Bulletin ofZoological Nomenclature 62(3) September2005 181 OPINION 2132 (Case 3270) isoMETRiNAE Clark, 1917 (Echinodermata, Crinoidea): spelling emended to isometrainae to remove homonymy with isometrinae Kraepelin, 1891 (Arachnida, Scorpiones) Abstract. The Commission has ruled that the homonymy between the crinoid subfamily name isometrinae Clark, 1917 (type genus Isometra Clark, 1908; family antedonidae) and the scorpion subfamily name isometrinae Kraepelin, 1891 (type genus Isometnis Ehrenberg in Hemprich & Ehrenberg, 1828; family buthidae) is removed. The entire generic name Isometra has been adopted as the stem and the correct spelling ofthe crinoid subfamily is isometrainae Clark, 1917. Keywords. Nomenclature; taxonomy; Crinoidea; Scorpiones; antedonidae; buthi- dae; isometrainae; isometrinae; Isometra\ Isometnis; crinoids; scorpions. Ruling (1) Under the plenary power it is hereby ruled that for the purposes of Article 29 of the Code the stem of the generic name Isometra Clark, 1908 is isometra-. (2) The following names are hereby placed on the Official List ofGeneric Names in Zoology: (a) Isometnis Ehrenberg in Hemprich & Ehrenberg, 1828 (gender: masculine), type species by monotypy Buthiis {Isometrus)filum Ehrenbergin Hemprich & Ehrenberg, 1828 (Scorpiones); (b) Isometra Clark, 1908 (gender: feminine), type species by original designa- tion Antedon challengeri Clark, 1907 (Crinoidea). (3) The following names are hereby placed on the Official List ofSpecific Names in Zoology: (a) maculatus DeGeer, 1778, as pubhshed in the binomen Scorpio maciilatus (senior synonym of Buthiis (Isometnis) filum Ehrenberg in Hemprich & Ehrenberg, 1828, the specific name of the type species of Isometrus Ehrenberg in Hemprich & Ehrenberg, 1828) (Scorpiones); (b) challengeri Clark, 1907, as published in the binomen Antedon chal- lengeri (specific name of the type species of Isometra Clark, 1908) (Crinoidea). (4) The following names are hereby placed on the Official List of Family-Group Names in Zoology: (a) isometrinae Kraepelin, 1891, type genus Isometrus Ehrenbergin Hemprich & Ehrenberg, 1828 (Scorpiones); (b) isometrainae Clark, 1917, type genus Isometra Clark, 1908 (spelling emended by the ruling in (1) above) (Crinoidea). (5) The name isometrinae Clark, 1917 (an incorrect original spelling of iso- metrainae, as ruled in (1) above) is hereby placed on the Official Index of Rejected and Invalid Family-Group Names in Zoology (Crinoidea). 182 Bulletin ofZoological Nomenclature 62(3) September 2005 History of Case 3270 An application to remove the homonymy between the crinoid subfamily name isoMETRiNAE Clark, 1917 (type genus Isometra Clark, 1908; family antedonidae) and the scorpion subfamily name isometrinae Kraepelin, 1891 (type genus Isometrus Ehrenberg in Hemprich & Ehrenberg, 1828; family buthidae) by adopting the entire generic name of Isometra as the stem, so that the correct spelling of the crinoid subfamily will become isometrainae Clark, 1917 was received from Victor Fet {Marshall University, Huntington, West Virginia25755, U.S.A.) and Charles Messing (Oceanographic Center, Nova Southeastern University, Dania Beach, Florida 33004, U.S.A.) on6 February2003. Aftercorrespondencethecasewaspublished in BZN60: 293-296 (December 2003). The title, abstract and keywords of the case were published on the Commission's website. No comments on this case were received. Decision ofthe Commission On 1 March 2005 the members of the Commission were invited to vote on the proposals published in BZN 60: 294—295. At the close ofthe voting period on 1 June 2005 the votes were as follows: — Affirmative votes 18: Alonso-Zarazaga, Bock, Bouchet, Brothers, Calder, Fortey, Halliday, Lamas, Macpherson, Mahnert, Mawatari, Minelli, Nielsen, Papp, Patterson, Rosenberg, Stys and van Tol. — Negative votes none. No votes were received frorn Bohme, Kerzhner, Ng and Song. Original references ThefollowingaretheoriginalreferencestothenamesplacedonOfficial ListsandanOfficial Index by the ruling given in the present Opinion: cluillengeri, Antedon. Clark, 1907, Smithsonian Miscellaneous Collections, 50(3): 353. Isometra Clark, 1908, Proceedings ofthe Biological Society of Washington. 2L 133. isometrainae Clark, 1917, Journalofthe Washington Academy ofSciences, 7(5): 6. ISOMETRINAE Clark, 1917, Journalofthe Washington Academy ofSciences, 7(5): 6. isometrinae Kraepelin, 1891, Jahrbuch der Hamburgischen Wissenschaftlichen Anstalten, 8: 6. Isometrus Ehrenberg in Hemprich & Ehrenberg, 1828, Zoologica II, Arachnoidea. PI. I: Buthus; pi. II: Androctomis in: Symbolae physicae seu icones et descriptiones animalium evertebratorum sepositis insectis quae.e.\ itinereper African! borealem et Asiam occiden- talem, pi. 1, fig. 3. maculatus, Scorpio, DeGeer. 1778, MemoirespourserviraI'lnstoiredesinsectes,Tom. 7,p. 346.