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Riolus Mulsant and Rey 1872 (riffle beetle)

Insecta - Coleoptera - Elmidae

PaleoDB taxon number: 311840

Synonym: Normandia Pic 1900 (taxon 319734)

Parent taxon: Elmidae according to M. M. Aalto et al. 1984

Sister taxa: Cleptelmis, Cretohypsilara, Elminae, Heterelmis, Heterlimnius, Larainae, Zaitzevia

Subtaxa: Riolus cupreus, Riolus nitens

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Type: Limnius cupreus

Ecology: