01.07. Hylastes opacus (Erichson, 1836)
Presence
E: AU BE BU BY CT CZ DE EN FI FR GB GE GR HU IR IT LA LS LT MC NR NT PL SK SL ST SV SZ YU
A: ES FE JA KZ MG NC SC WS »Mandžurija«
NAR
Figure 15: Hylastes opacus, dorsal, lateral (Photo: Maja Jurc)
Older catalogs and keys – citations of name
Siegel 1866: Hylastes opacus Er.; Grüne 1979: H opacus Erichson, 1836; Freude, Harde, Lohse 1981: H. opacus Erichson; Lucht 1987: H. opacus Er., 1836; Pfeffer & Knížek 1993: H. opacus Erichson, 1836; Pfeffer 1995: H. opacus Erichson, 1836.
Figure 16: Hylastes opacus, distribution map according to historical and recent data
Ecology and presence in Slovenia
It is distributed in northern, central and eastern Europe, Asia and the Nearctic. In Finland, its range extends to 65° N (EPPO). Siegel (1866) states that the species is “not rare in Carniola, mostly under pine and spruce bark”. The few older records before 1951 are restricted to the central part of Slovenia. More recent sites are mainly in Gorenjska and the Slovene part of Istria (Figure 16), in both regions specimens were trapped with traps. Hosts include Pinus spp., less frequently Picea abies, P. obovata, exceptionally Larix decidua. In Slovenia (Notranjska), Picea abies is the only recorded host. It produces two generations per year, swarming in March and in June and July. Adult length is 2.9-3.5 mm. The body colour is black, the elytra are matte, the frontal shield is without a medial crest (Figure 15).