{{Short description|Species of beetle}} {{Speciesbox | image = | image_caption = | image2 = | image2_caption = | genus= Alurnus | species = orbignyi | authority = Guérin-Méneville, 1840 | synonyms = *''Alurnus d'orbignyi'' <small>Guérin-Méneville, 1840</small> *''Alurnus orbignyi balyi'' <small>Jacobson, 1899</small> *''Alurnus saundersii'' <small>Baly, 1858</small> *''Alurnus iheringi'' <small>Weise, 1910</small> }} '''''Alurnus orbignyi''''' is a species of beetle of the family Chrysomelidae. It is found in Argentina, Bolivia, Brazil, Ecuador, Peru and Venezuela.
==Description== Adults reach a length of about 28–37 mm. Adults have a shining black head and legs, while the pronotum is reddish with a black basal spot. The elytron is pale yellow with a black spot.<ref>{{cite journal |last1= Staines|first1= C.L.|last2= |first2= |date= 2013|title= A review of the genus Alurnus Fabricius, 1775 (Coleoptera: Chrysomelidae: Cassidinae).|url= https://journals.flvc.org/mundi/article/view/0291/78783|journal= Insecta Mundi|volume= 0291|issue= |publisher= Center for Systematic Entomology, Inc.|pages= 1–34|doi= |access-date= August 26, 2025}}</ref>
==Biology== They have been recorded feeding on ''Aroides'' species.<ref>{{cite web |last= Staines|first= C.L.|date= 2012|title= Hispines of the World.|url= https://idtools.org/beetles/hispines/|website= |location= |publisher= USDA/APHIS/PPQ Science and Technology and National Natural History Museum.|access-date= August 26, 2025}}</ref>
== References == {{reflist}}
{{Taxonbar|from=Q2186295}} Category:Taxa named by Félix Édouard Guérin-Méneville Category:Beetles described in 1840 Category:Alurnus Category:Beetles of Argentina Category:Beetles of Bolivia Category:Beetles of Brazil Category:Beetles of Ecuador Category:Beetles of Peru Category:Beetles of Venezuela {{Cassidinae-stub}}