The purpose of this application, under Articles 55.3.1 and 81 of the Code, is the suppression of the hemipteran insect genus-group name Scaris Le Peletier & Audinet-Serville, 1828 and family-group names based on it to remove the homonymy between the parrotfish family-group name Scaridi (currently Scaridae) Rafinesque, 1810 (type genus ScarusForsskål, 1775) and the insect family-group name Scarides (Scaridae) Amyot & Audinet-Serville, 1843 (type genus Scaris Le Peletier & Audinet-Serville, 1828), and also to conserve the usage of the name DocalidiaNielson, 1979 for a large genus of Neotropical leafhoppers.

The purpose of this application, under Articles 78.1 and 81.1 of the Code, is to conserve the established usage of the species name Arion vulgaris with the authorship of Moquin-Tandon (1855). This name was very frequently used in the last several years, but was primary published as a synonym of Arion rufusLinnaeus, 1758 and it is not available under Article 11.6 of the Code. To avoid confusion and further disturbance of nomenclature the Commission is requested to validate the availability of this name and its authorship.

The purpose of this application, under Article 23.9.3 of the Code, is to conserve the widely used specific name Larca lata (Hansen, 1884) for a species of pseudoscorpion from northern and central Europe. The name is threatened by the senior subjective synonym Garypus hungaricusTömösváry, 1882, which has seldom been used since its first publication. Therefore, precedence of the name Larca lata (Hansen, 1884) is proposed.

The purpose of this application, under Articles 11, 23, 31 and 32 of the Code, is to confirm the availability of and to maintain the usage of the name Galago demidoffFischer, 1806 for Demidoff's Dwarf Galago from western and central Africa and its priority over the objective junior synonym Macropus (Galago) demidoviiFischer, 1808, and to suppress subsequent incorrect spellings, under Articles 19 and 33 of the Code. The original specimen of Galago demidoffFischer, 1806 has been destroyed so a further purpose of this application is to designate a neotype, under Article 75.3 of the Code. A name of dubious identity, Lemur minutusCuvier, 1797, has been confused with that of Galago demidoff and Galago senegalensisGeoffroy, 1796. This name has had no valid usage for well over a century and is here regarded as a nomen oblitum, under Article 23 of the Code. In order to clarify taxonomic status, it is also proposed to designate a neotype for Lemur minutusCuvier, 1797, under Article 75.3 of the Code. It is proposed that G. demidoff should be maintained as the prior name for the taxon and that all subsequent incorrect spellings of the name be suppressed.

The purpose of this application, under Articles 70.2 and 81.1 of the Code, is to preserve stability in the taxonomy of the beetle family Dytiscidae by designating DytiscusunistriatusGoeze, 1777 as the type species of BidessusSharp, 1880. The discovery of an earlier use of the name Bidessus, previously attributed to Sharp in 1882, with DytiscusgeminusFabricius, 1792 as type species, results in disruptive nomenclatural changes in the family Dytiscidae if accepted.

The purpose of this application, under Articles 65.2.2 and 81.1 of the Code, is to conserve the current usage of the generic name RipiphorusBosc, 1791 and the familygroup name RipiphoridaeLaporte, 1840. The current usage of Ripiphorus is threatened by the discovery that its first valid type-species designation is Mordella paradoxa Linnaeus, 1760 which would result in Ripiphorus being the valid name for the species currently included in MetoecusDejean, 1834 and MyoditesLatreille, 1819 being the valid name for the species currently placed in Ripiphorus. In addition, the current usage of Ripiphoridae would be threatened because of the altered concept of its type genus. In order to avoid nomenclatural instability we propose that Ripiphorus subdipterus Fabricius, 1792 be designated as the type species of Ripiphorus and that the Commission rule that Laporte (1840) used Ripiphorus in the currently-accepted sense.

The purpose of this application, under Article 67.2 of the Code, is to conserve the current usage of the generic name BothriembryonPilsbry, 1894, a well-established genus of land snail endemic to the southern half of Australia and whose name has been used consistently for over a century. Bothriembryon is a replacement name for LiparusAlbers, 1850, a junior homonym of LiparusOlivier, 1807 (Coleoptera), and automatically takes its type species (Article 67.8). The name is threatened by a change in the type species of Liparus. Although no type species was originally designated for LiparusAlbers, 1850, the two species originally included in Liparus are currently placed in genera of different families. Pilsbry (1894) designated Helix meloQuoy & Gaimard, 1832 as the type species for the replacement name Bothriembryon, but it is invalid as it is not one of the originally included species. Acceptance of either of the originally included species in Liparus would mean the synonymy of Bothriembryon with either PygmipandaIredale, 1933 (type species Bulimus atomatusGray, 1834 by original designation) or LeucotaeniusAlbers & Martens, 1860 (type species Bulimus favanniiLamarck, 1822 by original designation), respectively. To promote nomenclatural stability, it is proposed that all type species fixations for the genus LiparusAlbers, 1850 be set aside, and to designate Helix meloQuoy & Gaimard, 1832 as the type species.

