The purpose of this application, under Article 23.9.3 of the Code, is to conserve the generic name Myrmarachne MacLeay, 1839 for a well-known and widespread group of extant, ant-mimicking jumping spiders (Araneae, salticidae) by suppression of a little-used senior subjective synonym, Entomocephalus Holl, 1829, introduced for a fossil spider preserved in either Eocene Baltic amber or perhaps in Subrecent copal. Holl (1829) based this name on drawings in an earlier work by Schweigger (1819). This original description did not state the number of specimens, but only one was figured, which we presume to represent the holotype by monotypy. Its repository could not be traced and we are not aware of subsequent specimens which could provide a neotype. However, the illustration of an ant-like salticid by Schweigger is of sufficient quality that we consider it likely that Entomocephalus and Myrmarachne are synonyms.

The purpose of this application, under Articles 29 and 55.3.1 of the Code, is to remove homonymy between the family-group names zosiminae Alcock, 1898 (Crustacea, Decapoda) and zosimidae Seifried, 2003 (Crustacea, Copepoda) by changing the spelling of the junior homonym. It is proposed that the entire name Zosime Boeck, 1873 (Copepoda) be used to form zosimeidae, leaving the stem of the senior homonym (based on the name Zosimus A.-G. Desmarest, 1823; Decapoda) unchanged. Zosimus A.-G. Desmarest, 1823 and Zosime Boeck, 1873 are respectively the type genera of zosiminae Alcock, 1898 (Decapoda) and zosimidae Seifried, 2003 (Copepoda).

The purpose of this application, under Articles 29 and 55.3, is to emend the family-group name nomiidae Gozis, 1875 (Insecta, Coleoptera), a senior homonym of nomiinae Robertson, 1904 (Insecta, Hymenoptera), long-considered a synonym of psydrina LeConte, 1853, thereby removing the homonymy between the two names. It is proposed that the stem of the generic name Nomius Laporte, 1835, on which the beetle family-group name is based, be emended to give nomiusidae, while leaving the bee family-group name (based on Nomia Latreille, 1804) unaltered.

The purpose of this application, under Article 75.8 of the Code, is to conserve the specific name Testudo gigantea Schweigger, 1812 in its customary usage for the giant land tortoise (family testudinidae) found on Aldabra Atoll in the western Indian Ocean. Taxonomic and nomenclatural confusion in the 19th and early 20th centuries led to competing and contradictory proposals between 1982 and 2006 to supplant T. gigantea Schweigger, 1812, first with T. elephantina Duméril & Bibron, 1835 and then with T. dussumieri Gray, 1831. As a corollary, Aldabrachelys Loveridge & Williams, 1957, the genus-group name erected for the Aldabra tortoise, was supposedly reduced to a junior synonym of either the extinct Mascarene genus/subgenus Cylindraspis Fitzinger, 1835, or the South American genus/subgenus Chelonoidis Fitzinger, 1835, and replaced as the name of the Aldabra tortoise by the generic name Dipsochelys Bour, 1982. To stabilise the accustomed name of this species as Geochelone (Aldabrachelys) gigantea, a neotype of T. gigantea Schweigger, 1812 was designated in 2006. A subsequent claim of the rediscovery of the long-lost holotype now again threatens this usage and stable nomenclature by (1) rendering T. gigantea a junior subjective synonym of T. denticulata Linnaeus, 1766, (2) resurrecting the former nomen oblitum Testudo dussumieri Gray, 1831 for the Aldabra tortoise, and (3) setting aside the neotype of T. gigantea; this action also again threatens the established use of Aldabrachelys. The supposed holotype rediscovery is not unequivocally proven, and for the sake of nomenclatural universality and stability, it is proposed that the neotype designation of 2006 be affirmed and that T. dussumieri Gray, 1831 be suppressed.

