Bulletin of Zoological Nomenclature 46(3) September 1989 193 OPINION 1549 EUGLENIDAE Stein, 1878 (Protista, Flagellata) and EUGLENIDAE Seidlitz, 1875 (Insecta, Coleoptera): homonymy removed, and ADERIDAE Winkler, 1927 (Insecta, Coleoptera): given precedence over EUGLENESIDAE Seidlitz, 1875 Ruling (1) Under the plenary powers it is hereby ruled that: (a) for the purposes of Article 29 of the Code the stem of the generic name Euglenes Westwood, 1 830 is euglenes-; (b) the family-group name aderidae Winkler, 1927 is to be given precedence over the family-group name euglenesidae Seidlitz, 1875 whenever the two names are considered to be synonyms. (2) The following names are hereby placed on the Official List of Generic Names in Zoology: (a) Aderus Stephens, 1829 (gender: mascuhne), type species by designation by Westwood (1830) Lytta boleti Marsham, 1802; (b) Euglena Ehrenberg, 1830 (gender: feminine), type species by designation by Dujardin (1841) Cercaria viridis Muller, 1786; (c) Euglenes Westwood, 1830 (gender: masculine), type species by designation by Pic (1900) Anthicus oculatus Paykull, 1798. (3) The following names are hereby placed on the Official List of Specific Names in Zoology: (a) boleti Marsham, 1 802, as published in the binomen Lytta boleti (specific name of the type species o^ Aderus Stephens, 1829); (b) \iridis Muller, 1 786, as published in the binomen Cercaria viridis (specific name of the type species of Euglena Ehrenberg, 1830); (c) oculatus Paykull, 1798, as published in the binomen Anthicus oculatus (specific name of the type species of Euglenes Westwood, 1830). (4) The following names are hereby placed on the Official List of Family-Group Names in Zoology: (a) aderidae Winkler, 1927, type genus Aderus Stephens, 1829, with the endorse-ment that it is to be given precedence over euglenesidae Seidlitz, 1875 whenever the two names are considered to be synonyms; (b) EUGLENIDAE Stein, 1878, type genus ^M^/e«a Ehrenberg, 1830; (c) EUGLENESIDAE Seidlitz, 1875 (emendation of euglenidae), type genus Euglenes Westwood, 1830, with the endorsement that it is not to be given priority over aderidae Winkler, 1 927 whenever the two names are considered to be synonyms. (5) The name euglenidae Seidlitz, 1875 (emended to euglenesidae in (l)(a) above) is hereby placed on the Official Index of Rejected and Invalid Family-Group Names in Zoology. History of Case 2510 An application to remove the homonymy between euglenidae Stein, 1878 (Protista) and euglenidae Seidlitz, 1 875 (Insecta, Coleoptera), together with the conservation of
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