A new substitute name for Bidessus (Bidessodes) plicatus Zimmermann, 1921 (Coleoptera: Dytiscidae: Hydroporinae: Bidessini) Author Hájek, Ji Ř Í text Zootaxa 2012 3326 67 68 journal article 10.5281/zenodo.212094 d1db9dca-ed6e-4524-9657-eba883075115 1175-5326 212094 Bidessodes ( Bidessodes ) zimmermanni nom. nov. Bidessus ( Bidessodes ) plicatus Zimmermann, 1921 : 198 (original description; type locality: Brazil , Mato Grosso, Corumba [ca. 19.01S 57.64W ]). Bidessus plicatus Zimmermann ; Blackwelder 1944 : 76 (catalogue). Bidessodes plicatus (Zimmermann) ; Young 1969 : 2 (new combination; catalogue). Bidessodes (s. str.) plicatus (Zimmermann) ; Young 1986 : 218 (redescription, designation of lectotype ); Braga & Ferreira 2009 : 48 (key). Bidessodes ( Bidessodes ) plicatus (Zimmermann) ; Nilsson 2001 : 112 (catalogue). Comments. Zimmermann (1921) introduced the new species in the combination ‘ Bidessodes plicatus nov. spec.’ However, on the previous page, the author stated ‘ Bidessus subg. Bidessodes ’ and thus clearly gave subgeneric status to Bidessodes Régimbart, 1900 . Therefore the correct original combination is ‘ Bidessus ( Bidessodes ) plicatus ’. The fact was overlooked by the subsequent revising author ( Young 1969 , 1986 ) and was corrected only in the World catalogue ( Nilsson 2001 ). Following ICZN (1999: Article 53.3) , Bidessus plicatus Zimmermann, 1921 is a junior primary homonym of Bidessus plicatus Sharp, 1882 , and is therefore permanently invalid and has to be substituted ( ICZN 1999: Article 60.1 ). Because the taxon has no available synonym, a new substitute name Bidessodes zimmermanni nom. nov. is here proposed ( ICZN 1999: Article 60.3 ). The fact that the junior homonym was described in the subgenus Bidessodes has no effect on the homonymy ( ICZN 1999: Article 57.4 ). A similar situation has already been solved by Hendrich & Wang (2006) for the Australian Bidessus bifasciatus Zimmermann, 1922 , preoccupied by the Neotropical Bidessus ( Hemibidessus ) bifasciatus Zimmermann, 1921 .