Halgerda Guahan

''Halgerda'' is a genus of sea slugs, dorid nudibranchs, shell-less marine (ocean), marine gastropod mollusks in the family Discodorididae.

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 the Gastropoda (Bouchet & Rocroi, 2005), 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

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:MolluscaBase eds. (2023). MolluscaBase
''Halgerda'' Bergh, 1880
Accessed through: World Register of Marine Species on 2023-06-18.

Image:Halgerda batangas.jpg, ''Halgerda batangas''
Image:Halgerda brunneomaculata.jpg, ''Halgerda brunneomaculata''
Image:Halgerda carlsoni.jpg, ''Halgerda carlsoni''
Image:Halgerda formosa.jpg, ''Halgerda formosa''
Image:Halgerda guahan 2.jpg, ''Halgerda guahan''
Image:Halgerda indotesselata B12 4392a.jpg, ''Halgerda indotesselata''
Image:Halgerda malesso 2.jpg, ''Halgerda malesso''
Image:Halgerda-punctata.jpg, ''Halgerda punctata''
Image:Halgerda stricklandi 003.jpg, ''Halgerda stricklandi''
Image:Halgerda terramtuentis.jpg, ''Halgerda terramtuentis''
Image:Nudibranch - Halgerda tessellata.jpg, ''Halgerda tessellata''
Image:Halgerda wasinensis.jpg, ''Halgerda wasinensis''
Image:Halgerda willeyi 2.jpg, ''Halgerda willeyi''

References

{{Taxonbar, from=Q1443205

Discodorididae