The purpose of this application, under Articles 23.9.3 and 81.1 of the Code, is to conserve the usage of the name Sycon (Porifera) for a genus of sponges by reversal of precedence with respect to its senior subjective synonym Scypha (Porifera). This is justified by the refusal of the wider community of sponge researchers to accept the adoption of Scypha as the valid name for this large and ubiquitous genus of calcareous sponges and by the current prevailing usage of the junior synonym. With reversal of precedence, stability of the nomenclature will be maintained, and confusion avoided.

The purpose of this application, under Article 23.9.5 of the Code, is to conserve the specific name Helix plicaria Lamarck, 1816, a junior primary homonym of Helix plicaria . These names are currently in use for two different groups of land and freshwater snails, respectively, and have not been treated as congeneric since 1828. Helix plicaria was first transferred to the genus Bulimus and subsequently to the genera Thiara , Melania , Melanoides and Stenomelania . Helix plicaria has either been treated as belonging to Helix , Cochlea or has been included in Hemicycla . It is proposed that Helix plicaria be conserved by ruling it is not invalid by reason of being a junior homonym of Helix plicaria .

The purpose of this application, under Article 55.3.1 of the Code, is to remove the homonymy between the family-group names Microcentrini (type genus Microcentrus ) (Insecta, Hemiptera, Membracidae) and Microcentrini (type genus Microcentrum ) (Insecta, Orthoptera, Phaneropteridae), by emending of the former to Microcentrusini . These two family-group names are based on similar but not identical type-genus names. It is proposed herein that the entire generic name Microcentrus be adopted as the grammatical stem, so the family-group name of Deitz () will become Microcentrusini, thus resolving the homonymy.

The purpose of this application, under Articles 23.9.3 and 81.1 of the Code, is to conserve the usage of the species-group name Simopithecus oswaldi by giving it precedence over its senior subjective synonym Cynocephalus atlanticus . Theropithecus is a common to dominant member of the extinct primate community across Africa after 4 million years ago () and often co-occurred with extinct humans (Hominini); fossils are also known rarely across Eurasia (Roberts et al., 2014). Most fossil samples are currently included in Theropithecus oswaldi (), which is often divided into chrono-geographic subspecies. Cynocephalus atlanticus was not recognized as a member of Theropithecus until 1973, and this nomen has seldom been used, but if it were shown (as seems likely) to be conspecific with Simopithecus oswaldi , widespread paleontological usage would be upset. It is thus proposed to give conditional precedence to the later name, which would still permit the use of Theropithecus atlanticus as a distinct species or subspecies of Theropithecus oswaldi. Lectotypes are designated for Simopithecus oswaldi olduvaiensis and Simopithecus oswaldi hopefieldensis .

The purposes of this application, under Articles 23.9.3 and 55.3.1 of the Code, are to conserve the current usage of (1) the family-group name Micruridae (Reptilia, Serpentes) for a family (sometimes treated as a subfamily) of New World coral snakes that frequently appear in literature pertaining not only to certain fields of herpetology but also to emergency medical care in Latin America; and (2) the nemertean family-group name Lineidae , by suppression of their senior homonym/ synonym Micruridae Ehrenberg, 1831 (Nemertea, Pilidiophora). The nemertean taxon Micrurinae was recognised as a subfamily of Lineidae until the early 20th century, but not since at least the 1970s. Afterwards, at the rank of family, Micruridae was used to refer to a differently constituted nemertean taxon in three ecological works published between 1998 and 2009.

The International Commission on Zoological Nomenclature has conserved current usage of the generic names Tibicina Kolenati, 1857 and Lyristes Horvath, 1926 by suppressing the generic name Tibicen Berthold, 1827 for the purposes of the Principle of Priority but not for those of the Principle of Homonymy. The International Commission on Zoological Nomenclature has also conserved current usage of the generic name Cicada Linnaeus, 1758 by designating Cicada orni Linnaeus, 1758 as the type species.

The International Commission on Zoological Nomenclature has conserved current usage of the generic name Bothriembryon Pilsbry, 1894 by designating Helix melo Quoy & Gaimard, 1832 as the type species for Liparus Albers, 1850. Bothriembryon is a replacement name of Liparus Albers, 1850, a junior homonym of Liparus Olivier, 1807 (Coleoptera).

The International Commission on Zoological Nomenclature has conserved current usage of the specific name of Hybosorus illigeri Reiche, 1853, a widespread species of scarabaeid beetle, by giving it precedence over the specific names of Hybosorus pinguis Westwood, 1845, Hybosorus roei Westwood, 1845 and Hybosorus carolinus LeConte, 1847

The International Commission on Zoological Nomenclature has conserved current usage of the generic name Stylina by designating a type species, Stylina insignis , as well as a lectotype for the species.

The International Commission on Zoological Nomenclature has conserved current usage of the generic name Anastrepha Schiner, 1868 for a group of Neotropical fruit flies, many of them major pest species, by conditionally reversing its precedence with respect to the senior synonym Toxotrypana Gerstaecker, 1860.

The International Commission on Zoological Nomenclature has used its plenary power to emend the spelling of the family-group name Diphyini Simon, 1894 (Araneae) to remove homonymy with Diphyidae Quoy & Gaimard, 1827 (Hydrozoa). The stem of the spider generic name Diphya Nicolet, 1849 has been emended to Diphyato give Diphyaini, while the hydrozoan generic name (based on the generic name Diphyes Cuvier, 1816) remains unaltered.

The International Commission on Zoological Nomenclature has conserved the current usage of the specific names of three terrestrial snail species, Clausilia index Mousson, 1863, Clausilia semilamellata Mousson, 1863 and Clausilia derasa Mousson, 1863, by suppressing their respective unused senior synonyms Clausilia unilamellata Mousson, 1856, Clausilia multilamellata Mousson, 1856 and Clausilia firmata Mousson, 1856.

The International Commission on Zoological Nomenclature has conserved current usage of the generic name Orchestes Illiger, 1798 (curculionoidea, Curculionidae), by giving it precedence over the little-used older name Salius Schrank, 1798 whenever these names are considered to be synonyms.

The validity of Laevicaulis as the objective senior synonym of Eleutherocaulis , both published simultaneously in a complex and confusing work as genus-group names for veronicellid slugs, is confirmed. The type species, in both cases by subsequent designation, is Vaginulus comorensis , a junior synonym of Vaginulus alte , now Laevicaulis alte, a widespread tropical and subtropical invasive species.