International Commission on Zoological Nomenclature

ICZN Opinions & Cases

Declarations

ICZN 1943: Declaration 1 (no Case registration) Code of Ethics to be observed in the renaming of homonyms. Opinions and Declarations rendered by the ICZN, 1A(1): 1-6. BHL

ICZN 1943: Declaration 2 (no Case registration) On the importance of avoiding the issue of authors’ reprints or separata in advance of the publication of the work or journal in which the paper in question is to be published. Opinions and Declarations rendered by the ICZN, 1(2): 7-14. BHL

ICZN 1943: Declaration 3 (no Case registration) On the importance of giving a clear indication of the date of issue of every zoological publication. Opinions and Declarations rendered by the ICZN. 1943, 1(3): 15-22. BHL

ICZN 1943: Declaration 4 (no Case registration) On the need for avoiding intemperate language in discussions on zoological nomenclature. Opinions and Declarations rendered by the ICZN, 1(4): 23-30. BHL

ICZN 1943: Declaration 5 (no Case registration) On the grant to the International Commission on Zoological Nomenclature of plenary powers to suspend the rules in certain cases. Opinions and Declarations rendered by the ICZN, 1(5): 31-40. BHL

ICZN 1943: Declaration 6 (no Case registration) On the need for new names to be clearly indicated as such on their first publication and on the need for avoiding the publication of names as new on more than one occasion. Opinions and Declarations rendered by the ICZN, 1(6): 41-48. BHL

ICZN 1943: Declaration 7 (no Case registration) On the need for quoting bibliographical or other references for all names cited in zoological works. Opinions and Declarations rendered by the ICZN, 1(7): 49-56. BHL

ICZN 1943: Declaration 8 (no Case registration) On the need for giving in the case of zoological journals a clear indication of the date of publication of each number or part. Opinions and Declarations rendered by the ICZN, 1(8): 57-64. BHL

ICZN 1943: Declaration 9 (no Case registration) On the desirability of Universities including zoological nomenclature in their courses of general and systematic zoology. Opinions and Declarations rendered by the ICZN, 1(9): 65-71. BHL

ICZN 1944: Declaration 10 On the importance of forming specialist groups for the study of the nomenclature of particular divisions of the Animal Kingdom. Opinions and Declarations rendered by the ICZN, 2(18): i-viii. BHL

ICZN 1944: Declaration 11 On the need for a clear indication in the description of new genera and species of the Order and Family involved. Opinions and Declarations rendered by the ICZN, 2(19): ix-xvi. BHL

ICZN 1944: Declaration 12 On the question of breaches of the Code of Ethics (Declaration supplementary to Declaration 1). Opinions and Declarations rendered by the ICZN, 2(22): xvii-xxiv. BHL

ICZN 1954: Declaration 13 (Case 528) Rejection of the distribution of a paper in microfilm, or on a microcard or the like, as a method of “publication” for the purposes of Article 25 of the Régles. Opinions and Declarations rendered by the ICZN, 9(7): i-xii. BHL

ICZN 1955: Declaration 14 (Case 539) Clarification of the meaning of Rule (f) in Article 30 of the Régles (Rule relating to the type species of a nominal genus established to replace an earlier nominal genus). Opinions and Declarations rendered by the ICZN, 9(12): xiii-xxiv. BHL

ICZN 1955: Declaration 15 (Case 734) Clarification of the question of the nominal species to be regarded as eligible for selection as the type species of a nominal genus established without cited nominal species, in cases where a subsequent author, without citing such a species, gives a bibliographical reference to a work in which such a species is cited. Opinions and Declarations rendered by the ICZN, 9(18): xxv-xxxvi. BHL

ICZN 1955: Declaration 16 (Case 349) Clarification of the question of the availability of a name having as its only “indication” a qualified synonymic reference to a previously published name. Opinions and Declarations rendered by the ICZN, 9(21): xxxvii-vlviii. BHL

ICZN 1955: Declaration 17 (Case 586) Clarification of the provision in the Régles relating to the conditions necessary to establish a state of secondary homonymy between any two specific names. Opinions and Declarations rendered by the ICZN, 9(22): xlix-lx. BHL

