Lectotypes are designated for Isonychia ferruginea Alb., 1878 and Ametropus fragilis Alb., 1878, whereas the holotype of Centroptilum tenellum Alb., 1878 is recognized. Specimens from Poland, that were regarded to belong to the Asian Ametropus eatoni Brod., 1930, appear to belong to A. fragilis.

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Zoologische Mededelingen

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Naturalis journals & series

Mol, A. W. M. (1984). Notes on type-specimens of Ephemeroptera (Insecta), described by Herman Albarda, with special reference to Ametropus Fragilis Alb. Zoologische Mededelingen, 59(5), 55–59.