LEPIDOPTERA
S A T Y R I D A E Boisduval, 1833
EREBIA Dalman, 1816
Erebia occulta Roos et Kimmich, 1983
Erebia occulta Roos et Kimmich, 1983
· TYPE LOCALITY. "150 km, Dempster Hwy., Yukon Territory" [Canada].
· SYNONYM: phellea Philipp et Troubridge, 1983.
· RANGE. From the Sayan Mts. to NE. Yakutia, Alaska and arctic Canada.
· DISTRIBUTION AND VARIATION. The E. Sayan Mts. - ssp. iltshira Belik, 1996; NE. Yakutia - ssp. jakuta Dubatolov, 1992; mountain tundras of S. Siberia - ssp. sokhondinka Dubatolov et Zintshenko in Gorbunov et Korshunov, 1995.
· TAXONOMIC NOTES. A revision of the occulta-group is required, as American specimens differ from the Far Eastern counterparts too much to name the latter occulta. In this case the name anyuica Kurentzov, 1966 might be useful, but its type material is lost and the description gives no reliable diagnostic characters.
· HABITAT AND BIOLOGY. Stony slopes up to 2,300 m a.s.l. Flight period: June-July.
· SIMILAR SPECIES. E. kozhantshikovi, E. dabanensis, E. fletcheri: UNH postdiscal band well-defined; UPF ocelli larger.
Table 1. Comparative features of the dabanensis-group males
Features |
Dabanensis |
Kozhantschikovi |
Occulta |
Troubridgei |
Fletcheri |
UPF band |
consists of separate spots |
consists of separate spots |
consists of separate spots |
consists of separate reduced spots |
broad, well-defined |
UPF ocelli |
4-5 round ocelli |
the first 2 ocelli larger and extended |
2-3 oblong ocelli, very small or absent |
the first 2 ocelli elongated but not larger the others |
4-5 oblong ocelli |
UNF band |
complete or slightly broken by veins |
complete, broken by veins |
consists of separate reduced spots |
consists of separate spots |
complete |
UNH band |
contrasting against silvery ground colour |
contrasting against silvery ground colour |
not contrasting |
little contrasting |
little contras-ting |
FW length |
21-23 mm |
20-22 mm |
22-25 mm |
20-22 mm |
22-24 mm |
Photo and text: Guide to the BUTTERFLIES OF RUSSIA and adjacent territories Volume 1. PENSOFT, Sofia - Moscow. 1997