The purpose of this application, under Article 75.6 of the Code, is to conserve the current usage of the name Cerithiopsis tubercularis (Montagu, 1803) for a species of cerithiopsine gastropod from the southern coast of Great Britain. The lectotype of Cerithiopsis tubercularis (Montagu, 1803) is not in taxonomic accord with the current usage of this name and the confusing description ignoring the part bearing the most obvious diagnostic characters led to considerable confusion. It is proposed that the previous type fixations for the species Cerithiopsis tubercularis (Montagu, 1803) be set aside and a neotype consistent with the current usage be designated.

The purpose of this application, under Article 23.9.3 of the Code, is to conserve the widely used pseudoscorpion generic name Neobisium Chamberlin, 1930 by giving it precedence over the genus-group name Blothrus Schiödte, 1847, which is currently used as a subgenus or synonym of Neobisium. The name Neobisium is in widespread use for a group of pseudoscorpions found in the western Palaearctic region.

The purpose of this application, under Article 23.9.3 of the Code, is to conserve the family-group names athetini Casey, 1910 and geostibina Seevers, 1978 for a group of rove beetles. The names are threatened by a little used senior synonym callicerini Jakobson, 1908. The name athetini Casey, 1910 has become widely accepted and is in prevailing usage. The names callicerini Jakobson, 1908 (Insecta, Coleoptera) and callicerini Rondani, 1845 (Insecta, Diptera) are homonyms resulting from similarity of the names of their type genera, Callicerus Gravenhorst, 1802 and Callicera Panzer, 1809, respectively. This homonymy should be removed as required by Article 55.3.1 of the Code. It is proposed that the name callicerini Jakobson, 1908 be suppressed.

The purpose of this application, under Article 70.2 of the Code, is to conserve the current usage of the names Sturmia Robineau-Desvoidy, 1830, Senometopia Macquart, 1834 and Drino Robineau-Desvoidy, 1863 for three wellestablished genera of tachinid flies. The type species of Sturmia has long been assumed to be Sturmia vanessae Robineau-Desvoidy, 1830 and the type species of Senometopia Macquart, 1834 has long been assumed to be Carcelia aurifrons Robineau-Desvoidy, 1830. However, the correct type species for both Sturmia and Senometopia is Sturmia atropivora Robineau-Desvoidy, 1830, which is currently recognised as a valid species of Drino. Acceptance of S. atropivora as the type species of Sturmia and Senometopia would change the current concept of those genera to that of Drino, and the names of the current genera Sturmia and Senometopia would change to those of the next available genus-group names. To avoid the nomenclatural instability that would result from following the Principle of Priority, it is proposed that all type fixations for Sturmia Robineau-Desvoidy, 1830 prior to that of Sturmia vanessae Robineau-Desvoidy, 1830 by Robineau-Desvoidy (1863) be set aside, along with all type fixations for Senometopia Macquart, 1834 prior to that of Carcelia aurifrons Robineau-Desvoidy, 1830 by Townsend (1916).

The purpose of this application, under Article 23.9.3 of the Code, is to conserve the widely used genus name Trachelus Jurine, 1807 in its accustomed usage. The name Trachelus is threatened by its senior synonym Astatus Panzer, [1801]. Strict application of the Principle of Priority would also involve the recombination with a new genus name for the ‘black grain stem sawfly’, Trachelus tabidus (Fabricius, 1775), which is a pest of cereals in the southern West Palaearctic and in North America. It is proposed that Trachelus should be given precedence over Astatus whenever the two are considered to be synonyms.

The Commission has ruled that the specific name of the heteropod Atlanta inflata Gray, 1850 (atlantidae), originally published as a primary homonym of the pteropod Atlanta inflata d'Orbigny, 1836 (usually cited as Limacina inflata, currently Heliconoides inflata) (limacinidae), is not invalid by reason of being a junior primary homonym. This conserves the name of a heteropod commonly found in Pacific Ocean plankton.

The Commission has ruled that the application for the proposed conservation of the species-group names Heliconius tristero Brower, 1996 and Heliconius melpomene mocoa Brower, 1996 (Lepidoptera: nymphalidae): for mimetic butterflies from the Putumayo region of southeastern Colombia by suppressing the senior name Heliconius melpomene bellula Brown, 1979 is not approved.

The Commission has conserved the established usage of the specific name Myopa testacea (Linnaeus, 1767) for a well-known and widespread species of thick-headed fly (Diptera, conopidae) by setting aside all previous type fixations and designating a neotype.

The prevailing usage and concept of the species Megalosaurus crenatissimus Depéret, 1896 (currently Majungasaurus crenatissimus) has been conserved by replacement of the existing, non-diagnostic holotype with a neotype.

The Commission has conserved the current usage of the widely used generic name Atrichornis Stejneger, 1885, which has been in universal use as a valid generic name for almost 90 years, for the Australian scrub-birds (atrichornithidae), by suppression of the name Atricha Gould, 1844, which was used in the incorrect subsequent spelling Atrichia for the scrub-birds into the first decade or so of the 20th century.