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Opinion 320 Validation, under the Plenary Powers, of the generic name Limulus Müller (O. F.), 1785 (class Merostomata) and confirmation of the entry of that name on the Official List of Generic Names in Zoology (validation of an error in Opinion 104)
Authors: International Commission on Zoological Nomenclature
Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1955, in volume 9, issue 10, pages 147-170
Created: 2015-05-26, modified: 2025-12-17
Opinion 321 Addition to the Official List of Specific Names in Zoology of the specific name striatoradiatus Leske, 1778, as published in the combination Spatangus striato-Radiatus, the oldest available name for the fossil Echinoderm from the Limburg Cretaceous (Maestrichtian) commonly known as the Spatangue de Maestricht (class Echinoidea)
Authors: International Commission on Zoological Nomenclature
Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1955, in volume 9, issue 11, pages 171-184
Created: 2015-05-26, modified: 2025-12-17
Opinion 322 Validation, under the Plenary Powers, of the generic name Fulgora Linnaeus, 1767 (class Insecta, order Hemiptera) and designation for the genus so named of a type species in harmony with current nomenclatorial practice
Authors: International Commission on Zoological Nomenclature
Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1955, in volume 9, issue 13, pages 185-208
Created: 2015-05-26, modified: 2025-12-17
Opinion 323 Validation and interpretation, under the Plenary Powers, of the specific name angulatus Schlotheim, 1820, as published in the combination ammonites Angulatus for the type species of the genus Schlotheimia Bayle, 1878 (class Cephalopoda, order Ammonoidea)
Authors: International Commission on Zoological Nomenclature
Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1955, in volume 9, issue 14, pages 209-226
Created: 2015-05-26, modified: 2025-12-17
Opinion 328 Suppression, under the Plenary Powers, of the specific name caesius Cloquet, 1818, as published in the combination Coluber caesius, for the purpose of validating the specific name Irregularis Leach, 1819, as published in the combination Coluber Irregularis (class Reptiha, order Squamata)
Authors: International Commission on Zoological Nomenclature
Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1955, in volume 9, issue 20, pages 299-308
Created: 2015-05-26, modified: 2025-12-17
Opinion 345 Rejection of a proposal for the use of the Plenary Powers for the benefit of the generic name Rhina Latreille, [1802-1803] (class Insecta, order Coleoptera) and addition of the generic name Rhina Schneider, 1801 (class Elasmobranchii) to the Official List of Generic Names in Zoology; designation under the Plenary Powers for the genera Rhinostomus Rafinesque, 1815, and Magdalis Germar, 1817 (class Insecta, order Coleoptera) of type species in harmony with accustomed usage; validation under the Plenary Powers of the specific name barbicornis Latreille, [1803-1804], as published in the combination Rhina barbicornis (class Insecta, order Coleoptera)
Authors: International Commission on Zoological Nomenclature
Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1955, in volume 10, pages 353-388
Created: 2015-05-22, modified: 2025-12-17
Opinion 338 Acceptance of the Mesozoic fossil species Gryphaea arcuata Lamarck, 1801, as the type species of the nominal genus Gryphaea Lamarck, 1801, and addition of the generic name Gryphaea Lamarck, 1801 (class Pelecypoda) to the Official List of Generic Names in Zoology
Authors: International Commission on Zoological Nomenclature
Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1955, in volume 10, issue 5, pages 125-180
Created: 2015-05-26, modified: 2025-12-17
Opinion 342 Designation, under the Plenary Powers, of type species for the nominal genera Lipeurus Nitzsch, 1818, Colpocephalum Nitzsch, 1818, and Gyropus Nitzsch, 1818 (class Insecta, order Mallophaga) in harmony with current nomenclatorial practice
Authors: International Commission on Zoological Nomenclature
Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1955, in volume 10, issue 9, pages 271-298
Created: 2015-05-26, modified: 2025-12-17
Opinion 344 Validation under the Plenary Powers of the generic name Truncatella Risso, 1826, and addition of that name and the names Acmaea Eschscholtz, 1833, and Acicula Hartmann, 1821 (class Gastropoda) to the Official List of Generic Names in Zoology
