Arnaudius is a genus of beetles of the family Lucanidae.
Species Arnaudius bomansi Grossi & Bartolozzi, 2011 Arnaudius digennaroi (Arnaud, Noguchi & Bomans, 2008) Arnaudius koikei (Arnaud, Noguchi & Bomans, 2007) Arnaudius monnei Soares & Grossi, 2026
Taxonomy Grossi & Bartolozzi described the Peruvian stag beetle genus Arnaudius in 2011, proposing new combinations for three species that were previously classified within Sclerostomus and Metadorcinus. These species share similarities in the combination of morphological characters, with the shape of the male genital capsule being the most important character diagnosing the genus.
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