''Rhagium mordax'', the black-spotted longhorn beetle, is a species of

long-horned beetle The longhorn beetles (Cerambycidae), also known as long-horned or longicorns, are a large family of beetles, with over 35,000 species described. Most species are characterized by extremely long antennae, which are often as long as or longer than ...

.BioLib
Taxon profile — species ''Rhagium mordax'' (DeGeer, 1775) This beetle is found throughout Europe and to Kazakhstan and Russia. Larvae develop in silver fir,

hazel The hazel (''Corylus'') is a genus of deciduous trees and large shrubs native to the temperate Northern Hemisphere. The genus is usually placed in the birch family Betulaceae,Germplasmgobills Information Network''Corylus''Rushforth, K. (1999). ...

, European weeping birch, European beech, and the European chestnut. '' Ischnoceros rusticus'' is an

ichneumonid The Ichneumonidae, also known as the ichneumon wasps, Darwin wasps, or ichneumonids, are a family (biology), family of parasitoid wasps of the insect order Hymenoptera. They are one of the most diverse groups within the Hymenoptera with roughly 2 ...

parasitoid wasp that feds on ''Rhagium mordax'' larvae.

Subtaxa

There are five formally described varieties: * ''Rhagium mordax'' var. ''altajense'' Plavilstshikov, 1915 * ''Rhagium mordax'' var. ''klenkai'' Heyrovský, 1914 * ''Rhagium mordax'' var. ''mediofasciatum'' Plavilstshikov, 1936 * ''Rhagium mordax'' var. ''morvandicum'' Pic, 1927 * ''Rhagium mordax'' var. ''subdilatatum'' Pic, 1917

References

Lepturinae Beetles described in 1775 Taxa named by Charles De Geer {{Lepturinae-stub