Cynaeus angustus

(LeConte, 1851)

Larger Black Flour Beetle

Cynaeus angustus is a North that has become an stored grain pest with established across Europe and Russia. It feeds on corn, wheat, sorghum, soybeans, and peanuts. The shows high with continuous development under favorable conditions and increasing content through its . It serves as to the cynaea.

CSIRO ScienceImage 11055 Cynaeus angustus Larger black flour beetle by division, CSIRO. Used under a CC BY 3.0 license.Cynaeus opacus Champion, 1886; NHMUK014006271; Labels by NHM Beetles and Bugs. Used under a CC BY 2.0 license.Cynaeus angustus (10.3897-zookeys.728.20602) Figure 35 by Bousquet Y, Thomas DB, Bouchard P, Smith AD, Aalbu RL, Johnston AM, Steiner WE Jr (2018) Catalogue of Tenebrionidae (Coleoptera) of North America. ZooKeys 728: 1-455. https://doi.org/10.3897/zookeys.728.20602. Used under a CC BY 4.0 license.

Pronunciation

How to pronounce Cynaeus angustus: /saɪˈniːəs æŋˈɡʌstəs/

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Habitat

Stored grain environments including grain elevators, warehouses, and food processing facilities. In Europe, collected along the Danube River in Bulgaria, suggesting riverine transport corridors facilitate spread.

Distribution

to North America with records from Canadian provinces (Alberta, British Columbia, Manitoba, Ontario, Quebec). to Europe: first recorded in Romania, Russia (Belgorod Province), Ukraine (Lugansk and Kharkov Provinces), and Bulgaria (2020-2022 along Danube River).

Diet

Corn, wheat, sorghum, soybeans; peanuts accepted under laboratory conditions. No confirmed records of feeding on peanut in natura.

Host Associations

  • Nosema cynaea - ; -parasite relationship described in 1950 dissertation

Life Cycle

Developmental stages: , , . Continuous development occurs under favorable laboratory conditions. content increases through development: larvae 38.22 mg/mL, pupae 47.53 mg/mL, adults 60.00 mg/mL. Electrophoretic protein variety ranges 29-700 kDa across stages.

Ecological Role

Pest of stored grain products. High initial survival rates and enable rapid growth in facilities. Potential nutritional source for based on content, though this application remains theoretical.

Human Relevance

Economic pest of stored grains and oilseeds. status in Europe triggers and control efforts. Methods for control have been outlined in Bulgarian records.

Similar Taxa

  • Other Tenebrionidae stored product pestsShared in grain ; C. angustus distinguished by larger size, black coloration, and specific association with larger grain particles
  • Tribolium spp.Both are ; C. angustus is larger and darker, with different feeding preferences for intact grains versus damaged grain products

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