The purpose of this application, under Article 23.9.3 of the Code, is to conserve the usage of the family-group name PlatypleuriniSchmidt, 1918 and its derivatives for a group of Old World cicada species, by giving it precedence over the senior synonym HamzariaDistant, 1905. Platypleurini was recently synonymised with Hamzini following molecular data that appeared in a dissertation. Platypleurini was used for the family group containing Platypleura from 1918 to the present day in at least 127 publications, while only four papers have applied Hamzini in the new sense (including Platypleura).

The purpose of this application, under Article 23.9.3 of the Code, is to conserve the widely used generic name StenonasterLambert, 1922 (Echinoidea, Stenonasteridae). The name Stenonaster is threatened by its senior objective synonym Stenocorys Lambert, 1917, that was erroneously considered a junior homonym of StenocorisBurmeister, 1839 (Arthropoda, Hemiptera, Alydidae) and StenocorisRambur, 1839 (= ParomiusFieber, 1861; Arthropoda, Hemiptera, Rhyparochromidae). Strict application of the Code would result in unnecessary confusion since the name Stenonaster has been explicitly used in the geological and palaeontological literature for the last 100 years whereas its senior objective synonym Stenocorys has not been used since it was (erroneously) replaced by Stenonaster. Stenonaster is the type-genus of the family Stenonasteridae, an enigmatic, but important missing link between the two major groups of atelostomate echinoids: Holasteroida and Spatangoida. Reverting the genus name to its senior synonym would necessitate changing the name of this family, which would lead to nomenclatural instability and confusion in the literature. We therefore request a reversal of precedence under the Commission's plenary power, with Stenocorys and Stenocoridae, the senior objective synonyms being suppressed and Stenonaster and Stenonasteridae given precedence.

The International Commission on Zoological Nomenclature has used its plenary power to designate a neotype for Pieris virginiensisEdwards, 1870.

The International Commission on Zoological Nomenclature has used its plenary power to grant conditional precedence to Elasmostethus dorsalisJakovlev, 1876 over Acanthosoma vicinumUhler, 1861 for a species of subsocial acanthosomatid bug from the Russian Far East.

The International Commission on Zoological Nomenclature has used its plenary power to rule that the specific name of Bulimus rupestrisPhilippi, 1836 is not invalid by reason of it being a junior primary homonym of the specific name of BulimusrupestrisKrynicki, 1833.

The International Commission on Zoological Nomenclature has declined to use its plenary power to set aside all previous fixations of type species for AlabinaDall, 1902 prior to the designation of Alaba cerithidioidesDall, 1889 by Dall (1902).

The International Commission on Zoological Nomenclature has declined to use its plenary power to conserve the specific name Pomachilus variegatusSchwarz, 1904 by suppressing the senior secondary homonym Aeolus variegatusCurtis, 1839.

The International Commission on Zoological Nomenclature has used its plenary power to conserve the specific name of Cicindela variansGory, 1833 by suppressing its primary senior homonym Cicindela variansLjungh, 1799.

The International Commission on Zoological Nomenclature has used its plenary power to set aside all previous fixations of type species for the nominal genus ThorectesMulsant, 1842 prior to the designation of Scarabaeus laevigatusFabricius, 1798 by López-Colón & Alonso-Zarazaga (2006) which it has accepted as valid.

The name that has been in use for over 80 years, based on the combination Sylvia ruficeps, has been shown to have three bibliographic sources. New research shows that in-use name to have been chronologically the second name introduced for the taxon. It is preceded by the name Hylophilus ruficeps in a plate caption, and associated colour image, labelled with a preoccupied name given to an entirely different species. That miscaptioned plate thus introduced a junior homonym and has date precedence. The third source, the text page associated with the image that appeared first, and using the same junior homonym, was published two years later. The name brought into use, due to a previous lack of sound dates of publication, was an available combination and was validly published. The consequence of the changed chronology is that the junior homonym can be disregarded but that a note should be retained that the image in the plate is that of the bird that we now know as Thlypopsis ruficeps.