Authors: International Commission on Zoological Nomenclature
Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1955, in volume 10, issue 11, pages 313-352
Created: 2015-05-26, modified: 2025-12-17
Direction 14 Addition to the Official List of family- group names in Zoology or, as the case may be, to the Official Index of Rejected and Invalid family-group names in Zoology of the family-group names Involved in the applications relating to the names of ammonites published in volume 2 of the Bulletin of Zoological nomenclature
Authors: International Commission on Zoological Nomenclature
Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1955, in volume 10, issue 18, pages 463-480
Created: 2015-05-25, modified: 2025-12-17
Direction 27 Addition to the Official List of Family-group Names in Zoology of Family-group Names based upon the names of certain genera of non-marine Mollusca placed on the Official List of Generic Names in Zoology by the ruling given in Opinion 335
Authors: International Commission on Zoological Nomenclature
Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1955, in volume 10, issue 20, pages 481-492
Created: 2015-05-25, modified: 2025-12-17
Direction 28 Addition to the Official List of Family-group Names in Zoology or, as the case may be, to the Official Index of Rejected and Invalid family-group names in Zoology of the family-group names Involved in the Cases dealt with in the Opinions included in volume 10 of the Opinions and Declarations rendered by the International Commission on Zoological nomenclature, other than family-group names already dealt with in those Opinions or in Directions included in that volume
Authors: International Commission on Zoological Nomenclature
Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1955, in volume 10, issue 21, pages 493-510
Created: 2015-05-25, modified: 2025-12-17
Opinion 365 Suppression, under the Plenary Powers, of the specific name cinereous le Conte, 1852, as published in the combination Crotalus cinereous, for the purpose of rendering the specific name Atrox Baird & Girard, 1853, as published in the combination Crotalus Atrox, the oldest available name for the Western Diamond Rattle Snake (class Reptilia, order Squamata)
Authors: International Commission on Zoological Nomenclature
Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1955, in volume 11, pages 215-230
Created: 2015-05-26, modified: 2025-12-17
Opinion 356 Addition to the Official List of Family-group Names Zoology of the names of the family-group taxa having Ostrea Linnaeus, 1758, and Gryphaea Lamarck, 1801 (class Pelecypoda) as their respective type genera (Opinion supplementary to Opinion 338)
Authors: International Commission on Zoological Nomenclature
Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1955, in volume 11, issue 6, pages 103-112
Created: 2015-05-26, modified: 2025-12-17
Opinion 357 Designation under the Plenary Powers (a) of a type species in harmony with accustomed usage, for the genus Chortoicetes Brunner von Wattenwyl, 1893, and (B) of the gender to be attributed to the name of that Genus and to the name Austroicetes Uvarov, 1925 (class Insecta, order Orthoptera)
Authors: International Commission on Zoological Nomenclature
Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1955, in volume 11, issue 7, pages 113-128
Created: 2015-05-26, modified: 2025-12-17
Opinion 359 Suppression, under the Plenary Powers, of the generic name Miersia Kingsley, 1879, for the purpose of Render Ing the generic name Acanthephyra Milne Edwards (a,), 1881 (class Crustacea, order Decapoda) the oldest available name for the genus concerned
Authors: International Commission on Zoological Nomenclature
Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1955, in volume 11, issue 9, pages 139-150
Created: 2015-05-26, modified: 2025-12-17
Opinion 364 Addition of the name Ancylastrum Bourguignat, February 1853 (class Gastropoda) to the Official List of Generic Names in Zoology with Ancylus (Ancylastrum) Cumingianus Bourguignat, may 1853, as the type species of the genus so named
Authors: International Commission on Zoological Nomenclature
Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1955, in volume 11, issue 14, pages 203-214
Created: 2015-05-26, modified: 2025-12-17
