Rhinostomus barbirostris

Rhinostomus barbirostris
	Museum specimen of Rhinostomus barbirostris
Scientific classification
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	Insecta
Order:	Coleoptera
Family:	Curculionidae
Subfamily:	Dryophthorinae
Genus:	Rhinostomus
Species:	R. barbirostris
Binomial name
	Rhinostomus barbirostris; (Fabricius, 1775)
Synonyms
	Curculio barbirostris Fabricius, 1775; Rhina barbirostris (Fabricius, 1775); Rhina barbicornis Latreille, 1802 (lapsus for barbirostris Fabricius); Rhina verrirostris Illiger, 1806; Rhina affaber Fahraeus, 1838; Rhina costalis Fahraeus, 1838; Rhina ebriosa Fahraeus, 1838;

Rhinostomus barbirostris, common name Bottlebrush Weevil or Bearded Weevil, is a species of true weevil family.

Description

Rhinostomus barbirostris can reach a length of 11–40 millimetres (0.43–1.57 in), excluding beak. It is probably the third largest weevil in the world. The basic color is black. The pronotum is as long as wide and densely punctate. The elytra bear distinct striae and are deeply punctate. Males have characteristic long reddish gold hairs on the apical portion of the long, straight, and dorsally dentate rostrum. The antennae are long and slender, and strongly elbowed. The front tibiae have two or more large, sharp teeth on the inner face. This species shows an unusual sexual polymorphism, as some males in each population are smaller than other males and resemble females.

Distribution

This common and widespread species occurs mainly in Central America and South America, while similar species in the genus occur in the United States, Africa, Madagascar, Borneo, and India.

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References

Gwannon
Patricia Vaurie Weevils of the Tribe Sipalini (Coleoptera, Curculionidae, Rhynchophorinae) Part 1. The Genera Rhinostomus and Yuccaborus
Key to species of Rhinostomus
The smaller majority
Morrone, J.J., Cuevas, P.I. (2002) Cladistics of the pantropical genus Rhinostomus (Coleoptera: Curculionoidea: Dryophthoridae) with nomenclatural notes

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