The purpose of this case, under Articles 15.2.1, 45.6.4.1, 75.5, 75.6, 76, and 81 of the Code, is to eliminate nomenclatural chaos within Hesperia comma-group butterflies in western North America caused by seven lectotypes and a holotype whose appearance and inadequate or mislabeled localities do not allow their taxonomic identity to be determined, by employing Art. 75.5 to designate seven neotypes for the following names: PamphilacoloradoScudder 1874, Pamphila manitobaScudder, 1874, Pamphila cabelusEdwards, 1881, Pamphila harpalusEdwards, 1881, Pamphila idaho Edwards, 1883, PamphilaoregoniaEdwards, 1883, and Hesperia colorado ochraceaLindsey, 1941. The neotypes will provide stable names for nine taxa and conserve six names that have been in prevailing usage for many decades.

The purpose of this application under Articles 78.1 and 81 of the Code is to request the Commission to use its plenary power to choose among two alternatives in order to preserve the genus name Darevskia and nomenclatural stability.

In Alternative A, the Commission is asked to accept the microfiche publication (Arribas, 1997) as a published work in the sense of the Code and made available the names included therein, placing IberolacertaArribas, 1997 and Darevskia Arribas, 1997 on the Official List of Generic Names in Zoology, their type species on the Official List of Specific Names in Zoology, and the microfiche edition of Arribas (1997) on the Official List of Works Approved as Available for Zoological Nomenclature. This action will promote stability, as both names are widely accepted and, if the 1997 publication in microfiche is considered unavailable, then Darevskia Arribas, 1997 could potentially be threatened by Caucasilacerta Harris et al., 1998 (by authors who would not consider this name a nomen nudum), which would clearly disrupt stability. Not only would this alternative be the best way to preserve nomenclatural stability as stressed in the ICZN Preamble and repeated in several Articles of the Code, but it would also be the only way to ensure that these names (available at the time of their publication) remain available after the retroactive changes that have been introduced between the third and fourth editions of the Code. If Alternative A is chosen, both Iberolacerta and Darevskia become available from Arribas (1997).

In Alternative B, the microfiche publication (Arribas, 1997) is considered invalid and placed on the Official Index of Rejected and Invalid Works in Zoological Nomenclature. Both Iberolacerta and Darevskia would be considered published in Arribas (1999). Also, the Commission is asked to place on the Official Index of Rejected Generic Names in Zoology the name CaucasilacertaHarris et al., 1998 (as a nomen nudum due to the lack of a valid diagnosis) and to place on the Official List of Generic Names in Zoology the names IberolacertaArribas, 1999 and DarevskiaArribas, 1999.

The purpose of this application, under Articles 41 and 65.2 of the Code, is to conserve the well-established current use of the hesperiid tribe ErynniniBrues & Melander, 1932 (subfamily Pyrginae) by suppressing its three senior homonyms ErynnidiTutt, 1906, ErynnidaeSwinhoe, 1913, and ErynnidaeHampson, 1918, which were based on the same genus ErynnisSchrank, 1801, the last based on many distinct and invalidly fixed type species.

The purpose of this application, under Article 23.9.3 of the Code, is to conserve the specific name Dasypeltis atraSternfeld, 1912 which is in widespread use for a widely distributed species of snake (family Colubridae) from central and eastern Africa by giving it precedence over its seldom-used senior synonym Dasypeltis lineolataPeters, 1878. Dasypeltis lineolata was used as a valid name in 1884 and 1894, and then again only in 2016.

The purpose of this application, under Articles 23.9.3, 81.2.1 and 81.2.3 of the Code, is to conserve the name Curculio antirrhiniPaykull, 1800, a common Palaearctic weevil species currently belonging to the genus Rhinusa Stephens, 1829 (Curculionoidea, Curculionidae) by giving it precedence over the little-used older name Curculio noctis Herbst, 1795 whenever these names are considered synonyms.

The purpose of this application, under Article 75.6 of the Code, is to conserve the current usage and concepts of the Late Devonian genus CostaclymeniaSchindewolf, 1920 and the family CostaclymeniidaeRuzhencev, 1957, by setting aside all previous types and to designate as a neotype for Goniatites binodosusMünster, 1832, a specimen from the type locality. CostaclymeniaSchindewolf, 1920 is a widely used genus name, but the type species Goniatites binodosusMünster, 1832 is known almost entirely from secondary material. The fragmentary holotype has not been referred to since the original description and is probably lost. Without a neotype for the species binodosus, the genus Costaclymenia and the family Costaclymeniidae would all be problematic taxa.

