Reference
Marek Linsky, Zuzana Ciamporova-Zatovicova, Fedor Ciampor jr. (2021): A revision of Onychelmis Hinton, 1941 (Coleoptera: Elmidae), with description of new species, DNA barcoding and notes on the geography of the genus – European Journal of Taxonomy – 0739: 1 - 35.