''Halgerda'' is a

genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of living and fossil organisms as well as viruses. In the hierarchy of biological classification, genus comes above species and below family. In binomial n ...

sea slug Sea slug is a common name for some marine invertebrates with varying levels of resemblance to terrestrial slugs. Most creatures known as sea slugs are gastropods, i.e. they are sea snails (marine gastropod mollusks) that over evolutionary ...

s, dorid

nudibranch Nudibranchs () are a group of soft-bodied marine gastropod molluscs which shed their shells after their larval stage. They are noted for their often extraordinary colours and striking forms, and they have been given colourful nicknames to mat ...

s, shell-less

marine Marine is an adjective meaning of or pertaining to the sea or ocean. Marine or marines may refer to: Ocean * Maritime (disambiguation) * Marine art * Marine biology * Marine debris * Marine habitats * Marine life * Marine pollution Military * ...

gastropod

mollusk Mollusca is the second-largest phylum of invertebrate animals after the Arthropoda, the members of which are known as molluscs or mollusks (). Around 85,000 extant species of molluscs are recognized. The number of fossil species is es ...

s in the family

Discodorididae Discodorididae is a taxonomic family of sea slugs, specifically dorid nudibranchs, marine gastropod mollusks in the superfamily Doridoidea.Bouchet, P. (2011). Discodorididae. Accessed through: World Register of Marine Species at http://www.ma ...

Taxonomy

The genus ''Halgerda'' was classified within the family Halgerdidae by Odhner (1934). Halgerdidae Odhner, 1926, is treated as a synonym of Discodorididae in the taxonomy of Bouchet & Rocroi (2005). See also Valdés (2002). Seven species of ''Halgerda'' were described in the years 1880-1905, two species in 1932-1949, four species from 1975-1982, then 22 species in the years 1993-2001. In 2018 another six new species were described from Mozambique, highlighting the number of undescribed species on the African coast of the Indian Ocean.Tibiriçá, Y.; Pola, M.; Cervera, J. L. (2018). Systematics of the genus ''Halgerda'' Bergh, 1880 (Heterobranchia : Nudibranchia) of Mozambique with descriptions of six new species. Invertebrate Systematics. A number of undescribed species are known and many species show considerable variation across their ranges, which may indicate that more cryptic species exist.Gosliner, T.M., Behrens,D.W. & Valdes,A., 2008. Indo-Pacific Nudibranchs and Sea Slugs. A field guide to the World's most diverse fauna. Sea Challengers Natural History Books & The California Academy of Sciences.

Distribution

All species of ''Halgerda'' are confined to the Indo-West Pacific Tropical region apart from two species which are found in warm temperate waters of South Africa and Southern Australia and one species from warm temperate Japanese waters.

Species

Species within the genus ''Halgerda'' include:Bouchet, P.; Gofas, S. (2014). ''Halgerda'' Bergh, 1880. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=205320 on 2015-01-25 * '' Halgerda abyssicola'' Fahey & Gosliner, 2000 * ''

Halgerda albocristata ''Halgerda albocristata'' is a species of sea slug, a dorid nudibranch, a shell-less marine gastropod mollusk in the family Discodorididae. Distribution The holotype of this species was collected at Bonito Island, Batangas, Philippines. Addit ...

'' Fahey & Gosliner, 1999 * '' Halgerda aurantiomaculata'' (Allan, 1932) * '' Halgerda azteca'' Fahey & Gosliner, 2000 * '' Halgerda bacalusia'' Fahey & Gosliner, 1999 * ''

Halgerda batangas ''Halgerda batangas'' is a species of sea slug, a dorid nudibranch, a shell-less marine gastropod mollusk in the family Discodorididae. Distribution This species was described from the Philippines, with a holotype specimen measuring 40 ...

'' Carlson & Hoff, 2000 * ''

Halgerda brunneomaculata ''Halgerda brunneomaculata'' is a species of sea slug, a dorid nudibranch, shell-less marine gastropod mollusks in the family Discodorididae. Distribution This species was described from Guam, Mariana Islands. It has subsequently been reported ...

'' Carlson & Hoff, 1993 * ''

Halgerda brycei ''Halgerda brycei'' is a species of sea slug, a dorid nudibranch, shell-less marine (ocean), marine gastropod mollusks in the family Discodorididae. Distribution This species was described from Western Australia.Rudman, W.B., 2001 (October 10''H ...

'' Fahey & Gosliner, 2001 * ''

Halgerda carlsoni ''Halgerda carlsoni'' is a species of sea slug, a dorid nudibranch, shell-less marine gastropod mollusks in the family Discodorididae.Dayrat B. 2010 ''A monographic revision of discodorid sea slugs (Gastropoda, Opisthobranchia, Nudibranchia, Do ...

'' Rudman, 1978 * ''

Halgerda dalanghita ''Halgerda dalanghita'' is a species of sea slug, a dorid nudibranch, shell-less marine gastropod mollusks in the family Discodorididae. Distribution The holotype of ''Halgerda dalanghita'' was collected at Maricaban Island, Luzon, Philippines ...

'' Fahey & Gosliner, 1999 * ''

Halgerda diaphana ''Halgerda diaphana'' is a species of sea slug, a dorid nudibranch, shell-less marine gastropod mollusks in the family Discodorididae. Distribution This species was originally described from numerous specimens collected in Okinawa Island, Japa ...