The purpose of this application, under Article 23.9.3 of the Code, is to conserve the specific name Chrysomela tenebricosaFabricius, 1775 for a common and widespread species of European bloody-nosed beetle in the genus Timarcha (Chrysomelidae) by giving it precedence over the misinterpreted and unused senior synonym Tenebrio laevigatusLinnaeus, 1767.

The purpose of this application, under Article 23.9.3 of the Code, is to conserve the widely used specific name Hybosorus illigeriReiche, 1853 (Coleoptera: Scarabaeoidea, Hybosoridae), a globally widespread and common scarab beetle. The name is threatened by the very rarely used senior subjective synonyms Hybosorus pinguisWestwood, 1845, Hybosorus roeiWestwood, 1845, and Hybosorus carolinusLeConte, 1847. Precedence of the name Hybosorus illigeri is proposed to maintain stability of nomenclature.

The purpose of this application under Article 23.9.3 of the Code is to conserve the current usage of the well-established genus-group name AnastrephaSchiner, 1868 for a genus of Neotropical fruit flies by reversal of precedence with its senior synonym, ToxotrypanaGerstaecker, 1860, under the plenary power of the Commission, in the interest of nomenclatural stability. Recent morphological and molecular studies demonstrate that the two genera are synonyms, however, while only one species of Toxotrypana is an agricultural pest, the multiple major pest species currently placed in Anastrepha have far greater impact on numerous commercial and subsistence fruit crops. The synonymy will involve changing their names and this would cause tremendous nomenclatural instability and disrupt scientific research and communication regarding their taxonomy, basic biology, management, and regulation.

The purpose of this application, under Articles 55.3.1 and 29 of the Code, is to remove homonymy between the family-group name DiphyiniSimon, 1894 currently placed in Tetragnathidae (Araneae) and the hydrozoan family-group name DiphyidaeQuoy & Gaimard, 1827. It is proposed that the spelling of the spider name (based on the generic name Diphya Nicolet, 1849) be emended to give Diphyaini, while leaving the hydrozoan name (based on the generic name DiphyesCuvier, 1817) unaltered.

The International Commission on Zoological Nomenclature has not conserved the generic name Lychnorhiza Haeckel, 1880 for a genus of scyphozoan jellyfish (Cnidaria, Scyphozoa) that is threatened by a senior synonym, Rhacopilus Agassiz, 1862, which has not been used since its original description. The name lucerna Haeckel, 1880 (proposed in the binomen Lychnorhiza lucerna and specific name of the type species of Lychnorhiza), which is threatened by the senior subjective synonym, RhizostomacruciatumLesson, 1830, was also not conserved. Instead, the Commission has made these two nominal species objective synonyms of each other under its specific powers by designating the extant holotype of the former as the neotype of the latter.

The International Commission on Zoological Nomenclature has declined to designate Obisium muscorum Leach, 1817 as the type species of Obisium Leach, 1814.

The International Commission on Zoological Nomenclature declined to use its plenary powers to designate a neotype for Grallaria fenwickorum Barrera & Bartels in Barrera, Bartels & Fundación ProAves de Colombia, 2010. The Commission has also declined to use its plenary power to grant precedence to Grallaria urraoensisCarantón-Ayala & Certuche-Cubillos, 2010 over G. fenwickorum whenever these two specific names are considered to be synonyms. Furthermore, it has declined to use its specific powers to confirm that G. fenwickorum is available, being based on a name-bearing type consisting of samples from a photographed individual that was released.

The International Commission of Zoological Nomenclature has declined to conserve the specific name of the tussah silkmoth Antheraea royleiMoore, 1859 when it is considered synonymous with its supposed wild progenitor Antheraea pernyi (Guérin-Méneville, 1855).

The International Commission on Zoological Nomenclature has conserved the specific name of the hollyhock weevil Apion longirostre Olivier, 1807 by suppressing the specific name of its senior primary homonym Apion longirostreGravenhorst, 1807.

The International Commission on Zoological Nomenclature has conserved the usage of the generic name Siphonichnus Stanistreet, le Blanc Smith & Cadle, 1980 for an important group of indicator trace fossils, by giving it precedence over its rarely-used senior subjective synonym OpthalmichniumPfeiffer, 1968.

