March 2026: Since the original publication of this tool, two new species of Clavidesmus were described (Audureau 2012Audureau 2012:
Audureau A. 2012. Notes sur les Onciderini du Pérou (Coleoptera, Cerambycidae, Lamiinae, Onciderini). Les Cahiers Magellanes, NS. 9:61–68., Nearns and Santos-Silva 2016Nearns and Santos-Silva 2016:
Nearns EH, Santos-Silva A. 2016. Two new species of Onciderini Thomson, 1860 (Coleoptera, Cerambycidae, Lamiinae) from South America Zootaxa. 4137(3):445–450.); C. lichenigerus (Lane, 1958) was synonymized with C. metallicus (Thomson, 1868Thomson, 1868:
Thomson J. 1868. Révision du groupe des oncidérites (Lamites, cérambycides, coléoptères). Physis Recueil d'Histoire Naturelle. 2(5):41–92.) 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.; C. 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. and C. 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. were transferred to Lachaerus Thomson, 1868Thomson, 1868:
Thomson J. 1868. Révision du groupe des oncidérites (Lamites, cérambycides, coléoptères). Physis Recueil d'Histoire Naturelle. 2(5):41–92. 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 incorporated in "Included Species", but other sections of this fact sheet have not been edited to account for the current species composition.
Elongate-oblong, robust, moderate-sized, ranging from about 14–20 mm in length. Integument generally dark brown or ferrugineous with whitish, ochraceous, ferrugineous, or reddish pubescence. Head with frons subquadrate to transverse, about as wide as width of five lower eye lobes. Eyes with lower lobes small, ovate. Genae elongate, distinctly taller than lower eye lobes. Antennal tubercles prominent, moderately to narrowly separated; tubercles not armed at apex (some females) or with a small projection or short, blunt horn (males). Antennal length variable, from shorter than overall body length to as much as 1 1/3 times as long; scape clavate, longer than antennomere IV; antennomere III shape sexually dimorphic, from strongly clavate (females) to strongly elliptical (males), longer than scape and antennomere IV; antennomere XI longer than X (males). Pronotum transverse, roughly cylindrical, with or without small, lateral tubercles. Elytra with sides roughly parallel to distinctly expanding to apex; elytral apices individually rounded; elytra coloration variable, from vaguely speckled to distinctly maculate; base of elytra without prominent tubercles at humeri. Basal 1/3 of elytra with sparse to dense punctation, surface finely to coarsely punctate. Procoxae simple, without projection. Mesosternal process with apex subtruncate or feebly emarginate. Metafemora moderate to distinctly short in length, about 1/3–1/5 as long as elytra.
The combination of the following characters will help to distinguish this genus: distinctly small eyes, widely separated; scape with apex strongly clavate or elliptical; roughly cylindrical pronotum; and elytra with sides roughly parallel to distinctly expanding to apex.
Strongly resembles Lachaerus and Strioderes.
South America (Argentina, Bolivia, Brazil, Colombia, Ecuador, French Guiana, Paraguay, Peru)
Unknown
Unknown
The genus Clavidesmus currently contains eight species: C. chicae 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.; C. columbianus Breuning, 1961; C. egeri Nearns and Santos-Silva, 2016Nearns and Santos-Silva, 2016:
Nearns EH, Santos-Silva A. 2016. Two new species of Onciderini Thomson, 1860 (Coleoptera, Cerambycidae, Lamiinae) from South America Zootaxa. 4137(3):445–450.; C. funerarius (Lane, 1958); C. heterocerus (Buquet, 1852); C. indistinctus Dillon and Dillon, 1952Dillon and Dillon, 1952:
Dillon LS, Dillon ES. 1952. The tribe Onciderini. Supplementary notes. Annals of the Entomological Society of America. 45(1):59–79.; C. metallicus (Thomson, 1868Thomson, 1868:
Thomson J. 1868. Révision du groupe des oncidérites (Lamites, cérambycides, coléoptères). Physis Recueil d'Histoire Naturelle. 2(5):41–92.); C. rogueti Audureau, 2012Audureau, 2012:
Audureau A. 2012. Notes sur les Onciderini du Pérou (Coleoptera, Cerambycidae, Lamiinae, Onciderini). Les Cahiers Magellanes, NS. 9:61–68..
More species images are available in the Gallery.
Clavidesmus Dillon and Dillon, 1945Dillon 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.
subtribe: Onciderina
type species: Eudesmus heterocerus Buquet, 1852
generic synonymies: Orteguaza Lane, 1958
Audureau (2012)Audureau (2012):
Audureau A. 2012. Notes sur les Onciderini du Pérou (Coleoptera, Cerambycidae, Lamiinae, Onciderini). Les Cahiers Magellanes, NS. 9:61–68., 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., Breuning (1961b)Breuning (1961b):
Breuning S. 1961b. Neue Lamiidae aus dem Museum G. Frey. Entomologische Arbeiten aus dem Museum G Frey Tutzing Bei Muenchen. 12:326–342., Dillon and Dillon (1946)Dillon and Dillon (1946):
Dillon LS, Dillon ES. 1946. The tribe Onciderini (Coleoptera: Cerambycidae) Part II. Reading, Scientific Publications, Reading Public Museum and Art Gallery, Number 6. 189–413 pp., Dillon and Dillon (1949)Dillon and Dillon (1949):
Dillon LS, Dillon ES. 1949. Miscellaneous synonymy and new species among the Lamiinae (Cerambycidae). American Museum Novitates. 1388:1–13., Dillon and Dillon (1952)Dillon and Dillon (1952):
Dillon LS, Dillon ES. 1952. The tribe Onciderini. Supplementary notes. Annals of the Entomological Society of America. 45(1):59–79., Di Iorio (2005)Di Iorio (2005):
Di Iorio OR. 2005. A field guide of longhorned beetles from Argentina (Coleoptera: Cerambycidae). Buenos Aires, Digital Tech. 188 pp., Giorgi (1998)Giorgi (1998):
Giorgi JA. 1998. Duas novas especies de Clavidesmus Dillon & Dillon, 1946 (Coleoptera, Cerambycidae, Lamiinae, Onciderini). Boletim do Museu Nacional. 394:1–4., 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., Nearns and Santos-Silva (2016)Nearns and Santos-Silva (2016):
Nearns EH, Santos-Silva A. 2016. Two new species of Onciderini Thomson, 1860 (Coleoptera, Cerambycidae, Lamiinae) from South America Zootaxa. 4137(3):445–450., Thomson (1868)Thomson (1868):
Thomson J. 1868. Révision du groupe des oncidérites (Lamites, cérambycides, coléoptères). Physis Recueil d'Histoire Naturelle. 2(5):41–92.
