Rhagium mordax, the black-spotted longhorn beetle,[1] is a species of long-horned beetle.[2] This beetle is found throughout Europe and to Kazakhstan and Russia.[2] Larvae develop in silver fir, hazel, European weeping birch, European beech, and the European chestnut.[2] Ischnoceros rusticus is an ichneumonid parasitoid wasp that feds on Rhagium mordax larvae.[2]

Description

Rhagium mordax grows from 13 to 26 millimetres (0.51 to 1.02 in) long.[3][4]: 97  In colour, they are mixed ochre and black, with one black splotch on each elytron accompanied by two pale lines on either side.[5] The beetles' bodies are covered with small yellow hairs,[6] although one distinguishing feature of the species is two bald spots on its elytra.[7]

Rhagium mordax has a long, narrow head with a distinct neck. The insect's face bears a suture and the temples are elongate with some stiff hairs. The antennae are relatively short and the first segment is wider at its tip and longer.[8]

Taxonomy

Rhagium mordax was first named Leptura mordax by Charles De Geer in 1775.[9]

Subtaxa

There are five formally described varieties:[2]

  • 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

  1. ^ "Longhorn Beetles | Great Fen". www.greatfen.org.uk. Retrieved 2018-07-21.
  2. ^ a b c d e BioLib Taxon profile — species Rhagium mordax (DeGeer, 1775)
  3. ^ "Rhagium mordax". www.cerambyx.uochb.cz. Retrieved 2025-01-28.
  4. ^ Cherepanov, A. I.; Cherepanov, A. I.; SSSR), Biologicheskiĭ institut (Akademii︠a︡ nauk; States, United; States, United (1988). Cerambycidae of Northern Asia. Vol. v.1 (1988). New Delhi: Translated and published under an agreement for the U.S. Dept. of Agriculture, Washington, D.C., by Amerind Pub. Co.
  5. ^ "Black-spotted longhorn beetle | Surrey Wildlife Trust". www.wildlifetrusts.org. Retrieved 2025-01-28.
  6. ^ Hofmann, Ernst (1908). The young beetle-collector's handbook. London: S. Sonnenschein & Co., lim. p. 150.
  7. ^ Riggall, E.C. (1951). Baker, F.T.; Roebuck, A. (eds.). "Coleoptera". Transactions / Lincolnshire Naturalists' Union. 12 (4). Lincolnshire Naturalists' Union: 206.{{cite journal}}: CS1 maint: date and year (link)
  8. ^ Cherepanov, A. I.; Cherepanov, A. I.; SSSR), Biologicheskiĭ institut (Akademii︠a︡ nauk; States, United; States, United (1988). Cerambycidae of Northern Asia. Vol. v.1 (1988). New Delhi: Translated and published under an agreement for the U.S. Dept. of Agriculture, Washington, D.C., by Amerind Pub. Co.
  9. ^ "Leptura mordax Degeer, 1775". www.gbif.org. Retrieved 2025-01-28.


Allikas: https://en.wikipedia.org/wiki/Rhagium_mordax
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