Nomenclatural notes on some Palaearctic Gyrinidae (Coleoptera) Author Fery, Hans Räuschstrasse 73, D- 13509 Berlin, Germany; e-mail: hanfry @ aol. com Author Hájek, Jiří Department of Entomology, National Museum, Cirkusová 1740, CZ- 193 00 Praha 9 - Horní Počernice, Czech Republic; e-mail: jiri _ hajek @ nm. cz text Acta Entomologica Musei Nationalis Pragae 2016 2016-11-15 56 2 645 663 journal article 10.5281/zenodo.10273325 0374-1036 10273325 2C0E3A0A-8398-4BC3-BEBC-EA714FDC9F3DR Gyrinus violaaquatica Modeer, 1780 The taxon was originally published as ‘ Gyrinus Viola aquatica ’. MODEER (1780: 160) adapted this name from ALDROVANDI (1602: 706) . One might argue that this name does not agree with Article 5 (‘Principle of Binominal Nomenclature’) of the ICZN (1999) , and thus would be an unavailable name. However, ‘ Viola aquatica ’ is the name of a plant (‘water violet’, currently named Hottonia palustris Linnaeus, 1753 ), and thus ‘a compound species-group name published as separate words that are deemed to form a single word’ (Article 32.5.2.2 of the ICZN 1999 ; see also Article 11.9.5), which makes it an available name. The species was mentioned as ‘ aquatica ’ in the ‘ PalCat ’. Without any exception G. violaaquatica was always considered a junior subjective synonym of Orectochilus villosus (O. F. Müller, 1776 ) .