The horse conch of the southeastern United States and eastern Mexico has been a subject of intermittent nomenclatural controversy: Fasciolaria papillosa G.B. Sowerby I, 1825 vs. Fasciolaria giganteaKiener, 1840. The original description of F. papillosa is very brief and is judged by some to be inadequate; no illustration or locality is provided, at least two described features are incompatible with the horse conch, and an extensive search has revealed no type material. Fasciolaria gigantea was introduced with a comprehensive description and figures that unmistakably depict the horse conch. The first figures associated with F. papillosa appeared more than two decades after its description (Reeve, 1847). Shells that Reeve figured as F. papillosa are conspecific with F. gigantea, which led to the subsequent controversy, but it is not clear that Reeve correctly identified F. papillosa. Fasciolaria gigantea has an extensive history of usage in modern literature, especially during the past 70+ years (300 vs. 3 reports of F. papillosa, 1953–2002; 18 of F. gigantea vs. 5 of F. papillosa, 2003–2017). Berschauer (2017) designated a shell figured by Reeve (1847) as neotype for Fasciolaria papillosa, which would make F. papillosa a senior subjective synonym of F. gigantea and disrupt prevailing usage, but that neotype designation does not meet specifications dictated by Articles 75.3 of the Code and therefore is invalid. We concur with authors who have recommended that Fasciolaria papillosaSowerby, 1825 be regarded as a nomen dubium. The name Fasciolaria giganteaKiener, 1840 should be used for the horse conch, now properly called Triplofusus giganteus (Kiener, 1840).

This application has two purposes. The first is to conserve, by neotypification under Articles 75.6 and 81.1 of the Code, usage of the species group name assimilisJardine & Selby, 1828, universally employed for the Australo-Wallacean spotted harrier in the genus Circus Lacépède, 1799 from the end of the 19^th century to the present. As we show here, C. assimilis is threatened because its holotype is identifiable instead with the southwest Pacific swamp harrier, long known as C. approximansPeale, 1848. The second purpose of this application is to conserve, under Articles 81.1 and 81.2.2 of the Code, the species group name approximansPeale, 1848 for the swamp harrier itself. It is threatened by the simultaneously published, but senior by first reviser determination, C. juxtaPeale, 1848. No cases have been found of juxta being used as valid since 1956; and usages were few before then. Accordingly, its suppression is requested here because of the great disturbance its uptake would bring to the nomenclature of the widespread and familiar southwest Pacific swamp harrier.

The purpose of this application under Article 8.1.2, Article 8.1.3.1, Article 8.5.3 and Article 9.11 of the Amendment to the Code (ICZN, 2012) is to declare the pamphlet “Procrustomachia” 2016–2018 (Vols. 1–3) as an unavailable work from a nomenclatural viewpoint and all new scientific names and nomenclatural acts published in it so far to be unavailable because the number of original printed copies is not sufficient to make the works accessible to the scientific community according to Art. 8.1.3.1 (ICZN, 2012).

The purpose of the present application, under Articles 75.5 and 75.6 of the Code, is to conserve the names Bengalia jejuna (Fabricius, 1787) and Bengalia torosa (Wiedemann, 1819) in their accustomed usage for two Oriental blowflies by setting aside the three female syntypes of Musca jejunaFabricius, 1787 and the male and female syntypes of Musca torosaWiedemann, 1819, which are either not conforming to the prevailing usage of the names or unidentifiable, and in each case by replacing them with a male neotype.

The purpose of this application under Article 81 of the Code is to conserve the name StylinaLamarck, 1816 in its accustomed usage by designating a new type species Stylina insignisFromentel, 1861 and to designate a lectotype. StylinaLamarck, 1816 is a Mesozoic genus distributed worldwide that contains hundreds of species names. The genus is the nominate taxon of the Stylinidae and even the basis for the suborder Stylinina, but the type species Stylina echinulataLamarck, 1816 cannot be identified.

The purpose of this application, under Article 23.9.3 of the Code, is to conserve the specific names Clausilia indexMousson, 1863, Clausilia semilamellataMousson, 1863 and Clausilia derasaMousson, 1863, for three terrestrial snail species (family Clausiliidae) by suppressing the unused senior synonyms Clausilia unilamellataMousson, 1856, Clausilia multilamellataMousson, 1856 and Clausilia firmataMousson, 1856, respectively.

