16.02. Polygraphus subopacus (Thomson, 1871)
Presence
E: AU BE CT CZ EN FI FR GE HU IT LA NR NT PL SL* SK SV SZ YU
A: ES FE HEI JA JIL MG NC SC WS
Figure NN: Polygraphus subopacus (Photo: Maja Jurc)
Older catalogs and keys – citations of name
Grüne 1979: Polygraphus subopacus Thomson, 1871; Freude, Harde, Lohse 1981: Polygraphus subopacus Thomson; Pfeffer 1995: P. subopacus Thomson.
Ecology and presence in Slovenia
The species is distributed in high mountains and peat bogs in central, northern and eastern Europe, the European part of the former Soviet Union, Siberia, Korea and Japan. Titovšek (1988) states that the species is present in Slovenia, but information on the location, host and date of record is not known. The literature lists Picea abies, P. obovata, P. jezoensis, Pinus korainensis and P. pumila as hosts. Less frequently, it also inhabits Pinus sylvestris, P. montana, P. cembra, P. maritima, P. strobus, Abies alba and Larix sibirica. It attacks standing trees, develops only one generation per year, swarming in June and July. The tunnel system is star-shaped. Adult length is 1.7-2.3 mm. The forehead is finely and densely punctated, densely hairy in females. The neck shield is not hairy, it is covered in scales and coarsely punctated in males.