Ithycerinae

Pronunciation

How to pronounce Ithycerinae: /ˌɪθɪˈsɛrɪniː/

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Summary

Ithycerinae is a subfamily consisting of a single species, Ithycerus noveboracensis, which is recognized as a distinct lineage apart from true weevils. This primitive weevil is notable for its size, distinctive appearance, and specific feeding habits associated with select plant families.

Physical Characteristics

Large for weevils, measuring 12–18 mm. Covered with fine bristles and exhibits a regular pattern of light and dark spots. Broad and stout rostrum.

Identification Tips

Look for straight and thin antennae with the final three antennomeres forming a small club; lacks geniculate (elbowed) antennae that are characteristic of true weevils.

Habitat

Found in association with various plants of Fagaceae, Betulaceae, and Juglandaceae, particularly white oak and American beech.

Distribution

Eastern United States and southern Canada.

Diet

Adults feed on new growth, leaf petioles, and buds of various plants.

Life Cycle

Eggs are laid in the ground; the grubs feed on the roots of the same plants.

Reproduction

Eggs are laid in the soil, from which the larvae emerge and develop.

Ecosystem Role

Plays a role in the plant community dynamics by feeding on plant growth and potentially affecting plant health.

Evolution

Originally placed in Curculionidae, long-term agreement among coleopterists has reclassified it into the subfamily Ithycerinae of the family Brentidae, reflecting its distinct characteristics.

Misconceptions

Has been confused with true weevils due to its appearance, but lacks key features such as geniculate antennae.

Tags

• weevil
• Ithycerus
• Ithycerinae
• Brentidae
• Coleoptera