Plusiocampa (Stygiocampa) bureschi Silvestri, 1931

Plusiocampa bureschi Silvestri, 1931b: 100, figs iii–v.

Plusiocampa (Stygiocampa) rauseri Rusek, 1965: 94, figs 18–24.

Diagnosis (Silvestri 1931b; Condé 1955a, 1959; Condé & Bareth 1996; Bareth & Condé 2001)

Troglomorphic species. Antennae with 39–54 antennomeres; seven to nine complex olfactory chemoreceptors in cupuliform organ. Pronotum with 1+1 ma, 2+2 la, 2+2 lp macrosetae; mesonotum with 1+1 ma, 1+1 lp macrosetae; metanotum without macrosetae; long, barbed notal macrosetae; abundant notal clothing setae. No ventral tibial macrosetae; slightly unequal claws (1.1) with large lateral crests, posterior claw with a small backward overhang. Urotergite VII with 2+2 post macrosetae; urotergite VIII with 4+4 post macrosetae; abdominal segment IX with 6+6–7+7 post macrosetae; urosternite I with 7+7, urosternites II–VII with 5+5, urosternite VIII with 2+2 macrosetae. Male without glandular g 1 setae, subcylindrical slightly enlarged appendages with glandular a 1 setae; female with subcylindrical appendages with glandular a 1 setae. Spermatozoid fascicles 50 µm in diameter, 25 µm wide; wheels with 3½ turns of 300–350 µm and 5.6 µm diamter filament.

Habitat and distribution

Subterranean species found in 13 caves in a karst region on the left bank of the Iskar River, Sofia District, Balkan Mountains, Bulgaria.