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Flickr - Lukjonis - Beetle - Byctiscus betulae (1).jpg
Byctiscus betulae
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Coleoptera
Superfamily: Curculionoidea
Family: Rhynchitidae (disputed)
Byctiscus populi in copula and leaf-rolling

The tooth-nosed snout weevils, Rhynchitidae, are small beetles (1.5 to 6.5 mm) that are usually found on low vegetation. The tooth-nosed snout weevils receive this name due to the teeth on the edges of their mandibles.

Traditionally considered a full family within the Curculionoidea (weevils and relatives), the tooth-nosed snout weevils may actually be merely a specialized offshoot of the leaf-rolling weevils (family Attelabidae). Some authorities have thus included them therein as subfamily Rhynchitinae.

A common member of this group is the rose curculio, Merhynchites bicolor, which feeds on roses.

A number of species from Rhynchitidae are recorded from Britain.

The thief weevil, Pterocolus ovatus, is the only pterocoline (subfamily Pterocolinae) known from North America. It is an obligate egg predator and nidus kleptoparasite (nest thief) of some beetles in the family Attelabidae.


  • Triplehorn CA, Johnson NF. 2005. Borror and Delong's Introduction to the Study of Insects. 7th Edition. ISBN 0-03-096835-6
  • Hall DW, Buss LJ. (2007). Thief weevil, Pterocolus ovatus Fabricius. Featured Creatures. EENY-420.

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