Opinion 366 Suppression, under the Plenary Powers, of the specific name multimaculata Jan, 1863, as published in the combination Crotalus lugubris var. Multimaculata, for the purpose of rendering the specific name Polysticta Cope, 1865, as published in the combination Caudisona Polysticta, the oldest available name for the Mexican Lance-Headed Rattlesnake (class Reptilia, order Squamata)
Authors: International Commission on Zoological Nomenclature
Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1955, in volume 11, issue 16, pages 231-244
Created: 2015-05-26, modified: 2025-12-17
Opinion 369 Suppression under the Plenary Powers of the generic names Tylos Meigen 1800 (class Insecta, order Diptera) and Tylos Heyden 1826 (class Arachnida) and validation thereby of the generic names Tylos Audouin, (1826) (class Crustacea, order Isopoda) and Micropeza Meigen 1803 (class Insecta, order Diptera)
Authors: International Commission on Zoological Nomenclature
Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1955, in volume 11, issue 19, pages 265-300
Created: 2015-05-22, modified: 2025-12-17
Opinion 371 Suppression under the Plenary Powers of the generic name Protoechinus Austin (T.), 1860, for the purpose of rendering the generic name Pholidocidaris Meek & Worthen, 1869 (class Echinoidea) the oldest available name for the genus concerned
Authors: International Commission on Zoological Nomenclature
Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1955, in volume 11, issue 21, pages 321-338
Created: 2015-05-25, modified: 2025-12-17
Opinion 372 Suppression under the Plenary Powers of the generic names Eriechinus Pomel, 1883, and Typhlechinus Neumayr, 1889, for the purpose of rendering the generic name Lovenechinus Jackson, 1912, the oldest available name for the genus concerned (class Echinoidea)
Authors: International Commission on Zoological Nomenclature
Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1955, in volume 11, issue 22, pages 339-358
Created: 2015-05-25, modified: 2025-12-17
Opinion 376 Suppression under the Plenary Powers of the generic name Lobacantha Kirby (W.), 1837, for the purpose of rendering the generic name Platypria Guerin-Meneville, 1840 (class Insecta, order Coleoptera) the oldest available name for the genus concerned
Authors: International Commission on Zoological Nomenclature
Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1955, in volume 11, issue 26, pages 391-400
Created: 2015-05-25, modified: 2025-12-17
Particulars of action in regard to the Rulings given in Opinions 1 to 16 and in Declarations 1 to 9 taken by the International Congress of Zoology in the period 1948—1955 and by the International Commission on Zoological Nomenclature in the same period
Authors: International Commission on Zoological Nomenclature
Published in Opinions and Declarations Rendered by the International Commission on Zoological Nomenclature, in 1955, in volume 1A, issue 26, pages 305-358
Created: 2015-06-14, modified: 2025-12-17
Corrigenda ; Authors' and Subject Indexes
Authors: International Commission on Zoological Nomenclature
Published in Opinions and Declarations Rendered by the International Commission on Zoological Nomenclature, in 1955, in volume 1A, issue 27, pages 359-380
Created: 2015-06-14, modified: 2025-12-17
Direction 11 Determination of the gender to be attributed to the names of one hundred and seventy-four genera of the order Decapoda (class Crustacea) placed on the Official List of Generic Names in Zoology in the period up to the end of 1936
Authors: International Commission on Zoological Nomenclature
Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1955, in volume 1C, issue C.2, pages 15-34
Created: 2012-04-04, modified: 2025-12-17
Direction 12 Validation under the Plenary Powers of the generic name Astacus Fabricius, 1775 (class Crustacea, order Decapoda) (correction of an erroneous entry made in the Official List of Generic Names in Zoology by the ruling given in Opinion 104)
Authors: International Commission on Zoological Nomenclature
Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1955, in volume 1C, issue C.3, pages 35-56
Created: 2015-05-25, modified: 2025-12-17
Direction 15 Correction of an erroneous entry on the Official List of Generic Names in Zoology relating to the generic name Penaeus (emend. of Peneus) Weber, 1795 (class Crustacea, order Decapoda) (correction of an error in Opinion 104)
Authors: International Commission on Zoological Nomenclature
Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1955, in volume 1C, issue C.5, pages 67-80
Created: 2015-05-25, modified: 2025-12-17
