Coelocephalapion aculeatum

Fall

Coelocephalapion aculeatum is a flower-feeding weevil in the Brentidae (formerly Apionidae) that specializes on the weed Mimosa pigra. Females exhibit selective oviposition based on inflorescence developmental stage and damage levels. Larval development occurs entirely within host flowers, with survival rates varying significantly according to inflorescence maturity. The has been investigated as a potential agent for M. pigra in regions where this plant is invasive.

Pronunciation

How to pronounce Coelocephalapion aculeatum: /ˌsɛloʊsəfəˈleɪpiɒn ˌækjʊˈliːətəm/

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Diet

and larvae feed on flowers of Mimosa pigra. Larval development is confined to inflorescences, where they consume floral tissues.

Host Associations

Mimosa pigra - obligate Exclusive plant for both feeding and larval development; weevil is host-specific to this

Life Cycle

are laid into inflorescences of Mimosa pigra. Larvae develop within the flower , progressing through instars while consuming floral tissue. Larval survival and performance depend strongly on inflorescence developmental stage at oviposition. presumably occurs within the inflorescence, though this stage is not explicitly documented in available sources. emerge to feed and reproduce on new host flowers.

Behavior

Females assess inflorescence developmental stage before ovipositing, preferring intermediate stages that balance food availability with time for larval completion. avoid ovipositing in inflorescences already bearing or showing damage from feeding or oviposition, ceasing egg deposition when egg loads approach the larval of the flower . This oviposition deterrence appears based on direct assessment of damage cues rather than pheromonal signals.

Ecological Role

florivore that reduces reproductive output of its plant through flower consumption and larval destruction of developing inflorescences. Investigated as a agent to suppress of the weed Mimosa pigra.

Human Relevance

Studied as a potential agent for Mimosa pigra, a serious weed in Australia and other tropical regions. specificity testing has been conducted to evaluate safety for release. Predictions about its effectiveness as a control agent are informed by understanding of its oviposition and feeding .