Atagema gibba

Atagema gibba  Pruvot-Fol, 1951

Atagema gibba First British record, Porthkerris, Cornwall. 24.11.1973 by Bernard Picton

Class: Gastropoda  Cuvier, 1797
Subclass: Heterobranchia  J.E. Gray, 1840
Clade: Euthyneura  Spengel, 1881
Clade: Nudipleura  Wägele & Willan, 2000
Order: Nudibranchia  Cuvier, 1817
Suborder: Euctenidiacea  Tardy, 1970
Infraorder: Doridacea  Thiele, 1931
Superfamily: Doridoidea  Rafinesque, 1815
Family: Discodorididae  Bergh, 1891
Genus: Atagema  M.E. Gray, 1850
Species: Atagema gibba  Pruvot-Fol, 1951




  • Gibba. From Latin, hunch, because of the protuberance that runs along its dorsum and that differentiates it from other species. Colloquially it is called a “dromedary sea slug”.

There are very few reports of this species since its description in 1951: two in the England’s South West, one in the western Mediterranean (Sea Slug Forum), two specimens in the island of Sálvora (Ria de Arosa, Galicia, Spain) and numerous specimens in the island Rúa (Ria de Arosa, Galicia, Spain) in what looks like a stable population in the area (GEMM).

Known georeferenced records of the species: Atagema gibba
: GROC 2010-2011
: Enric Madrenas
: João Pedro Silva
: Bernard Picton
: Manuel Ballesteros.
: M@re Nostrum
: Altres fonts
: Marine Regions

References for the species: Atagema gibba

    General: Brown & Picton, 1979:17; Gosliner, 1987b:63[P]; Nordsieck, 1972:60; Picton & Morrow, 1994:84[P]; Pruvot-Fol, 1954b:239; Thompson, 1988:228; Thompson & Brown, 1974:233; 1976:131; 1984:85[P]

    Sources: Cervera et al., 2004, Ballesteros, 2007 & 2016, McDonald, 2006 and other sources.


    Western Mediterranean:
    Eastern Mediterranean:
    Atlantic Ocean:
This chart displays the observation probability for Atagema gibba based on our own records.

More pictures


Further reading

Cite this article as:

Ballesteros, Manuel, Enric Madrenas, Miquel Pontes et al. (2012-2017) "Atagema gibba" in OPK-Opistobranquis, Published: 18/09/2014, Accessed: 18/12/2017 at (

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