Rhagium (Megarhagium) mordax (De Geer, 1775)

Subfamilia: LEPTURINAE  /  Tribus: RHAGIINI

Rhagium mordax
[Photo © M.Hoskovec]

Rhagium mordax
[Photo © Kirill V. Makarov, click on the picture for 4K resolution]

Rhagium mordax, a taxon occurring from the Iberian Peninsula to Siberia, is one of the most common longhorn beetles of the Euro-Asian forest zone. It is a species of deciduous, mostly beech, but often also coniferous forests. Development under the bark of freshly felled/dead trees, stumps, or in residues after logging. Pupation and hatching under the bark (in typical circular pupal cells made from wood splinters) during late summer before the second overwintering, life-cycle 2 years. Adults, active from April to August (peak in May-June), can be found on the host trees as well as on flowers (e.g. Sorbus, Viburnum, Sambucus, Aruncus, Apiaceae) [✧][❖].

Body length:13 - 23 mm
Life cycle:2 - 3 years
Adults in:May - July
Host plant:polyphagous in deciduous trees (Fagus, Alnus, Tilia, Quercus, Castanea, Betula, Populus, Acer etc.), also in conifers (Abies, Picea, Pinus)
Distribution:Europe, Russia (including West Siberia), Caucasus, NE Kazakhstan

The depicted living beetles were: (MH) beaten from blossoming hawhorn (Crataegus) in Velký Osek (Central Bohemia, Czechia); (ML) found in Křivoklátsko Protected Landscape Area (Central Bohemia, Czechia).

The depicted mounted female beetle was collected using window trap in Pavlovskaya Sloboda (Павловская Слобода) village environs (N55°47′57″ E37°4′26″; Istrinsky district, Moscow oblast, Russia) on June 9-13, 2020.

Collected by M.Hoskovec, Miroslav Polcar and Kirill V. Makarov

Danilevsky M.L.:
Longicorn beetles (Coleoptera, Cerambycoidea) of Russia and adjacent countries. Part 1.
Higher School Consulting, Moscow, 550pp [pages 82-83], 2014. [download pdf icon]

Sláma M.E.F.:
Tesaříkovití – Cerambycidae České republiky a Slovenské republiky / Cerambycidae of the Czech Republic and Slovak Republic.
Milan Sláma private printing, Krhanice, 383pp [pages 193], 1998 [ISBN: 80-238-2627-1].
[download pdf icon]

Rhagium mordax
Rhagium mordax
Rhagium mordax
[Photo © Milan Lovětínský]

Rhagium mordax
Rhagium mordax
[Photo © M.Hoskovec]

SubfamiliaLepturinae Latreille, 1802
TribusRhagiini Kirby, 1837
GenusRhagium Fabricius, 1775
SubgenusMegarhagium Reitter, 1913
SpeciesRhagium (Megarhagium) mordax (De Geer, 1775)