Anthrenus fuscus

Olivier, 1789

Mill Carpet Beetle

Anthrenus fuscus is a small carpet beetle in the Dermestidae, commonly known as the Mill Carpet Beetle. It occurs in North America and Europe, with in southern Britain showing peak abundance near agricultural areas. are found on flowers during summer months, while larvae feed on dead insects in natural such as spiders' webs and under tree bark. The exhibits sharply defined habitat separation from the closely related A. verbasci.

Anthrenus fuscus by (c) janet graham, some rights reserved (CC BY). Used under a CC-BY license.Anthrenus fuscus by (c) Stephan Mende, some rights reserved (CC BY), uploaded by Stephan Mende. Used under a CC-BY license.Anthrenus fuscus 394223692 by Joeb. Used under a CC BY 4.0 license.

Pronunciation

How to pronounce Anthrenus fuscus: /ænˈθriːnəs ˈfʌskəs/

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Identification

are small (2–4 mm), round beetles with patterned . Distinguished from A. verbasci by preferences and distribution patterns; A. fuscus peaks in farm vicinities while A. verbasci dominates suburban southeast England. Often found in association with A. museorum, though in smaller numbers. Larvae feed on dead insects rather than occupying dry birds' nests typical of A. verbasci.

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Habitat

Larvae occur in natural including dead insects around spiders' webs and under tree bark. are found on attractive flowers, particularly hogweed (Heracleum sphondylium), during June and July. Shows sharply defined habitat separation from A. verbasci, with very rare cross-habitat occurrence.

Distribution

North America and Europe. In Britain, generally distributed across all locality types in the south with peak abundance near farms; diminish rapidly northward.

Seasonality

active on flowers during June and July.

Diet

Larvae feed on dead insects.

Behavior

sharply defined from A. verbasci; rarely occurs in habitats typical of that . Often accompanied by A. museorum in small numbers.

Human Relevance

Larvae may occur in indoor environments where dead insects accumulate. Less frequently associated with stored products or household damage compared to some .

Similar Taxa

  • Anthrenus verbasciOverlapping distribution in Britain but occupies sharply different ; A. verbasci characteristically inhabits dry birds' nests while A. fuscus feeds on dead insects around spiders' webs and under bark. A. verbasci occurs in large numbers only in suburban southeast England, whereas A. fuscus peaks near farms.
  • Anthrenus museorumCommonly confused that often accompanies A. fuscus in small numbers in the same and geographic areas.
  • Anthrenus polonicusEuropean with similar appearance and overlapping distribution range.
  • Anthrenus minutusKnown from Portugal and Spain with similar appearance and overlapping distribution range.

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Sources and further reading