Amphinemura jiaoheensis, Chen, 2020

Chen, Zhi-Teng, 2020, Two new species of Nemouridae (Insecta: Plecoptera) from China, European Journal of Taxonomy 651, pp. 1-16 : 9-13

publication ID 10.5852/ejt.2020.651

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Amphinemura jiaoheensis

sp. nov.

Amphinemura jiaoheensis View in CoL sp. nov.

Figs 8–11 View Fig View Fig View Fig View Fig , 13 View Fig


Amphinemura jiaoheensis sp. nov. exhibits the typical body color and genitalic characters of genus Amphinemura ( Figs 8–11 View Fig View Fig View Fig View Fig ). The new species is apparently distinctive from all congeners by the following combination of characters: 1) male T9 with paired posterior projections which are covered by thick spines; 2) male T10 with two long bunches of stout spines; 3) ventral sclerite of epiproct long, triangular and ventrally fringed with thick spines; 4) median lobe and outer lobe of male paraprocts embracing a membrane, margin of the membrane with long spines; 5) female with a small pregenital plate and a medially divided subgenital plate. The deep posterior notch of tergum 9 together with the long bunches of stout spines on tergum 10 are rarely found in Amphinemura ( Figs 9A View Fig , 10A View Fig ). Although a similar notch and spines are also found in Amphinemura leigong Wang & Du, 2006 from Guizhou Province of southwestern China, the structures of the epiproct and paraprocts are entirely different between A. leigong and the new species ( Fig. 12 View Fig ).


The new species is named after the type locality, Jiaohe City.

Material examined


CHINA • ♂; Jilin Province, Jiaohe City, Sidaogou Mountain , a small unnamed stream ( Fig. 13 View Fig ); 43°44′40′′ N, 127°03′05′′ E; 600 m a.s.l; 22 July 2019; Zhi-Teng Chen leg.; ICJUST.


Paratypes GoogleMaps

CHINA • 1 ♂, 2 ♀♀; same collection data as for holotype; ICJUST.



MEASUREMENTS. Holotype: BL = 6.0 mm; FL = 7.0 mm; HL = 6.0 mm. Other specimen: BL = 3.8 mm; FL = 6.0 mm; HL = 5.0 mm.

HEAD ( Fig. 8 View Fig A–B). Dark; three ocelli pale; compound eyes dark and rounded; antennae slender and dark brown, much longer than body length; mouthparts brown.

THORAX ( Fig. 8 View Fig A–B). Dark brown. Pronotum dark brown, with dark rugosities, corners blunt; anterior margin arcuate, posterior margin concave. Legs pale brown.

WINGS ( Fig. 8 View Fig A–B). Macropterous, wing membrane subhyaline, veins dark brown; margins of wings fringed with short bristles.

ABDOMEN ( Figs 8–9 View Fig View Fig , 10A View Fig ). Abdominal segments generally pale brown; anterior margins of abdominal terga 3‒8 each with two dark lateral sclerites; sterna 3‒8 each with two dark lateral sclerites. Tergum 9 strongly sclerotized, anterior margin concave, posterior half elevated and with a transverse patch of stout spines. Tergum 10 darkly sclerotized, with a membranous median area, each side of median area with a knob bearing stout spines. Cerci dark brown, coniform and covered by long hairs.

GENITALIA ( Figs 8 View Fig C‒E, 9‒10). Dorsal aspect of epiproct covered with spinulose membrane, medially grooved, apex with a pair of small lobes; apical and ventral membrane of epiproct mostly covered with scales. Dorsal sclerite of epiproct with two slender, lateral sclerites projecting to near apex; inside the membrane with a median sclerite; lateral knobs strongly sclerotized, elliptical in dorsal view. Ventral sclerite strongly sclerotized; in lateral view, ventral sclerite constricted basally, mostly forming a subtriangular sclerite fringed with stout spines, apically with more spines. Vesicle of sternum 9 mostly membranous, claviform and slightly constricted basally; hypoproct elongated, apex extended backwards, with a long finger-shaped sclerite. Paraprocts trilobed; inner lobe sclerotized, fusiform with a blunt tip, nearly as long as width of paraprocts; median lobe strongly sclerotized, broad basally, strongly curved dorsad, apex with long spines; outer lobe strongly sclerotized and curved dorsad, sinuous in lateral view; a layer of membrane present between outer lobe and inner lobe, membrane with a caudal patch of long spines and several longer dorsal spines.


Similar to males in body coloration ( Fig. 11 View Fig A‒B).

MEASUREMENTS. BL = 4.8‒5.0 mm; FL = 7.0‒ 7.5 mm; HL = 6.0‒ 6.2 mm.

GENITALIA ( Fig. 11C View Fig ). Pregenital plate of sternum 7 small and semicircular. Subgenital plate of sternum 8 subquadrate, with a narrow median split, slightly extending over posterior margin of sternum 8. Paraprocts semicircular and dark brown.


China: central Jilin Province ( Fig. 1 View Fig ).













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