Abstract
Baetis rhodani (Pictet, 1843) is a widespread species that occurs throughout the West Palaearctic. Recently, several sibling species of the subgenus Rhodobaetis have been described and compared to B. rhodani, clearly prompting the need to reassess the taxonomic concept of B. rhodani. The type material of B. rhodani is unfortunately lost or has been destroyed. In order to provide a necessary standard for comparison, a neotype for B. rhodani is designated based on material collected from the best approximation of the type locality (Geneva, Switzerland). The species is also redescribed at both larval and imaginal stages including the set of characters generally used for species identification within the subgenus Rhodobaetis.
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