Eversmannia bicaudata (Moore, [1868]), 2025

Han, Ming-Xu & Han, Hui-Lin, 2025, A taxonomic review of the genus Eversmannia Staudinger, 1871 (Lepidoptera, Uraniidae) from China, with descriptions of three new species and three new combinations, ZooKeys 1251, pp. 275-291 : 275-291

publication ID	https://doi.org/10.3897/zookeys.1251.145353
publication LSID	lsid:zoobank.org:pub:DA227531-72F0-4920-8147-6F703280FDCC
DOI	https://doi.org/10.5281/zenodo.17095345
persistent identifier	https://treatment.plazi.org/id/F286C5B1-F31D-5CB9-8A88-A6068B0E53A1
treatment provided by	ZooKeys by Pensoft
scientific name	Eversmannia bicaudata (Moore, [1868])
status	comb. nov.

Treatment

Eversmannia bicaudata (Moore, [1868]) comb. nov.

Figs 3 View Figures 1–14 , 4 View Figures 1–14 , 16 View Figures 15–21 , 23 View Figures 22–28 , 32 View Figures 29–39

Acidalia bicaudata Moore 1868: 643, pl. 33: 12. Type locality: Darjeeling, India; Type specimens: in coll. NHMUK Geometroidea - Uraniidae - Epipleminae - 419-038892.

Idaea bicaudata : Cotes et al. 1888 (1887–1889): 576.

Erosia bicaudata : Butler 1889: 16.

Dirades bicaudata : Swinhoe 1894: 166.

Epiplema bicaudata : Hampson 1895: 130, fig. 71; Warren 1896: 349; Leech 1897: 186; Gielis et al. 2022: 67, pl. 67.

Epiplema fuscifrons : Inoue 1998: 81, pl. 138 fig. 4; Singh and Lekhendra 2024: 121 (2) (misidentified).

Material examined.

China – Jiangxi Prov. • 1 ♀; Jinggangshan City, Luofu Reservoir ; 18 Sep. 2010; DD. Zhang & S. Zhao & B. Tong leg.; genit. prep. hmx- 99-2; SYSU • 1 ♀; Shangrao City, Sanqingshan Scenic Area ; 18 Jun. 2010; L. Shi leg.; SYSU . – Xizang Autonomous Region • 4 ♂♂; Motuo County, Beibeng Township ; 31 Jul. 2018; MJ. Qi leg.; genit. prep. hmx- 161-1, hmx- 220-1; NKU • 3 ♂♂, 1 ♀; Motuo County, Beibeng Township, Jiagagou Bridge ; 9 Jun. 2021; H. Liu leg.; genit. prep. hmx- 12-1, hmx- 13-1, hmx- 17-1; IZCAS • 3 ♀♀; Xigaze City, Chentang Town ; 25 Jun. 2021; H. Liu leg.; genit. prep. hmx- 14-2, hmx- 15-2, hmx- 42-2; IZCAS • 2 ♂♂, 2 ♀♀; Motuo County; 5–6 Jun. 2021; HL. Han & JJ. Fan & J. Wu leg.; genit. prep. hmx- 140-1, hmx- 141-1, hmx- 142-2; NEFU . – Fujian Prov. • 1 ♀; Jianou City, Wanmulin Nature Reserve ; Apr. 1985; SHNU . – Anhui Prov. • 1 ♂; Lu’an City, Shucheng County, Wanfoshan National Forest Park ; 18 Aug. 2022; JX. Wang & P. Yu leg.; genit. prep. hmx- 279-1; HGNU .

Redescription.

Adult (Figs 3 View Figures 1–14 , 4 View Figures 1–14 , 32 View Figures 29–39 ). Forewing length: 7.5–10 mm in male, 9–12 mm in female. Head: white; labial palpus up-curved; antenna filiform. Thorax and abdomen white. Forewing ground color white; antemedial line rust-colored, discontinuous; postmedial line double, brown, waved; subterminal and terminal area with gray patches. Hindwing white; antemedial line rust-colored, discontinuous; postmedial line double, brown, wavy; marginal shade brownish red; outer margin with two short tails; terminal line present as a small dot at M 3 - Cu 1.

Male genitalia (Fig. 16 View Figures 15–21 ). Uncus spoon-shaped, sclerotized. Tegumen triangular. Gnathos sclerotized, present as two curved blades. Valva fan-shaped, covered with dense hair; sacculus small, arcuate; editum-costa complex bifurcate, one branch short and finger-shaped, covered with short setae, other branch long and bar-shaped; cucullus rounded. Juxta membranous, horseshoe-shaped with a narrow V-shaped thin area at centre. Vinculum V-shaped. Saccus V-shaped. Aedeagus cylindrical, slightly curved. Vesica membranous, with several spine-like cornuti.

Female genitalia (Fig. 23 View Figures 22–28 ). Papillae anales hoof-shaped, covered with short setae. Ostium bursae flat, sclerotized. Ductus bursae long and slender. Corpus bursae membranous, oval, with several spine-like cornuti from the male; signum on dorsal, sclerotized, oblong.

Distribution.

China ( Anhui, Fujian, Jiangxi, Yunnan, Xizang) (Fig. 40 View Figure 40 ), Bhutan, India, Nepal, Bangladesh.

Remarks.

This species was formerly placed in the genus Epiplema . However, it shares several typical characters with Eversmannia : (1) forewing ground color white; postmedial line double; crossvein extremely weak; (2) hindwing white; postmedial line double; M 2 vestigial, forming crease; (3) editum-costa complex bifurcate; (4) corpus bursae oval.

Eversmannia bicaudata comb. nov. shows significant differences from the type species of the genus Epiplema , E. acutangularia Herrich-Schäffer, 1855 : (1) wing ground color of white; in E. acutangularia , grayish brown; (2) outer margin of forewing smooth; in E. acutangularia , dentate; (3) in male genitalia, gnathos present as two blades, editum-costa complex bifurcate; in E. acutangularia , gnathos and editum-costa complex absent. Consequently, we formally transfer this species to the genus Eversmannia .