Kamimuria dabieshana, Yan & Kong & Li, 2021

Yan, Yanhua, Kong, Fanbin & Li, Weihai, 2021, A new species of Kamimuria (Plecoptera: Perlidae) from China, with notes on K circumspina Li, Mo & Yang, 2019, Zootaxa 4927 (4), pp. 549-558 : 550-554

Kamimuria dabieshana sp. n.

( Figs. 1–5 )

Adult habitus. Coloration generally brown to dark brown. Head pale brown with subquadrate black marking covering ocellar area, in older specimen, the patch extending anterolaterally between M-line and tentorial callosites, frons brownish to brown. Occiputal area posterior to ocelli brownish to brown ( Fig. 1a ). Antennae brown to dark brown, palpi lighter. Pronotum brown, surface rugose, anterior margin convex, overlapping part of occiput. Legs brown. Wing membrance brownish, veins darker.

Male ( Figs. 1–2 ). Forewing length ca. 14.8–16.1 mm, hindwing length ca. 13.1–13.8 mm. Hemitergal lobe recurved, extending backward to anterior margin of tergum 10, the lobe in lateral view gradually curved upward medially to gently tapering apex ( Figs. 1 b–1d). Tergum 9 with typical mesal sclerite, its sensilla basiconica covering most length of tergum 9, and the posterior margin sclerite forming a mesal indentation. Tergum 8 with irregular rows of sensilla ( Figs. 1b ). Setal patches of metasternum and sterna 4–7 typical.

Aedeagus ( Fig.2 ). Slightly S-shaped in lateral view ( Fig. 2c ). Apical 2/3 distinctly constricted and with a small dorsal lobe before the constriction. Main armatures: basal half mostly covered by brown microtrichia but with medial interruption on dorsal surface. Distal half with a pair of strip-like sclerites and spines of three different sizes: the large spines hook-like and forming an incomplete ring consisting of 9-10 lateral hooks and 18-20 ventral hooks; around the ventral hooks with a subrectangular patch of small spines; medium-sized spines located on a pair of triangular dorsolateral lobes subapically.

Female ( Figs. 3 a–3d). Forewing length ca. 16.3 mm, hindwing length ca. 13.9 mm. Body color lighter but color patten similar to males ( Fig. 3a ). Subgenital plate of sternum 8 large, covering 2/3 width of the segment, posterior margin overlapping basal half of sternum 9. Posterolateral edge rounded before the paired, narrow triangular lobes; the posteromedial notch between the lobes shallow but wide, about 1/3 width of the subgenital plate ( Fig. 3b ). Vagina oval-shaped, with sclerotized folds, spermathecal stalk slender, spermatheca oval-shaped, with glands ( Figs. 3 c–3d).

Egg ( Figs. 3 e–3f, 4a–4d). Oval-shaped, Chorion brown, 343–360 μm long and 238–251 μm wide (N=4). Collar shortly stalked, and opercular end rounded. Chorion mostly smooth but operculum is punctuated. Micropyles 3–6 without rim, linearly located near the opercular end. Collar rim flanged with a row of FCIs. Collar end with two rows of FCIs.

Type material. Holotype: male, China: Hubei Province, Yingshan County, Caopan Town, Dabie Mountains , Taohuachong Forest Park , black light trap, N 30.9601°, E 115.7571°, 650 m, 2018.VI.16, Yunlan Jiang ( CAU) . Paratypes: 1 male and 1 female, same location as holotype, N 30.8863°, E 115.7790°, 694 m, 2014. VI .25, Mengchao Tan ( HIST)

Etymology. The specific name refers to the type locality, Mt. Dabieshan.

Distribution. The new species was found in a river along the tourist trails through the scenic spot of the Dabie Mountains in Hubei Province of China. The average altitude of Taohuachong scenic spot in Yingshan County is ca. 1200 m. The specimens were collected using light trap at the riverside.

The widest part of the river is about 6 meters. The river depth is between a few centimeters to the deepest ca. 2 meters in several small ponds under several cascades. There are many pebbles, cobbles, boulders and large rocks at the bottom of the river. The riparian vegetation includes dense, deciduous and evergreen broadleaved forest and scattered ruderal vegetation ( Fig. 5 ).

Remarks. The new species is apparently closely related to K. circumspina originally known from Guizhou Province in having nearly identical color pattern and similarly arranged spines and hooks of aedeagal sac. However, in K. dabieshana sp. n., apical 2/3 of the aedeagus is distinctly constricted and has a small dorsal lobe before the constriction. The K. circumspina hasn’t such a dorsal lobe before the constriction (fig. 2b in Li et al. 2019). Additionally, the sensilla of tergum 9 in K. dabieshana sp. n. are pale brown, like those in K. flavimacula Yan, Liu & Li 2019 , while K. circumspina has black tergal sensilla. And the hemitergal lobes of K. dabieshana sp. n. are upcurved medially, but those in K. circumspina are bent to upcurved apex subapically.

Females of these two species differs dramatically: the subgenital plate of K. dabieshana sp. n. is much wider, covering 2/3 width of the segment, and the posteromedial notch between the posterior lobes is shallow but wide. This female subgenital plate of K. circumspina is narrower ca. half width of the segment and the posteromedial notch is deep and narrow, arch-like. Their eggs are also different: in K. dabieshana sp. n. two rows of FCIs, exist in collar end, but the collar end in Kamimuria circumspina has a row of FCIs. DNA barcoding data will be expected to support the distinctiveness of these two species.

Figures

FIGURE 1. Kamimuria dabieshana sp. n. (male). a. Head and pronotum, dorsal view. b. Terminalia before being relaxed, dorsal view. c. Relaxed hemitergal lobes, dorsal view. d. Relaxed hemitergal lobes, lateral view.

FIGURE 2. Kamimuria dabieshana sp. n. (everted aedeagus of male). a. Aedeagus, dorsal view. b. Aedeagus, ventral view. c. Aedeagus, lateral view. d. Apex of aedeagus, dorsal view. e. Apex of aedeagus, ventral view. f. Apex of aedeagus, lateral view.

FIGURE 3. Kamimuria dabieshana sp. n. (female). a. Head and pronotum, dorsal view. b. Terminalia, ventral view. c. Vagina, dorsal view. d. Vagina, lateral view. e. Eggs, variable views. f. Eggs, variable views.

FIGURE 4. Kamimuria dabieshana sp. n. a. Entire egg, lateral view. b. Collar end, apical view. c. Collar end, lateral view. d. Opercular end and micropyles, lateral view.

FIGURE 5. Habitat of Kamimuria dabieshana sp. n.