Griseothosea nigrifasciata, Zhang & Solovyev & Liang & Wang & Wang, 2023

Zhang, Quanhong, Solovyev, Alexey V., Liang, Jiamin, Wang, Min & Wang, Houshuai, 2023, A new species of Griseothosea (Lepidoptera, Limacodidae) from Wuyishan National Park, China, Zootaxa 5323 (3), pp. 429-434 : 430-432

Griseothosea nigrifasciata sp. nov. ( Figs. 1–3, 6–8 )

Diagnosis. G. nigrifasciata sp. nov. is similar to G. mixta in the wing patterns, but the forewings of the former species have entire external fasciae (from near apex to tornus) and postmedial fasciae from discal spot to trailing edge is lumpish. The male genitalia of the new species are similar to those of G. fasciata ( Moore, 1888) ( Figs. 4, 5, 9, 10 ), but the former can be easily distinguished from the latter by the uncus with strongly curved lateral margin, juxta bearing two finger-shaped protrusions, and aedeagus shorter and slender.

Description. Adults ( Figs. 1, 2 ). Male. Body length 15 mm. Wingspan 27–29 mm. Antennae bipectinate, with gray-brown. Head, thorax and abdomen nigger-brown, covered densely with hairs. Labial palpus wide, proboscis reduced, the foretibia of forelegs with white hairs. Forewings grayish-brown, with a large black discal spot at upper angle of the discal cell, with three black fasciae, external fasciae between near apex to tornus is zig-zag slightly, postmedial fascia from discal spot to trailing edge is short and inclined, and antemedial fascia is darker, wing edge gray-brown. Hindwings nigger-brown, without patterns.

Wing venation ( Figs. 3, 6 ). Frenate wing-coupling. Forewings with R 2, R 3 and R 4 stalked, R 5, M 1 and M 2 almost parallel, M 2 and M 3 originating from the lower angle of discal cell. CuA 1 and CuA 2 are slightly incurved, 1A+2A forked at the base. Hindwings with Rs and M 1 short-stalked basally near the upper angle of the discal cell, M 2 and M 3 almost parallel, 3A and 1A+2A almost parallel.

Male genitalia ( Figs. 7, 8 ). Uncus bearing heavily sclerotized short spur at the apex. Gnathos long hooked, thick, robust, and narrowed to apex. Valva approximately oblong, basally relatively wide. Tegumen short and wide. Juxta denticle-shaped, with two finger-shaped protrusion apically. Saccus short. Aedeagus almost as long as valva, with a tapered apex, gradually slightly curved toward distal area.

Female. unknown.

Type material. Holotype: male, Wuyishan National Park , Nanping City, Fujian Province, China, N27°42′38.04″ E117°39′20.07″, altitude 1200 m, 18-V-2021, leg. Min Wang & Yulong Zhang. Paratypes: 1 male, Wuyishan National Park , Nanping City, Fujian Province, China, N27°44′48.70″ E117°40′40.19″, altitude 750 m, 18-V-2021, leg. Min Wang. 1 male, Wuyishan National Park , Nanping City, Fujian Province, China, N27°42′38.04″ E117°39′20.07″, altitude 1200 m, 18-V-2021, leg. Min Wang & Yulong Zhang.

Distribution. China, Fujian, Wuyishan National Park, forest zone 750–1200 m elevation.

Etymology. The new species is named after the darker fasciae in the forewings.

Remark. The new species is also well supported by a phylogenetic analysis of the COI gene ( Fig. 11 ). The genetic distance values of DNA barcode data between Lepidoptera species are usually greater than 3% ( Hebert et al. 2003). Interspecific distances of Griseothosea ranged from 8.21% to 10.08%, the minimum distance of the new species is 8.52% with G. rufula in table 2.

Figures

FIGURE 11. Neighbor-joining (NJ) phylogenetic tree of the four species of Griseothosea.

FIGURES 1–10. Griseothosea spp.: 1, G. nigrifasciata sp. nov., holotype male, Fujian; 2, G. nigrifasciata sp. nov., paratype male, Fujian; 3, G. nigrifasciata sp. nov., paratype male, forewing venation, Fujian; 4, G. fasciata, male, Guangdong; 5, G. fasciata, male, Sichuan; 6, G. nigrifasciata sp. nov., paratype male, hindwing venation, Fujian; 7, G. nigrifasciata sp. nov., holotype male genitalia, Fujian; 8, G. nigrifasciata sp. nov., paratype male genitalia, Fujian; 9, G. fasciata, male genitalia, Guangdong; 10, G. fasciata, male genitalia, Sichuan.