March 2026: Since the original publication of this tool, two species were transferred from Clavidesmus to Lachaerus by Giorgi and Monné (2018)Giorgi and Monné (2018):
Giorgi JA, Monné M. 2018. Revisão dos gêneros Lachaerus e Clavidesmus (Coleoptera, Cerambycidae, Lamiinae, Onciderini). Iheringia (Série Zoologia). 108 (e2018044):1-12.. These taxonomic changes are reflected in "Included Species". Other sections in this fact sheet have not been edited to account for these species.
Elongate-oblong, small to moderate-sized, ranging from about 8–17 mm in length. Integument generally dark brown with whitish, ferrugineous, and ochraceous pubescence. Head with frons distinctly transverse, about as wide as width of five lower eye lobes. Eyes with lower lobes ovate. Genae elongate, distinctly taller than lower eye lobes. Antennal tubercles prominent, widely separated; tubercles not armed at apex or armed with a small projection, or with a short, blunt horn. Antennae distinctly shorter than overall body length, from about 2/3–3/4 as long; scape clavate, longer than antennomere IV; antennomere III shape sexually dimorphic, from clavate (females) or strongly elliptical (males), about as long or longer than scape and about as long or longer than antennomere IV. Pronotum transverse, roughly cylindrical, with lateral tubercles; pronotal disk with large glabrous area at center. Elytra with sides roughly parallel to slightly expanding to apices; elytral apices individually rounded; basal 2/3 of elytra whitish with apical third darker; base of elytra without prominent tubercles at humeri. Basal 1/3 of elytra with sparse to moderate punctation, surface finely punctate. Procoxae without projection. Mesosternal process with apex subtruncate or feebly emarginate. Metafemora moderate to short in length, about 1/3–1/4 as long as elytra.
The combination of the following characters will help to distinguish this genus: small eyes, widely separated; frons distinctly transverse; clavate or strongly elliptical antennomere III; center of pronotal disk with large glabrous area; and elytra with sides roughly parallel to slightly expanding to apices.
Strongly resembles Clavidesmus, Cydros, and Strioderes.
South America (Brazil)
Unknown
Unknown
The genus Lachaerus contains three species: L. fascinus (Audinet-Serville, 1835Audinet-Serville, 1835:
Audinet-Serville JG. 1835. Nouvelle classification de la famille des longicornes (suite et fin). Annales de la Société Entomologique de France. 4(1):5–100.); L. monnei (Giorgi, 1998Giorgi, 1998:
Giorgi JA. 1998. Duas novas especies de Clavidesmus Dillon & Dillon, 1946 (Coleoptera, Cerambycidae, Lamiinae, Onciderini). Boletim do Museu Nacional. 394:1–4.); L. rubigineus (Dillon and Dillon, 1949Dillon and Dillon, 1949:
Dillon LS, Dillon ES. 1949. Miscellaneous synonymy and new species among the Lamiinae (Cerambycidae). American Museum Novitates. 1388:1–13.).
More species images are available in the Gallery.
Lachaerus Thomson, 1868Thomson, 1868:
Thomson J. 1868. Révision du groupe des oncidérites (Lamites, cérambycides, coléoptères). Physis Recueil d'Histoire Naturelle. 2(5):41–92.
subtribe: Onciderina
type species: Eudesmus seminivorus Buquet, 1852 [synonym of Eudesmus fascinus Audinet-Serville, 1835Audinet-Serville, 1835:
Audinet-Serville JG. 1835. Nouvelle classification de la famille des longicornes (suite et fin). Annales de la Société Entomologique de France. 4(1):5–100. ]
Audinet-Serville (1835)Audinet-Serville (1835):
Audinet-Serville JG. 1835. Nouvelle classification de la famille des longicornes (suite et fin). Annales de la Société Entomologique de France. 4(1):5–100., Bezark and Monné (2013)Bezark and Monné (2013):
Bezark LG, Monné MA. 2013. Checklist of the Oxypeltidae, Vesperidae, Disteniidae and Cerambycidae, (Coleoptera) of the Western Hemisphere., Dillon and Dillon (1945)Dillon and Dillon (1945):
Dillon LS, Dillon ES. 1945. The tribe Onciderini (Coleoptera: Cerambycidae) Part I. Reading, Scientific Publications, Reading Public Museum and Art Gallery, Number 5. 186 pp., Giorgi and Monné (2018)Giorgi and Monné (2018):
Giorgi JA, Monné M. 2018. Revisão dos gêneros Lachaerus e Clavidesmus (Coleoptera, Cerambycidae, Lamiinae, Onciderini). Iheringia (Série Zoologia). 108 (e2018044):1-12., Monné (2005)Monné (2005):
Monné MA. 2005. Catalogue of the Cerambycidae (Coleoptera) of the Neotropical Region. Part II. Subfamily Lamiinae. Zootaxa. 1023:1–759., Thomson (1868)Thomson (1868):
Thomson J. 1868. Révision du groupe des oncidérites (Lamites, cérambycides, coléoptères). Physis Recueil d'Histoire Naturelle. 2(5):41–92.
