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True weevils and bark beetles
Bantiades rectalis
Scientific classification
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	Insecta
Order:	Coleoptera
Suborder:	Polyphaga
Infraorder:	Cucujiformia
Superfamily:	Curculionoidea
Family:	Curculionidae Latreille, 1802
Diversity
Some 20 subfamilies (but see text)

Dissostomus hornabrooki

A true weevil

The Curculionidae are the family of the "true" weevils (or "snout beetles"). They are one of the largest animal families, with 6,800 genera and 83,000^[1] species described worldwide.

They include the bark beetles as subfamily Scolytinae, which are modified^{[unreliable source?]} in shape in accordance with their wood-boring lifestyle. They do not much resemble other weevils, so they were traditionally considered a distinct family, Scolytidae. The family also includes the ambrosia beetles, of which the present-day subfamily Platypodinae was formerly considered the distinct family Platypodidae.

Description

They are recognized by their distinctive long snouts and geniculate antennae with small clubs; beyond that, curculionids have considerable diversity of form and size, with adult lengths ranging from 1 to 40 mm (0.04 to 1.57 in).

Curculio elephas

Weevils are almost entirely plant feeders, and most species are associated with a narrow range of hosts, in many cases only living on a single species. With so many species to classify and over 400 genera, the taxonomy of this family is quite complicated, and authors disagree on the number and placement of various subfamilies, tribes, and subtribes.

Phylogeny and systematics

The phylogeny of the group is complex; with so many species, a spirited debate exists about the relationships between subfamilies and genera. A 1997 analysis attempted to construct a phylogeny based mainly on larval characteristics.^[2]

Recent work on the phylogenetic relationships in weevils mentions the two subfamily groups Adelognatha (short-nosed weevils, subfamily Entiminae) and Phanerognatha (long-nosed weevils, subfamilies of Curculionidae other than Entiminae) for the species of Curculionidae.^[3]

Almost two dozen subfamilies are recognized by some authors even when merging those that are certainly invalid. Others, however, recognize a lesser number – the only subfamilies that are almost universally considered valid are the Baridinae, Cossoninae, Curculioninae, Cyclominae, Entiminae, Molytinae, Platypodinae, and Scolytinae. The various proposed taxonomic schemes typically recognize as many additional subfamilies again, but little agreement is seen between authorities about which. In particular, the delimitation of the Molytinae has proven difficult.

Bantiades rectalis

The subfamilies considered valid by at least some authors today:

• 
  Bagoinae (sometimes in Molytinae)


• Baridinae


• 
  Brachycerinae (disputed)


• 
  Conoderinae (sometimes in Baridinae)


• Cossoninae


• 
  Cryptorhynchinae (sometimes in Curculioninae)
  
  

  
  Play media
  

  
  

  
  Cionus tuberculosus (Curculioninae)

  
  
  
  
  • Acalles


• 
  Curculioninae – flower weevils, acorn and nut weevils


• Cyclominae


• 
  Dryophthorinae (disputed)


• 
  Entiminae – broad-nosed weevils


• 
  Hyperinae (sometimes in Molytinae)


• 
  Lixinae (sometimes in Molytinae)


• 
  Mesoptiliinae (sometimes in Molytinae)


• Molytinae


• 
  Orobitidinae (sometimes in Baridinae)


• 
  Platypodinae – typical ambrosia beetles
  


• 
  Raymondionyminae (sometimes in Brachycerinae)


• 
  Scolytinae – bark beetles


• 
  Xiphaspidinae (sometimes in Baridinae)

See also

• Black vine weevil


• Boll weevil


• Pecan weevil


• Wheat weevil


• Hylobius


• Scolytoplatypus


• Pests and diseases of roses

References

External links

• 
  Media related to Curculionidae at Wikimedia Commons


• 
  Data related to Curculionidae at Wikispecies


• Images of Curculionidae species found in New Zealand

On the University of Florida / Institute of Food and Agricultural Sciences Featured Creatures website:

• 
  Anthonomus eugenii, pepper weevil


• 
  Cylas formicarius, sweetpotato weevil


• 
  Chalcodermus aeneus, cowpea curculio


• 
  Cosmopolites sordidus, banana root borer


• 
  Eudociminus mannerheimii, cypress weevil


• Eurhinus magnificus


• 
  Gerstaeckeria spp.


• 
  Metamasius callizona, Mexican bromeliad weevil


• 
  Metamasius hemipterus sericeus, silky cane weevil,


• 
  Metamasius mosieri, Florida bromeliad weevil


• 
  Naupactus (=Graphognathus) spp., whitefringed beetles


• 
  Oxyops vitiosa, melaleuca weevil


• 
  Pantomorus cervinus, Fuller rose weevil


• 
  Pseudocneorhinus bifasciatus, twobanded Japanese weevil


• 
  Rhynchophorus cruentatus, palmetto weevil


• 
  Sphenophorus venatus, hunting billbug

Other University web pages on economically important curculids:

• 
  Conotrachelus nenuphar, plum curculio from the Ohio State University


• 
  Orchestes pallicornis, apple flea weevil from Michigan State University