Astichus

Förster, 1856

Astichus is a of small in the Eulophidae, Entiinae. are associated with bracket fungi and woody polypores, where they develop as endoparasitoids of Ciidae beetles (minute tree-fungus beetles). The genus was first described by Förster in 1856 and has been recorded from the Nearctic, Palearctic, and Afrotropical regions. South African species exhibit distinctive coloration and patterning that separates them from in other regions.

Astichus minutus by the Smithsonian. Used under a CC0 license.Astichus minutus by the Smithsonian. Used under a CC0 license.Astichus minutus by the Smithsonian. Used under a CC0 license.

Pronunciation

How to pronounce Astichus: /ˈæstɪkəs/

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Identification

South African are distinguished from other regional Astichus by distinctive body coloration and patterning. A key to South African species has been published. In eastern North America, A. notus can be identified by its association with Polyporus betulinus and Ganoderma applanatum. Generic placement within Eulophidae requires examination of wing venation and other microscopic features; identification to species level typically requires reference to published keys and association with specific fungi.

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Habitat

Bracket fungi (polypores) and woody fungi, including Polyporus betulinus and Ganoderma applanatum. South African specimens have been collected from a variety of bracket fungi across many localities in the region.

Distribution

Recorded from Denmark, Norway, Sweden, United States, South Africa (first Afrotropical record), and eastern Canada. The South African record represents the first documentation of the from sub-Saharan Africa. GBIF records indicate presence in multiple countries, though comprehensive global distribution remains incompletely documented.

Host Associations

  • Ciidae - endoparasitoidMinute tree-fungus beetles that tunnel and live in bracket fungi
  • Polyporus betulinus - /substrateBirch bracket fungus from which A. notus was reared in eastern Canada
  • Ganoderma applanatum - /substrateWoody fungus (artist's conk) from which A. notus was reared in eastern Canada

Behavior

emerge from bracket fungi together with their Ciidae . The develop as endoparasitoids within Ciidae larvae or pupae tunneling in the fungal substrate.

Ecological Role

of Ciidae beetles in bracket fungi . Functions as a agent of minute tree-fungus beetles within decaying wood and fungal .

Similar Taxa

  • Other Eulophidae generaAstichus belongs to the Entiinae, which contains multiple of small with reduced wing venation. Generic distinction requires careful examination of morphological characters including antennal structure, mesosomal , and wing venation patterns.

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Sources and further reading