Trichapion rostrum

Trichapion rostrum, the baptisia seed pod weevil or wild indigo weevil, is a species of weevil in the family Brentidae.[1]

Trichapion rostrum
Adult
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Coleoptera
Family: Brentidae
Genus: Trichapion
Species:
T. rostrum
Binomial name
Trichapion rostrum
(Say, 1826)

Description

Adult is entirely black. Its namesake elongated snout is called a rostrum, and has antennae attached near its base.[2]

Ecology

Adult females deposit eggs in seedpods of wild indigo (genus Baptisia) plants;[3] the larvae feed on seeds in the pods.[4][5]

Seed predation by weevils can adversely affect reproduction of the Baptisia host.[6]

  • Female ovipositing
  • Eggs
  • Larvae

References
  1. "Trichapion rostrum (Baptisia Seed Pod Weevil)". iNaturalist.
  2. "Trichapion rostrum (Say, 1826)". Symbiota Collections of Arthropods Network.
  3. Whitehouse, Ryan J. (28 November 2018). "Trichapion rostrum (Say) (Brentidae: Apioninae) Infestation of Baptisia alba (L.) Vent. in Mississippi". Transactions of the American Entomological Society. 144 (3): 559–564. doi:10.3157/061.144.0306.
  4. "Species Trichapion rostrum - Wild Indigo Weevil". BugGuide. Iowa State University.
  5. Downie, N.M.; Arnett, R.H. (1996). The Beetles of Northeastern North America, Vol. 1 and 2. Gainesville, FL: The Sandhill Crane Press. ISBN 1877743119.
  6. Hembrough, Ashley M; Borowicz, Victoria (April 2017). "Pre-dispersal seed predation by the weevils Trichapion rostrum and Tychius sordidus limits reproductive output of Baptisia alba (Fabaceae)". Botany. 95 (8): 809–817. doi:10.1139/cjb-2016-0329.


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