Sinacroneuria huzhengkuni Du & Huo, 2020

Qing-Bo, Huo & Yu-Zhou, Du, 2020, Two new species of Sinacroneuria Yang & Yang, 1995 (Plecoptera: Perlidae) from Guizhou, southwestern China, Zootaxa 4834 (2), pp. 283-292 : 283-284

Sinacroneuria huzhengkuni Du & Huo sp. nov.

Adult habitus: General body color yellow brown. Triocellate; anterior ocellus small; distance between posterior ocelli almost equal to width the eyes. Head yellowish, with an inverted triangular dark spot on the median frontocylpeus area; an axe-head shape dark area covering ocellar triangle, separate from the frontocylpeus spot ( Fig. 1 ). Pronotum brownish with pale rugosities ( Fig. 1 ). Wings hyaline, veins dark brown; legs brown. Abdominal segments pale brown.

Male: Forewing length ca. 21 mm, hindwing length 19 mm, body length 17 mm. Tergum 9 with a broad sensilla basiconica patch growing backwards and inwards, but remaining as a V-shaped membranous median area. Tergum 10 terminally truncated; sensilla patch not obviously divided ( Figs. 2–3 ).

Paraprocts long and fingerlike, heavily reflexed inward and forward, tips keeping close adjacent to each other ( Fig. 3 ). Hammer small, oval and set near posterior margin of sternum 9 ( Fig. 2 ). Aedeagal sclerite highly sclerotized, gently upturned terminally; stem short and wide; Y-arms curved ventrad, with medial part closed, apex tapering and convergent; two lateral sclerites located on base of medial sclerite, short and slender ( Fig. 4 ).

Female, Egg and Nymph: Unknown.

Type material: Holotype: 1♂ ( ICYZU), China, Guizhou Province, Tongren City, Mount Fanjing (Fanjingshan), Yamugou stream, 108.73°E, 27.80°N, 2019-VI-9, leg. Hu Zheng-Kun ( Fig. 5 ).

Distribution: China (Guizhou Province).

Etymology: The species is named in honor of Mr. Hu Zheng-Kun, an insect hobbyist from Guizhou that has provided generous help collecting material.

Diagnosis: This new species has a similar aedeagal sclerite as S. longwangshana , S. sinica and S. yiui , but its lateral sclerites are sword-shaped and more acute apically. Additionally, the male paraprocts of Sinacroneuria are usually shorter, toothlike but in this new species, the paraprocts are long (resembling the hemitergal lobes of some Perlinae , such as Kamimuria Klapálek, 1907 ) reaching ½ length of tergum 10, with its apex inward and upcurved.

Remark: The holotype, the only known specimen was collected along a wide valley stream with a dense riparian canopy ( Fig. 5 ).

Figures

FIGURE 1. Sinacroneuria huzhengkuni Du & Huo sp. nov., male habitus (dorsal and ventral); male head and pronotum.

FIGURE 2. Sinacroneuria huzhengkuni Du & Huo sp. nov., male terminalia. A: dorsal; B: ventral; C: lateral.

FIGURE 3. Sinacroneuria huzhengkuni Du & Huo sp. nov., male terminalia, caudal view.

FIGURE 4. Sinacroneuria huzhengkuni Du & Huo sp. nov., aedeagal sclerite. A: dorsal; B: ventral; C: lateral.

FIGURE 5. Habitat (Yamugou Stream, Mt. Fanjing, Guizhou Province, China. Photo provided by Hu Zheng-Kun) and distribution of Sinacroneuria huzhengkuni Du & Huo sp. nov.