) Bulletin ofZoological Nomenclature 64(2) June 2007 129 OPINION 2170 (Case 3300) Halipegiis occidiialis Stafford, 1905 and Cercaria projecta Willey, 1930 (Digenea, hemiuridae): priority maintained Abstract. The Commission has ruled that priority is maintained for two species of hemiuriddigeneans, Halipegiisoccidiialis Stafford, 1905 and CercariaprojectaWilley, 1930, known to parasitise ranid frogs and various freshwater pulmonate snails. A proposal to conserve the junior homonym Halipegiis occidiialis Krull, 1935 of the former name and the junior synonym Halipegiis eccentriciis Thomas, 1939 of the latter name was not approved. Keywords. Nomenclature; taxonomy; Digenea; hemiuridae; Halipegiis occidiialis; Cercariaprojecta; Halipegiiseccentriciis; Amphibia; ranidae; parasiticworms; North America. Ruling (1 It is hereby ruled that priority is maintained for the names occidiialis Stafford, 1905, as published in the binomen Halipegiis occidiialis, and projecta Willey, 1930, as published in the binomen Cercariaprojecta. (2) The following names are hereby placed on the Official List ofSpecific Names in Zoology: (a) occidualis Stafford, 1905, as published in the binomen Halipegusoccidualis; (b)projecta Willey, 1930, as published in the binomen Cercariaprojecta. History of Case 3300 An application to conserve the specific names oiHalipegiis occidualis Krull, 1935 and Halipegus eccentriciis Thomas, 1939 for two species of hemiurid digeneans known to parasitiseranid frogsand various freshwaterpulmonate snailswas received from D.F. McAlpine (TVeir Brunswick Museum, SaintJohn. New Brunswick. Canada) on 27 August 2003. After correspondence the case was published in BZN 63: 12-16 (March 2006). 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 December 2006 the members ofthe Commission were invited to vote on the proposals published in BZN 63: 14-15. At the close ofthe voting period on 1 March 2007 the votes were as follows: Affirmative votes - 7: Bock, Fautin, Krell, Macpherson, Papp, Song and Zhang. Negative votes - 20: Alonso-Zarazaga, Bogutskaya, Bouchet, Brothers, Grygier, Halliday, Kerzhner, Kottelat, Kullander, Lamas, Lim, Mahnert, Mawatari, Ng, Pape, Patterson, Pyle, Rosenberg, Stys and van Tol. Minelli abstained. Commissionersvotingagainstpointed outthat usage ofthe names involvedwas so limited that to maintain priority would not create significant problems. 130 Bulletin ofZoological Nomenclature 64(2) June 2007 Original references Thefollowingaretheoriginal referencestothenainesplacedon anOfficial Listbytheruling given in the present Opinion: occidiialis, Halipegus, Stafford, 1905, Zoologischer Anzeiger. 28: 687. projecta, Cercaria, Willey, 1930. Parasitology, 22: 481.