Eversmannia Staudinger, 1871

Eversmannia Staudinger, 1871 View in CoL

Eversmannia Staudinger, 1871 View in CoL , in Staudinger & Wocke, Catalog der Lepidopteren des Europaeischen Faunengebiets: 159. Type species: Idaea exornata Eversmann, 1837 . Type locality: Kazan, Russia.

Diagnosis.

In external appearance, this genus is similar to Europlema Holloway, 1998 but can be distinguished by the following characters: (1) male genitalia: uncus hook- or spoon-shaped; valva bar-shaped, editum-costa complex bifurcate; in Europlema uncus triangular or lanceolate and covered with hair, valva triangular, transtilla long and curved; (2) female genitalia: papillae anales conical or hoof-shaped; ductus bursae long and tubular, membranous; in Europlema , papillae anales flat and broad; ductus bursae very short, sclerotized.

Description.

Adult. Head white; labial palpus up-curved; in some species male with plumose antenna, female antenna filiform. Thorax and tegula white. Forewing ground color white, with brown or black patches; subbasal line and postmedial line brown or black. Hindwing white, with brown or yellow patches; outer margin with short extension at Rs and M 3 veins. Abdomen covered with white scales.

Male genitalia. Uncus hook- or spoon-shaped, sclerotized. Gnathos trident- or spike-shaped. Tegumen triangular. Valva bar-shaped, covered with dense hair; costa long and strap-like, extending to cucullus. Editum-costa complex bifurcate, one branch short, finger-shaped, another long and bar-shaped. Juxta membranous, horseshoe-shaped. Vinculum V- or U-shaped. Saccus broad and V or U-shaped. Aedeagus cylindrical shaped, slightly curved or strongly curved; vesica with several spine-like cornuti.

Female genitalia. Papillae anales conical or hoof-shaped, covered with short setae. Apophysis posterioris longer than apophysis anterioris. Ostium bursae flat, sclerotized. Ductus bursae membranous, slightly curved or spiral. Corpus bursae oval or elongate and drop-shaped, in some species with separate tubular and globular parts; usually with variously shaped signum, sometimes absent.

Distribution.

China, Russia, Japan, North Korea, Bhutan, Nepal, India, Bangladesh, Finland, Estonia, Latvia, Lithuania, Belarus.