproct is bearing a row of long and thick spines which easily distinguish the new species. The outer lobe of A. bihamata is upcurved, resulting in hook shape, while the new species outer lobe is not upcurved and bearing more than five large, thick spines. The new species is also close to A. ovalis Li & Yang, 2005 (in: Li & Yang, 2005) from Sichuan province in general appearance and shape. The two species can be distinguished by details of the paraproct: the median lobe of A. ovalis curved laterally, and its oval apex bearing several rows of black thick spines. The female of the above closely related species remained unknown, while our female share some similar characters with A. sclerotica Du & Zhou, 2007 (in: Du et al. 2007a) from Sichuan and A. tubulata Du & Zhou, 2007 (in: Du et al. 2007a) from Yunnan province.