Direction 17 Addition to the Official List of Generic Names in Zoology of the names of fifteen genera of the class Aves, the type species of each of which was determined by Linnean tautonymy (Direction supplementary to Opinion 16)
Authors: International Commission on Zoological Nomenclature
Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1955, in volume 1C, issue C.8, pages 89-112
Created: 2015-05-25, modified: 2025-12-17
Direction 18 Designation under the Plenary Powers of a lectotype for the nominal species Columba macroura Linnaeus, 1758, to Secure that that name shall Apply to the Mourning Dove and that the name Columba migratoria Linnaeus, 1766, shall be the oldest available name for the Passenger Pigeon {Direction supplementary to Opinion 61)
Authors: International Commission on Zoological Nomenclature
Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1955, in volume 1C, issue C.9, pages 113-132
Created: 2015-05-25, modified: 2025-12-17
Direction 22 Addition to the Official List of Specific Names in Zoology of (a) the specific names of fifty-seven species, each of which is the type species of a genus in the class Mammalia, the name of which was placed on the Official List of Generic Names in Zoology in the period up to the end of 1936, and (B) of the specific names of two species belonging to the same class, each of which is currently regarded as the oldest available name for the type species of a genus, the name of which was placed on the Official List in the same period
Authors: International Commission on Zoological Nomenclature
Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1955, in volume 1C, issue C13, pages 179-200
Created: 2015-05-25, modified: 2025-12-17
Direction 19 Correction of an erroneous entry on the Official List of Generic Names in Zoology relating to the date and place of publication of the name Balaeniceps Gould, 1850 (class Aves) (correction of an error in Opinion 67)
Authors: International Commission on Zoological Nomenclature
Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1955, in volume 1C, issue C.10, pages 133-144
Created: 2015-05-25, modified: 2025-12-17
Direction 21 Validation under the Plenary Powers of the generic names Bubo Dumeril, 1806, Coturnix Bonnaterre, 1790, Egretta Forster, 1817, and Oriolus Linnaeus, 1766 (class Aves), by the suppression of older Homonyms published by Brisson in 1760 (validation of four erroneous entries on the Official List of Generic Names in Zoology made by the ruling given in Opinion 67)
Authors: International Commission on Zoological Nomenclature
Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1955, in volume 1C, issue C.12, pages 161-178
Created: 2015-05-25, modified: 2025-12-17
Direction 23 Action taken in Completion of the rulings given under the Plenary Powers in Opinion 108 and Opinion 109 validating the generic names Gazella Blainville, 1816, and Hippotragus Sundevall, 1846, respectively (class Mammalia)
Authors: International Commission on Zoological Nomenclature
Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1955, in volume 1C, issue C.14, pages 201-218
Created: 2015-05-25, modified: 2025-12-17
Direction 25 Validation, under the Plenary Powers, of the generic name Favus Lanchester, 1900 (class Crustacea, order Decapoda) (validation of an erroneous entry on the Official List of Generic Names in Zoology made by the ruling given in Opinion 73)
Authors: International Commission on Zoological Nomenclature
Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1955, in volume 1C, issue C.16, pages 247-258
Created: 2015-05-25, modified: 2025-12-17
Direction 29 Substitution of an amended entry on the Official List of Generic Names in Zoology relating to the name Segestria Latreille, 1804 (class Arachnida) in place of the Incorrect entry thereon of the name Segestria Walckenaer, 1805, made by the ruling given in Opinion 104
Authors: International Commission on Zoological Nomenclature
Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1955, in volume 1C, issue C.18, pages 273-286
Created: 2015-05-25, modified: 2025-12-17
Direction 30 Determination of the gender to be attributed to the names of fifty-seven genera of fishes, Cyclostomes, Reptiles and Amphibia placed on the Official List of Generic Names in Zoology in the period up to the end of 1936
Authors: International Commission on Zoological Nomenclature
Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1955, in volume 1C, issue C.19, pages 287-298
Created: 2015-05-25, modified: 2025-12-17