Coelocephalapion eriogoni
Coelocephalapion eriogoni is a of in the Brentidae, Apioninae. The Coelocephalapion comprises small weevils associated with specific plants, and this species is known from associations with Eriogonum (wild buckwheat) species. Like other apionine weevils, it likely exhibits a narrow host range tied to its larval development within plant tissues.
Pronunciation
How to pronounce Coelocephalapion eriogoni: //ˌsiːloʊˌsɛfəˈleɪpiən ˌɛraɪˈoʊɡoʊnaɪ//
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Identification
Distinguished from other small weevils by the straight (non-geniculate) and elongated, non-elbowed rostrum typical of Brentidae. Within Apioninae, Coelocephalapion are separated from related by rostral and antennal proportions, though specific diagnostic characters for C. eriogoni require examination of . Distinguished from Curculionidae (true weevils) by the straight rather than elbowed antennae.
Appearance
Small weevil, likely 2–4 mm in length based on characteristics. Possesses the elongated, straight rostrum (snout) characteristic of Brentidae, with inserted near the middle of the rostrum. Body form is compact and somewhat cylindrical. Coloration and specific sculpturing details are not well documented in accessible literature.
Habitat
Associated with Eriogonum plants in arid and semi-arid western North American , including sagebrush steppe, pinyon-juniper woodlands, and dry montane slopes.
Distribution
Western North America; recorded from California and adjacent states where Eriogonum occur.
Host Associations
- Eriogonum - larval of wild buckwheat (Polygonaceae); specific not confirmed in accessible sources
Ecological Role
As a seed or stem borer, likely contributes to of Eriogonum plants. May serve as prey for and .
Similar Taxa
- Apioninae (other genera)Other small apionine weevils share similar size and general form; require examination of rostral proportions, antennal insertion, and male genitalia for definitive separation
- Curculionidae (true weevils)Superficially similar small weevils, but distinguished by geniculate (elbowed) and usually shorter, stouter rostrum
More Details
Taxonomic Note
The Coelocephalapion was established to accommodate previously placed in Apion sensu lato, reflecting revised understanding of apionine . Species-level in this group remains challenging and may require molecular and morphological revision.