H. ligniperda is a small beetle about 2 mm wide by 4-6 mm long, black and covered with rather long reddish hairs. The hairs are particularly visible on the rear slope of the wing covers (elytra). The distinctive, dense hairs are quite thick and appear notches in the extensions below x80. The elytral apex is convex with a slight indentation and has no teeth or other armor.
As far as we know, the beetle grows exclusively in the bark of unhealthy Pinus, usually in the thick bark near the base of the stem or in large exposed roots (Brown and Laurie, 1968). Strains, cuttings and trunks are also used for breeding.