Stigmatophora (Bifurcistigma) bucseki, Zhang & Zhao & Han, 2025

Zhang, Lu, Zhao, Tingting & Han, Huilin, 2025, A new subgenus of Stigmatophora Staudinger, 1881 (Lepidoptera, Erebidae, Arctiinae, Lithosiini) from China, with descriptions of three new species, ZooKeys 1226, pp. 303-317 : 303-317

Stigmatophora (Bifurcistigma) bucseki sp. nov.

Figs 3 , 6 , 15 , 16 , 24 Common name. 布痣苔蛾

Material examined.

Holotype: China • ♂; Guizhou, Zunyi, Suiyang, Huilong ; 6–7. VIII. 2020; H. L. Han & J. Wu leg.; genit. prep. no. ztt-312-1 ; in NEFU.

Paratypes: 3 ♂♂; same data as holotype; H. L. Han & J. Wu leg.; genit. prep. no. ztt-311-1 , ztt-313-1 , ztt-314-1 • 1 ♀; Guizhou, Qiandongnan, Leishan, Langde ; 18–22. VIII. 2020; H. L. Han & J. Wu leg.; genit. prep. no. ztt-397-2 ; in NEFU • 1 ♀; Yunnan, Mojiang , Hani Autonomous County; 18-19. IX. 2008; H. L. Han & J. Wu leg.; genit. prep. no. ztt-375-2 , in NEFU .

Diagnosis.

Externally, the new species is similar to S. (B.) obraztsovi (Figs 1 , 2 , 13 , 14 , 23 ), but it can be separated by the following morphological characters (details for S. (B.) obraztsovi are in parentheses): in S. (B.) bucseki , band on vein M 2 slightly widened toward outer margin and partially connected to costal margin (narrower and fully connected). In the male genitalia, the uncus is long, approximately equal in length to the tegumen (shorter, about 0.75 times); the ampulla is more robust, horn-shaped (slender); and the costa is broader, with the base distinctly enlarged (narrow and smooth). In the female genitalia, the ductus burase is cylindrical (asymmetrical) and the corpus bursae is approximately circular (elliptical).

Description.

Adults (Figs 3 , 6 ). Forewing length 9.5 mm in male, 10.7 mm in female. Head and patagium orange; tegula purple-grey; antenna filiform, brown, with dark brown base; thorax purple-grey; abdomen camel-colored, lighter at 1 st abdominal segment. Forewing ground color brown, fringe orange; costal, inner, and lower margins of cell, M 2 and Cu 1 veins covered with orange band; band on M 2 slightly widening toward outer margin and slightly connected with costal margin. Hindwing ground color brown, terminal line distinct, fringe camel-colored. Male genitalia (Figs 15 , 16 ). Uncus robust, moderately sclerotized, nearly sickle, with a spiculate hooked apex. Tegumen weakly sclerotized, thick, same length as uncus. Valva short and wide, with long hairs at apex; costa slightly depressed medially, distinctly widened at base around 1 / 3 position. Sacculus slightly sclerotized, ca 9 / 10 length of valva, base wide and tapering towards end, end third separated from valva and hooked; medial third strongly sclerotized, slightly inwardly protruding. Ampulla strongly sclerotized, horn-shaped. Lamella centralis moderately sclerotized, connected with base of ampulla and sacculus process. Vinculum strongly sclerotized, V-shaped. Juxta with two lateral lobes on each side, kidney-shaped, with distal half densely covered small granules. Aedeagus robust and slightly sclerotized. Base of vesica smooth, distal part densely covered in small granules, row of cornuti structures U-shaped; subchamber diverticula with prominent elasma. Female genitalia (Fig. 24 ). Papillae anales slightly sclerotized, covered with setae. Anterior and posterior apophysis slender, almost equal in length. 8 th sternite sclerotized and semicircular. Ostium bursae slightly sclerotized and rough, scalloped, with a sclerotized, transverse band. Ductus bursae very broad at base and gradually narrowing towards apex, strongly sclerotized, with dense microspines, with conspicuous folds, and a strongly sclerotized, nipple-shaped process on right. Corpus bursae ellipsoidal, rough, and densely covered with small spines.

Bionomics.

The type series was collected in early August at an altitude of 958 m in a subtropical mixed forest. The forest floor was densely covered with a variety of shrubs, ferns, and expansive patches of grassland.

Etymology.

The new species is named after Slovakian entomologist Karol Bucsek for his help with identification.

Distribution.

China (Guizhou: Zunyi, Qiandongnan; Yunnan: Mojiang) (Fig. 27 ).

Figures

Figure 27. Collecting sites of three new Stigmatophora spp.

Figures 1–12. Adults of Stigmatophora spp. 1 S. (Bifurcistigma) obraztsovi, male, China (Jiangxi) 2 ditto, female, China (Nanling) 3 S. (B.) bucseki sp. nov., male, holotype, China (Guizhou) 4 S. (B.) longa sp. nov., male, holotype, China (Heilongjiang) 5 ditto, male, paratype, China (Heilongjiang) 6 S. (B.) bucseki sp. nov., female, paratype, China (Guizhou) 7 S. (Stigmatophora) micans, male, Zavkhan aimak, Mongolia (after Volynkin et al. 2018) 8 ditto, female, East Siberia, Russia (after Volynkin et al. 2018) 9 S. (Pseudomiltochrista) zolotuhini, male, India (Assam) (after Volynkin et al. 2018) 10 S. (P.) dianensis sp. nov., male, holotype, China (Yunnan) 11 ditto, male, paratype, China (Yunnan) 12 S. (P.) zolotuhini, female, holotype, Vietnam (Gia Lai) (after Volynkin et al. 2018). Scale bars: 1 cm.

Figures 13–22. Male genitalia of Stigmatophora spp. 13 S. (Bifurcistigma) obraztsovi, genit. prep. no. ztt- 436-1 14 ditto, genit. prep. no. ztt- 435-1 15 S. (B.) bucseki sp. nov., holotype, genit. prep. no. ztt- 312-1 16 ditto, paratype, genit. prep. no. ztt- 313-1 17 S. (B.) longa sp. nov., holotype, genit. prep. no. wp- 90-1 18 ditto, paratype, genit. prep. no. wp- 89-1 19 S. (Stigmatophora) micans (after Volynkin et al. 2018) 20 S. (Pseudomiltochrista) zolotuhini (after Volynkin et al. 2018) 21 S. (P.) dianensis sp. nov., holotype, genit. prep. no. ztt- 391-1 22 ditto, paratype, genit. prep. no. ztt- 390-1. Scale bars: 1 mm.

Figures 23–26. Female genitalia of Stigmatophora spp. 23 S. (Bifurcistigma) obraztsovi, genit. prep. no. NSMT- 4743 24 S. (Bifurcistigma) bucseki sp. nov., paratype, genit. prep. no. ztt- 397-2 25 S. (Bifurcistigma) micans (after Volynkin et al. 2018) 26 S. (Pseudomiltochrista) zolotuhini (after Volynkin et al. 2018). Scale bar: 1 mm.