Acanthocinus aedilis mating · ilgaūsis pušiagraužis poruojasi «Acanthocinus aedilis mating · ilgaūsis pušiagraužis poruojasi^Thumbnails»Acanthocinus aedilis · ilgaūsis pušiagraužis«Acanthocinus aedilis mating · ilgaūsis pušiagraužis poruojasi^Thumbnails»Acanthocinus aedilis · ilgaūsis pušiagraužis

Acanthocinus aedilis mating · ilgaūsis pušiagraužis poruojasi

on Pinus sylvestris - ant paprastosios pušies

  • Timberman Beetle, Siberian Timberman
  • Almindelig tømmermand
  • Zimmermannsbock, Zimmerbock, Schneiderbock
  • ilgaūsis pušiagraužis
  • priežu koksngrauzis, priežu malkcirtis
  • dennenboktor, timmerboktor, timmerbok
  • tycz cieśla

Kūnas 12-20 mm ilgio, trumpas, plokščias, platus, rudas, apaugęs pilkšvais plaukeliais. Turi labai ilgas antenas, patinų trečdaliu ilgesnės. Antsparniai su dviem įžambiais siaurais, šviesiai rudais skersiniais raiščiais. Vabalai skraido balandžio – gegužės ir rugpjūčio – rugsėjo mėnesiais. Lervos gyvena po spygliuočių žieve.

Subfamily: Lamiinae · niūrūnėnai

It is found in woodlands, with a large distribution through Europe, Russia and Central Asia. The body length ranges from 12-20 mm, with antennae up for 3 times the body length in males, or 1.5 times the body length in females. Their lifespan is up to 3 years which includes the 1–2 years spent in the larval stage. This species is capable of surviving freezing temperatures below -37°C in both the adult and larval stages. The adults are active from March to June, during which they are diurnal. The adults overwinter in pupal chambers in leaf litter or under the bark. In Continental Europe, this species has become a serious pest of commercially grown timber as the larvae feed under the bark, weakening the trees.

Most of the text below is from now defunct site www.ukbeetles.co.uk, where it was published under a CC BY 4.0 License.

This cerambycid is more widely known as The Siberian Timberman as its range extends far north into Siberia and the species is adapted to survive extremely cold conditions. Unlike other longhorn beetles both adults and larvae are tolerant to freezing and, in the frozen condition, will survive cooling to below -37°C. More generally the species is very widely distributed, throughout Europe including Scandinavia, Caucasian Mountains and east to Siberia, Mongolia, China and Korea. In northern Europe it tends to be generally common and, in many places abundant. In the UK there are records scattered through England, Wales and Scotland although they tend to be coastal in the west. The U.K. stronghold is the Scottish Highlands and it is likely that many of the records scattered elsewhere are the result of the commercial movement of timber.

The spectacular adults are active from March to June or, exceptionally, into July. They are diurnal and active on pine logs in sunshine when males can be seen fighting head-to-head, rapidly pushing each other around until one backs down and leaves the area. They are strong fliers and quick to invade new areas. The main host is pine but other conifers e.g. Picea are occasionally attacked. In general they infest dead, recently felled or weakened trees, stumps or thick branches and they prefer lower parts where the bark is thick, and adults emerge from oval emergence holes about 6-8 mm x 3-4 mm wide. On the continent the species sometimes becomes a serious pest of commercially grown timber, traps are available for their control, and areas of felled forest may have the bark stripped from residual stumps as a preventative measure. Females find bark crevices or chew depressions into the wood before inserting the elongate, white eggs using the ovipositor as a drill to do so. Larvae feed under the bark forming irregular broad galleries several centimetres long and up to three centimetres wide, at first these galleries are filled with shredded bark but later on with white wood chips. The larvae are distinctive; up to four centimetres long, legless and slightly flattened, the overall colouration is creamy or yellowish white with two yellow spots on the pronotum. After about four months of development, they pupate in chambers constructed within the bark or, if the bark is thin, within the surface heartwood. The pupa is distinctive, displaying the adult morphology. Adults eclose after two or three weeks and overwinter within the pupal cell.

12-20 mm body length. A medium sized longhorn, subparallel and depressed dorsally, pale reddish grey or brown with two transverse macula on the elytra which are sometimes very pale and indistinct. Entire upper surface with short, recumbent pubescence and the elytra have small and random tufts of darker setae. The head is small with the anterior face virtually flat. The antennae are very long; up to three times the body length in the male and one and a half times in the female. Antennal segments bicoloured; dark brown apically and pale towards the base. Pronotum transverse with a large lateral spine just behind the middle. Four pale spots form a transverse row in the apical third. Elytra flat and subparallel; evenly curved to the apex. Longitudinal ridges usually visible, coarsely and almost densely punctured in basal half, more finely and sparsely apically. Transverse marks sometimes indistinct; the one behind the middle is usually more obvious and sometimes the entire elytra behind this mark are dark. The female has a conspicuous elongate and truncate ovipositor.

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