Brachyomus

Brachyomus
Head of Brachyomus octotuberculatus
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	Insecta
Order:	Coleoptera
Suborder:	Polyphaga
Infraorder:	Cucujiformia
Family:	Curculionidae
Subfamily:	Entiminae
Tribe:	Eustylini
Genus:	Brachyomus Lacordaire, 1863

Brachyomus is a Neotropical genus of broad-nosed weevils in the subfamily Entiminae, tribe Eustylini.[1]

Taxonomy

Brachyomus was described for the first time by Jean-Baptiste Henri Lacordaire in 1863 (p. 130).[2]

Description

Members of the genus Brachyomus are easily confused with members of the genus Compsus. Members of Brachyomus lack elytral shoulders and usually bear tubercles (four or more; there are only two in Compsus when they have them) on the broadest part of the elytra. They are usually covered by brown to whitish scales, forming some patterning; they can also bear metallic green or blue scales; some species have waxy secretions at the base of the elytral tubercles. There are thick scales rather uniform;y distributed all over the surface of the body, sometimes more densely so on the elytral tubercles. There is a key to identify most species in Faust (1892).[3]

Distribution

The genus Brachyomus is distributed in Colombia, Ecuador, French Guiana, Peru, Trinidad, Venezuela and Saint Vincent[1][4][5]

List of species

Brachyomus contains 7 described species:[4][5]

1. Brachyomus bicostatus Faust, 1892: 14:[3] Venezuela.
2. Brachyomus histrio Faust, 1892: 14:[3] Venezuela.
3. Brachyomus metallescens Pascoe, 1880: 427:[6] Ecuador, Peru.
4. Brachyomus octotuberculatus (Fabricius), 1787: 112:[7] French Guiana, Trinidad, Venezuela.
5. Brachyomus quadrinodosus (Boheman), 1842: 217 [8] = Brachyomus sallei Faust, 1892: 15:[3] Colombia, Venezuela.
6. Brachyomus quadrituberculatus (Boheman), 1842: 216:[8] Colombia, Venezuela.
7. Brachyomus tuberculatus (Boheman), 1842: 218:[8] Saint Vincent.

References

1. Alonso-Zarazaga, M. A.; Lyal, C. H. C. (1999). A world catalogue of families and genera of Curculionoidea (Insecta: Coleoptera) excluding Scolytidae and Platypodidae (PDF). Barcelona, Spain: Entomopraxis. pp. 315 pp.
2. Lacordaire, J.T. (1863). Histoire naturelle des insectes: Genera des Coléoptères ou exposé méthodique et critique de tous les genres proposés jusqu’ici dans cet ordre d’insectes. Tome Sexième. Contenant la famille des Curculionides. Paris: Librairie encyclopédique de Roret. pp. 637 pp.
3. Faust, Johannes (1892). "Reise von E. Simon in Venezuela. Curculionidae. Pars prima". Entomologische Zeitung. 53: 1–44.
4. Wibmer, G. J.; O'Brien, C. W. (1986). "Annotated checklist of the weevils (Curculionidae sensu lato) of South America (Coleoptera: Curculionoidea)". Memoirs of the American Entomological Institute. 39: 1–563.
5. O’Brien, C.W.; Wibmer, G.J. (1982). "Annotated checklist of the weevils (Curculionidae sensu lato) of North America, Central America, and the West Indies (Coleoptera: Curculionoidea)". Memoirs of the American Entomological Institute. 34: 1–382.
6. Pascoe, F.P. (1880). "New Neotropical Curculionidae. Part I". The Annals and Magazine of Natural History. 5: 419–428.
7. Fabricius, Johann Christian (1787). Mantissa insectorum sistens eorum species nuper detectas adiectis characteribus genericis, differentiis specifis, emendationubus, observationibus (in Latin). Hafniae: Proft. pp. XX + 348 pp.
8. Schönherr, C.J. (1842). Genera et species Curculionidum, cum synonymia hujus familiae. Species novae aut hactenus minus cognitae, descriptionibus a Dom. Leonardo Gyllenhal, C. H. Boheman, et entomologis aliis illustratae, tomus sextus, pars secunda. Paris: Roret. pp. 495 pp.