The purpose of this application, under Article 75.6 of the Code, is to confirm the availability and to maintain the usage of the genus Petalodus Owen, 1840, which is threatened by the identity of the type specimen of its type species Petalodus hastingsii Owen, 1840. The description and figure of the specimen by Owen (1840) do not match the actual specimen, nor does it resemble the subtriangular crowns traditionally referred to the form taxon Petalodus described and illustrated by Agassiz (1838: 108–109, pl. 19, figs. 11–13) as Chomatodus (subsequently Petalodus acuminatus by Agassiz, 1843: 159, 174, nota). Additional, more complete, specimens from the same bed and locality as Owen's specimen were described and illustrated by Arthur Woodward (1889) as Petalodus acuminatus. The crowns of these teeth are labial-lingually compressed, vertically short, broad-based, subtriangular, and convex labially and concave lingually. In the subsequent 170 years, teeth identified and published as Petalodus have referred to the subtriangular teeth as described by Agassiz and Woodward, and not to the rectangular lamelliform tooth described by Owen. The Commission is therefore asked to exercise its plenary power to set aside the misleading and inadequate holotype, NHMUK PV P613, and designate as neotype specimen NHMUK PV P75414, a more complete tooth that shows all the characteristic features of Petalodus.

The purpose of this application under Article 23.9.3 of the Code is to conserve the name OrchestesIlliger, 1798 (Curculionoidea, Curculionidae), a large and well-known weevil genus, by giving it precedence over the little-used older name SaliusSchrank, 1798 whenever these names are considered to be synonyms.

The International Commission on Zoological Nomenclature has declined to use its plenary power to set aside the existing holotype of Chilicola vicugna Toro & Moldenke, 1979 and designate a neotype.

The International Commission on Zoological Nomenclature has conserved the name CollohmanniaSellnick, 1922 by giving it precedence over its senior subjective synonym EmbolacarusSellnick, 1919.

The International Commission on Zoological Nomenclature has declined to use its specific powers to rule that ‘Formenkreis’ (plural ‘Formenkreise’) is not a genus-group taxonomic rank with potential availability.

The International Commission on Zoological Nomenclature has used its plenary power to conserve the generic names LiancalusLoew, 1857 and ScellusLoew, 1857 by designating Dolichopus regiusFabricius, 1805 as type species of AnoplomerusRondani, 1856.

The International Commission on Zoological Nomenclature has conserved the usage of the name CylindrusFitzinger, 1833 and CylinderMontfort, 1810 by suppressing all senior homonyms of each nominal genus.

The International Commission on Zoological Nomenclature has conserved the annelid generic name CognettiaNielsen & Christensen, 1959 by giving it precedence over two senior subjective synonyms, EuenchytraeusBretscher, 1906 and ChamaedrilusFriend, 1913.

The International Commission on Zoological Nomenclature (ICZN) has used its plenary power to conserve existing usage of the name Columba liviaGmelin, 1789 for the common domestic pigeon by granting it precedence over the senior subjective synonyms C. domesticaLinnaeus, 1758, C. gutturosaLinnaeus, 1758, and C. cucullataLinnaeus, 1758. The ICZN has also used its plenary power to conserve existing usage of the trinomen Columba livia domesticaLinnaeus, 1758 by setting aside Article 24.1 of the Code and granting domesticaLinnaeus, 1758 precedence over gutturosaLinnaeus, 1758 and cucullataLinnaeus, 1758 whenever either of the latter two are considered a synonym of it.

The International Commission on Zoological Nomenclature has declined to use its plenary power to replace the type species of the sauropod dinosaur genus DiplodocusMarsh, 1878 with D. carnegiiHatcher, 1901.

The International Commission on Zoological Nomenclature has ruled under the plenary power to set aside all previous type fixations for Nautilus pompiliusLinnaeus, 1758, and to designate as neotype an identifiable specimen with known provenance.

The International Commission on Zoological Nomenclature has used its plenary power to rescind Direction 71, which was issued in 1957 and which deemed deeming Lepisma Linnaeus, 1758 to be of feminine gender and all generic names derived from it (i.e. those ending in -lepisma) are now ruled to be of neuter gender.

The International Commission on Zoological Nomenclature has used its plenary power to conserve the specific name Mantis limbataBrullé, 1838 (currently Ameles limbata) by giving it precedence over its senior primary homonym Mantis limbata Hahn, 1835.

The International Commission on Zoological Nomenclature has emended the spelling of the name XylophagidaePurchon, 1941 (Mollusca, Bivalvia) to remove homonymy with XylophagidaeFallén, 1810 (Insecta, Diptera). The stem of the molluscan generic name XylophagaTurton, 1822 has been emended to Xylophaga- to give Xylophagaidae while the dipteran family group name (based on XylophagusMeigen, 1803) remains unchanged.