Martinsellus
{{short description|Genus of beetles}}
{{Italic title}}
{{Taxobox
| name = Martinsellus signatus
| image = Martinsellus signatus.jpg
| image_caption = Martinsellus signatus from Rincón de Santa Lucía - Uruguay
| regnum = Animalia
| phylum = Arthropoda
| classis = Insecta
| ordo = Coleoptera
| subordo = Polyphaga
| familia = Cerambycidae
| genus = Martinsellus
| species = M. signatus
| binomial = Martinsellus signatus
| binomial_authority = (Gyllenhal in Schoenherr, 1817)
}}
Martinsellus signatus is a species of beetle in the family Cerambycidae, the only species in the genus Martinsellus.Bezark, Larry G. [http://plant.cdfa.ca.gov/byciddb/bycidview.asp A Photographic Catalog of the Cerambycidae of the World] {{Webarchive|url=https://web.archive.org/web/20130827211041/http://plant.cdfa.ca.gov/byciddb/bycidview.asp |date=2013-08-27 }}. Retrieved on 22 May 2012.