The purpose of this application, under Article 81.1 of the Code, is to preserve stability in the taxonomy of sauropod dinosaurs by designating Cetiosaurus oxoniensis as the type species of Cetiosaurus. The genus Cetiosaurus (including the species C. medius and C. oxoniensis) was established during the earliest period of research on sauropod dinosaurs, and is historically significant. The name Cetiosaurus was fixed to the type species Cetiosaurus medius, a sauropod of indeterminate affinities; however, the fragmentary nature of the type material of C. medius, combined with the subsequent description of much more complete Middle Jurassic sauropod material as Cetiosaurus oxoniensis, has meant that subsequent literature has overwhelmingly adopted C. oxoniensis over C. medius as the primary exemplar of Cetiosaurus. Stability would be best served by designating Cetiosaurus oxoniensis as the type species of the genus Cetiosaurus in place of the current type species, C. medius.

The purpose of this application, under Articles 23.9.3 and 81.1 of the Code, is to conserve the long- and widely-accepted spelling Aplonis Gould, 18 October 1836 for the Indo-Australasian glossy starlings (sturnidae) by suppression of the prior but little used spelling Aplornis Gould, 1 or 3 October 1836.

The purpose of this application, under Articles 23.9.3 and 81.2.3 of the Code, is to conserve the generic name Procynosuchus Broom, 1937 for a group of Permian cynodonts (family procynosuchidae) by giving it precedence over the older names Cyrbasiodon Broom, 1931 and Parathrinaxodon Broom, 1936 whenever these genera are considered synonymous. These cynodonts are of considerable importance to synapsid phylogeny and represent a key point in widely used examples of transitional series in the fossil record.

The specific name of the heteropod Atlanta lesueurii J.E. Gray, 1850 (atlantidae), originally published as a primary homonym of the pteropod Atlanta lesueurii d'Orbigny, 1836 (currently Limacina lesueurii), is hereby conserved by ruling that the name is not invalid by reason of being a junior primary homonym.

The holotype of the deep-sea pandalid prawn Heterocarpus gibbosus Bate, 1888 is extremely poorly preserved. With this ruling it is replaced with a recently collected neotype from the type locality in the Philippines.

The Commission has ruled that the usage of the generic names Mecistocephalus Newport, 1843 and Pachymerium Koch, 1847 for two well-established genera of centipedes is conserved by setting aside type species fixations before the designation by Pocock (1898) of Mecistocephalus punctifrons Newport, 1843, as the type species of Mecistocephalus.

The holotype of Geophilus holstii Pocock, 1895 (currently Arrup holstii), a centipede from Japan, is unidentifiable, thus with this ruling it is replaced by a neotype.

The specific names Hemerobius elegans Stephens, 1836 (currently Sympherobius elegans), for a European brown lacewing (hemerobiidae) and Hemerobius elegans Guérin-Méneville, 1844 (currently Vieira elegans), for a Neotropical green lacewing (chrysopidae) are hereby conserved by ruling that Hemerobius elegans Guérin-Méneville, 1844 is not invalid by reason of being a junior primary homonym of Hemerobius elegans Stephens, 1836. Both names are in current use but are placed in different families and unlikely to ever be treated as congeneric in the future.

The specific name Buprestis angustula Illiger, 1803 (currently Agrilus angustulus) for a widely distributed species of jewel beetle (family buprestidae) has been given precedence over its unused senior synonym Agrilus pavidus (Fabricius, 1793).

The Commission has ruled that the stem of the genus Trachys is Trache-, and the name Trachys Fabricius, 1801 should be treated as of masculine gender. The family name trachisidae Laporte, 1835 is ruled to be an incorrect original spelling and is placed on the Official Index of Rejected and Invalid Family-Group Names in Zoology. The family-group names trachyini Gavoy, 1901, trachydini Reitter, 1911, trachyni Kerremans, 1893 and trachynini Kraatz, 1869 are placed on the Official Index of Rejected and Invalid Family-Group Names in Zoology as incorrectly derived from Trachys Fabricius, 1801.

The widely used family-group name Dendrobatidae Cope, 1865 (1850) is conserved by giving it precedence over the senior synonym phyllobatidae Fitzinger, 1843 whenever the two are considered synonyms. As a further protection of the family name of this group of Neotropical frogs, the generic name Hysaplesia Boie in Schlegel, 1826, considered by some authors as a senior synonym of the generic name Dendrobates Wagler, 1830, is hereby suppressed.