'' Fahey & Gosliner, 1999 * ''

Halgerda dichromis ''Halgerda dichromis'' is a species of sea slug, a dorid nudibranch, shell-less marine gastropod mollusks in the family Discodorididae. Distribution This species was described from a single specimen collected in Durban Harbour, South Africa. I ...

'' Fahey & Gosliner, 1999 * '' Halgerda elegans'' Bergh, 1905 * '' Halgerda fibra'' Fahey & Gosliner, 2000 * '' Halgerda formosa'' Bergh, 1880 * ''

Halgerda graphica ''Halgerda graphica'' is a species of sea slug, a dorid nudibranch, shell-less marine gastropod mollusks in the family Discodorididae. Distribution This species was described from Kangaroo Island, South Australia. It has also been reported f ...

'' Basedow & Hedley, 1905 * ''

Halgerda guahan ''Halgerda guahan'' is a species of sea slug, a dorid nudibranch, a shell-less marine gastropod mollusk in the family Discodorididae.Bouchet P. & Rocroi J.-P. (Ed.); Frýda J., Hausdorf B., Ponder W., Valdes A. & Warén A. 2005. ''Classificatio ...

'' Carlson & Hoff, 1993 * ''

Halgerda gunnessi ''Halgerda gunnessi'' is a species of sea slug, a dorid nudibranch, a shell-less marine gastropod mollusk Mollusca is the second-largest phylum of invertebrate animals after the Arthropoda, the members of which are known as molluscs or ...

'' Fahey & Gosliner, 2001 * ''

Halgerda indotessellata ''Halgerda indotessellata'' is a species of sea slug, a dorid nudibranch, a shell-less marine gastropod mollusk in the family Discodorididae.WoRM''Halgerda indotessellata'' Tibiriçá, Pola & Cervera, 2018.Accessed on 2019-06-15. Distribution ...

'' Tibiriçá, Pola & Cervera, 2018 * '' Halgerda jennyae'' Tibiriçá, Pola & Cervera, 2018 *'' Halgerda johnsonorum'' Carlson & Hoff, 2000 * '' Halgerda leopardalis'' Tibiriçá, Pola & Cervera, 2018 * ''

Halgerda malesso ''Halgerda malesso'' is a species of sea slug, a dorid nudibranch, shell-less marine (ocean), marine gastropod mollusc in the family Discodorididae.Bouchet P. & Rocroi J.-P. (Ed.); Frýda J., Hausdorf B., Ponder W., Valdes A. & Warén A. 2005. '' ...

'' Carlson & Hoff, 1993 * '' Halgerda maricola'' Fahey & Gosliner, 2001 * '' Halgerda meringuecitrea'' Tibiriçá, Pola & Cervera, 2018 * '' Halgerda mozambiquensis'' Tibiriçá, Pola & Cervera, 2018 * '' Halgerda nuarrensis'' Tibiriçá, Pola & Cervera, 2018 * '' Halgerda okinawa'' Carlson & Hoff, 2000 * '' Halgerda onna'' Fahey & Gosliner, 2001 * '' Halgerda orstomi'' Fahey & Gosliner, 2000 *'' Halgerda paliensis'' (Bertsch & Johnson, 1982) * '' Halgerda punctata'' Farran, 1902 * '' Halgerda rubicunda'' Baba, 1949 * ''

Halgerda stricklandi ''Halgerda stricklandi'' is a species of sea slug, a dorid nudibranch, a shell-less marine gastropod mollusk in the family Discodorididae.WoRMS (2014). Halgerda stricklandi Fahey & Gosliner, 1999. Accessed through: World Register of Marine Spec ...

'' Fahey & Gosliner, 1999 * '' Halgerda terramtuentis'' Bertsch & Johnson, 1982 * '' Halgerda tessellata'' (Bergh, 1880) - originally as ''Dictyodoris tessellata'' Bergh, 1880 * '' Halgerda theobroma'' Fahey & Gosliner, 2001 * ''

Halgerda toliara ''Halgerda toliara'' is a species of sea slug, a dorid nudibranch, shell-less marine gastropod The gastropods (), commonly known as snails and slugs, belong to a large taxonomic class of invertebrates within the phylum Mollusca called Gast ...

'' Fahey & Gosliner, 1999 * '' Halgerda wasinensis'' Eliot, 1904 * ''

Halgerda willeyi ''Halgerda willeyi'' is a species of sea slug. It is a dorid nudibranch, a shell-less marine gastropod mollusk in the family Discodorididae. Distribution This species was described from a single specimen collected at Lifou, Loyalty Islan ...

'' Eliot, 1904 *'' Halgerda xishaensis'' Lin, 1975 Image:Halgerda batangas.jpg, ''

'' Image:Halgerda brunneomaculata.jpg, ''

'' Image:Halgerda carlsoni.jpg, ''

'' Image:Halgerda formosa.jpg, '' Halgerda formosa'' Image:Halgerda guahan 2.jpg, ''

'' Image:Halgerda indotesselata B12 4392a.jpg, '' Halgerda indotesselata'' Image:Halgerda malesso 2.jpg, ''

'' Image:Halgerda-punctata.jpg, '' Halgerda punctata'' Image:Halgerda stricklandi 003.jpg, ''

'' Image:Halgerda terramtuentis.jpg, '' Halgerda terramtuentis'' Image:Nudibranch - Halgerda tessellata.jpg, '' Halgerda tessellata'' Image:Halgerda wasinensis.jpg, '' Halgerda wasinensis'' Image:Halgerda willeyi 2.jpg, ''

References

{{Taxonbar, from=Q1443205 Discodorididae