New York weevil

New York weevil
New York weevil
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Coleoptera
Suborder: Polyphaga
Superfamily: Curculionoidea
Family: Brentidae
Subfamily: Ithycerinae
Genus: Ithycerus
Species: I. noveboracensis
Binomial name
Ithycerus noveboracensis
Forster, 1771

The New York weevil (Ithycerus noveboracensis) is a species of primitive weevil; large for weevils (12-18 mm), it is covered with fine bristles and has a regular pattern of light and dark spots. It occurs in the eastern United States and southern Canada.

The rostrum (snout) is broad and stout, while the antennae are straight and thin, with the final three antennomeres making a small club.

This weevil is found in association with various plants of Fagaceae, Betulaceae, and Juglandaceae, in particular white oak and American beech. Adults feed on new growth and other soft parts, such as leaf petioles and buds. They lay their eggs in the ground, and the grubs then eat the roots of the same plants.

Though originally placed in Curculionidae, coleopterists have long agreed that Ithycerus belongs in a different family, as it does not have elbowed antennae, a characteristic of true weevils. It has been traditionally considered as the only species in its own family, Ithyceridae, but more recent classifications place it as the sole member of the subfamily Ithycerinae in the family Brentidae.


  • Robert S. Anderson, "Ithyceridae", in Ross H. Arnett, Jr. and Michael C. Thomas, American Beetles (CRC Press, 2002), vol. 2
  • M. Sanborne, "Biology of Ithycerus noveboracensis (Forster) (Coleoptera) and weevil phylogeny", Evolutionary Monographs 4: 1-80 (1981)

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