ICZN 1954: Declaration 18 (Case 844) Adoption of Rules relating to the making of entries on the Official List of Family-Group Names in Zoology and on the Official Index of Rejected and Invalid Family-Group Names in Zoology. Opinions and Declarations rendered by the ICZN, 6(15): i-xx. BHL

ICZN 1954: Declaration 19 (Case 845) Adoption of Rules relating to the making of entries on the Official List of Specific Names in Zoology and on the Official Index of Rejected and Invalid Specific Names in Zoology. Opinions and Declarations rendered by the ICZN, 6(16): xxi-xl. BHL

ICZN 1955: Declaration 20 (Case 924) Clarification of the status of a family-group name where the name of the type genus of the taxon so named is suppressed under the Plenary Powers. Opinions and Declarations rendered by the ICZN, 10(19): i-viii. BHL

ICZN 1956: Declaration 21 (Case 908) Clarification of the interpretation of Article 30 of the Régles regarding the specific name to be accepted as the name for the type species of a genus where that species has two or more objectively synonymous such names. Opinions and Declarations rendered by the ICZN, 12(11): i-viii. BHL 

ICZN 1956: Declaration 22 (Case 715) Clarification of Rule (a) in Article 30 in relation to the status thereunder of a designation of a type species for a genus made at the time of the publication of the generic name concerned when that designation or some part is ambiguous or is qualified by a mark of interrogation. Opinions and Declarations rendered by the ICZN, 12(12): ix-xviii. BHL 

ICZN 1956: Declaration 23 (Case 834) Clarification of the status under the Law of Homonymy of each of three pairs of specific names based, in the case of the names comprised in each pair, upon the same geographical term and differing from one another only in spelling. Opinions and Declarations rendered by the ICZN, 13(2): i-xvi. BHL 

ICZN 1956: Declaration 24 (Case 833) Clarification of the status under Article 25 of the Régles of a name for a taxon published conditionally and matters incidental thereto. Opinions and Declarations rendered by the ICZN, 13(18): xvii-xxvi. BHL 

ICZN 1956: Declaration 25 (Case 878) Clarification of Rule (g) in Article 30 in relation to the selection of the type species of a genus in a case where the nominal species so selected, though not itself cited at the time of the establishment of the genus in question, is objectively identical with another nominal species which was so cited. Opinions and Declarations rendered by the ICZN, 13(19): xxvii-xxxvi. BHL 

ICZN 1956: Declaration 26 (Case 904) Clarification of the expression “monotypical genus” for the purposes of Rule (c) in Article 30 of the Régles. Opinions and Declarations rendered by the ICZN, 13(19): xxvii-xxxvi. BHL 

ICZN 1956: Declaration 27 (Case 867) Clarification of the question of the species to be accepted under Rule (f) in Article 30 as the type species of a nominal genus established as a substitute for a previously established such genus but with a designated type species different from that of the nominal genus so replaced. Opinions and Declarations rendered by the ICZN, 14(19): i-x. BHL 

ICZN 1956: Declaration 28 (Case 1038) Clarification of the status of a name given to a family-group taxon based upon a misidentified type genus. Opinions and Declarations rendered by the ICZN, 14(20): xi-xxiv. BHL

ICZN 1956: Declaration 29 (Case 1151) Introduction and definition of the expression “Linnean tautonymy” in relation to the determination of the type species of a nominal genus under Rule (d) in Article 30. Opinions and Declarations rendered by the ICZN, 14(22): xxv-xxxii. BHL

ICZN 1957: Declaration 30 (Case 894) Clarification of the question of the generic name in combination with which a specific name is to be treated as having been published when the species so named was (a) placed in a previously established nominal genus and (b) also referred to a new nominal genus conditionally established. Opinions and Declarations rendered by the ICZN, 15(27): i-xii. BHL

ICZN 1957: Declaration 31 (Case 1148) Clarification of the expression “type genus” in the provisions relating to the publication of family-group names. Opinions and Declarations rendered by the ICZN, 16(10): i-x. BHL

