Information: Tragosoma depsarium a widely distributed Palaearctic species living in the montane coniferous forests. Until 2017, this beetle was considered a Holarctic species, but according to a study by Serge Laplante, the North American populations were newly described as separate taxa.
Tragosoma depsarium develops on trees from the pine genus (Pinus spp.) and also on Norway spruce (Picea abies). The larvae feed on decaying wood, typically of dead, fallen logs, and occasionally in old tree stumps. During the day, it hides under the bark, in various crevices or under logs. They are active at night, when they come out of their hiding places and climb logs. In Central Europe, it is considered one of the rarest species of longhorn beetles.
Body length: 16 - 36 mm
Peak activity: June - August
Remarks: Larvae of this species develop in decaying dead wood of various conifers, but they prefer Pinus ssp. (Cherepanov 1979; Švácha 1986). They usu-ally live in thick, debarked trunks lying on the ground (Ehnström and Axelsson 2002). The life cycle lasts at least three years (Švácha 1986; Bíly and Mehl 1989). Pupation takes place in wood in June or early July, and adults emerge in late June to August (Švácha 1986). They are nocturnal, do not feed, and can be attracted to artificial light (Bíly and Mehl 1989; Lindhe et al. 2010)
Distribution: Albania, Andorra, Austria, Bosnia Herzegovina, Bulgaria, Belarus, Croatia, Czechia, Estonia, Finland, France, Germany, Greece, Italia, Latvia, Liechtenstein, Lithuania, Macedonia, Norway, Poland, Russia, Slovakia, Spain, Sweden, Switzerland, Ukraine, Serbia and Montenegro, Siberia
Zoogeographic region: Palearctic
Taxonomic classification:
Atlas of the Cerambycidae of Europe and Mediterranean Area | Sama 2002
Material examined (& observation):
Our observation period: Jul ~ August
Sampling Methods: at night on old wood 
AustriaLonghorn beetles (Cerambycidae) of the West Palaearctic region
Coleoptera Cerambycidae Prioninae Tragosoma depsarium
Prioninae of the world (Jiří Pirk) - photos of the type material
Prioninae of the world
Longicorn beetles (Cerambycoidea) of Russia and adjacent countries. Part 1., Danilevsky 2014.pdf
