Gerstaeckeria porosa

Cactus Weevil

Gerstaeckeria porosa, Cactus Weevils


Family: Curculionidae

Subfamily: Cryptorhynchinae

Tribe: Cryptorhynchini


Dr. Charles W. O'Brien comments: "I reared the species in numbers from the pincushion cactus Coryphanta vivipora. The weevils eat out the inner material leaving the epidermal shell covered with spines and pupate in cells, with 5 to 8 cells per cactus, inside of the crown just below the soil surface. The adults emerge in the spring in the Amarillo, Texas area." O'Brien also noted this photo is the first record of this species for Saskatchewan, and the second for Canada.

Photo data: 25 August 2012. Grasslands National Park, Saskatchewan.