ICZN 1957: Declaration 32 (Case 891) Clarification of the meaning of Article 21 of the Régles in relation to the authorship to be attributed in certain circumstances to zoological names and to any act taken under other provisions of the Régles affecting the status of such names. Opinions and Declarations rendered by the ICZN, 16(11): xi-xxiv. BHL

ICZN 1957: Declaration 33 (Case 929) Clarification of the status under Article 25 of a name for a taxon published in the index of a work in the text of which that taxon was described only under a vernacular name. Opinions and Declarations rendered by the ICZN, 16(14): xxv-xxxviii. BHL

ICZN 1957: Declaration 34 (Case 1208) Clarification of the procedure to be followed by the International Commission on Zoological Nomenclature when at the conclusion of a vote on an application for the use of its Plenary Powers it is found that a majority but not a two-thirds majority of the Members of the Commission voting thereon has voted in favour of the application in question. Opinions and Declarations rendered by the ICZN, 17(2): i-xii. BHL

ICZN 1957: Declaration 35 (Case 1163) Clarification of the meaning of the expression “syntype” as used in the Régles. Opinions and Declarations rendered by the ICZN, 17(4): xiii-xxvi. BHL 

ICZN 1958: Declaration 36 (Case 1206) Determination under Decision 85 of the Fourteenth International Congress of Zoology, Copenhagen, 1953, of the gender to be attributed to generic names having the terminations “-ops” and “-opsis” respectively. Opinions and Declarations rendered by the ICZN, 18(2): i-xii. BHL 

ICZN 1958: Declaration 37 (Case 1141) Clarification of the provisions in the Régles regarding the method to be followed in determining the relative precedence to be accorded to any two names for nominal family-group taxa published in the same work and on the same date. Opinions and Declarations rendered by the ICZN, 18(4): xiii-xxii. BHL

ICZN 1958: Declaration 38 (Case 1273) Clarification of the procedure to be adopted for determining the authorship to be attributed for the purposes of zoological nomenclature to any given work in cases where the accuracy of the authorship stated in the title has been questioned. Opinions and Declarations rendered by the ICZN, 18(13): xxiii-xxx. BHL

ICZN 1958: Declaration 39 (Case 966, Case 1277) Review under Copenhagen Decision 85 of the Rules relating to the gender to be attributed to certain classes of generic name prescribed in the provisional Rules numbered as Rule (7)(b)(i) and Rule (7)(c)(i) respectively in Decision 84 of the Fourteenth International Congress of Zoology, Copenhagen, 1953. Opinions and Declarations rendered by the ICZN, 19(4): i-xviii. BHL

ICZN 1958: Declaration 40 (Case 951) Determination of the gender to be attributed to generic names having the termination “-ides”, “ites” or “-oides”. Opinions and Declarations rendered by the ICZN, 19(14): xix-xxviii. BHL

ICZN 1958: Declaration 41 (Case 1223) Clarification of the status of terms used as zoological names in works written in the Latin language. Opinions and Declarations rendered by the ICZN, 19(15): xxix-xxxviii. BHL

ICZN 1966: Declaration 42 (Case 1667) Abbreviations in compound names: Amendment of Article 26 of the International Code of Zoological Nomenclature. Bulletin of Zoological Nomenclature, 23: 198. BHL

ICZN 1970: Declaration 43 (Case 1543) Repeal of Article 23b. Bulletin of Zoological Nomenclature, 27(3-4): 135-163. BZN

ICZN 2003: Declaration 44 Amendment of Article 74.7.3. Bulletin of Zoological Nomenclature, 60(4): 263. BHL 

ICZN 2017: Declaration 45 Addition of Recommendations to Article 73 and of the term “specimen, preserved” to the Glossary. Bulletin of Zoological Nomenclature, 73(2-4): 96-97. BioOne

ICZN 2023: Declaration 46 Amendment of Article 8 to reaffirm the ineffectiveness of subsequent disclaimers and retractions with respect to published works, available names and nomenclatural acts in zoological nomenclature. Bulletin of Zoological Nomenclature, 80(1): 15-16.