Hylurgops palliatus

Wood & Bright, 1992

Hylurgops palliatus is a in the that colonizes coniferous trees, primarily spruce (Picea) and pine (Pinus) . It is a secondary bark beetle, meaning it attacks weakened, dying, or recently dead trees rather than healthy ones. The species uses -specific monoterpene chemical cues to locate and select appropriate host trees. It various , including ophiostomatoid species, which play roles in its and tree .

Habitat

Coniferous forests, particularly those containing spruce (Picea) and pine (Pinus) . Associated with the phloem layer of trees.

Distribution

Europe and Northern Asia (excluding China), North America, and Southern Asia. Documented in Poland on Pinus sylvestris.

Diet

Phloem of coniferous trees, primarily spruce (Picea) and pine (Pinus) .

Host Associations

Picea abies - primary Preferred ; responds to host-specific monoterpene cues from this
Pinus sylvestris - Documented in Poland; to this
Pinus sylvestris - Secondary ; responds to β-pinene and terpinolene from pine oleoresin

Behavior

selection is mediated by olfactory response to specific monoterpene compounds. Attracted to ethanol and host-specific oleoresins; response increases with myrtenol and decreases with (+)-trans-verbenol. Avoids volatiles from non-host conifers such as Larix decidua and Pseudotsuga menziesii. to host trees, with fungal differing between overwintered and gallery systems.

Ecological Role

Secondary that contributes to decomposition of weakened or dead conifers. Acts as a for fungal , including ophiostomatoid (Leptographium lundbergii, Ophiostoma minus, O. piceae, O. piliferum) and other ascomycetes, thereby influencing fungal transmission and tree dynamics.

Similar Taxa

Tomicus piniperdaBoth are that respond to monoterpene cues, but T. piniperda is primarily associated with Pinus sylvestris, prefers lower ethanol concentrations, and is attracted by both myrtenol and (+)-trans-verbenol, whereas H. palliatus is repelled by (+)-trans-verbenol.