Atagema alba

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Hunchback doris
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
(unranked): clade Heterobranchia
clade Euthyneura
clade Nudipleura
clade Nudibranchia
Superfamily: Doridoidea
Family: Discodorididae
Genus: Atagema
Species: A. alba
Binomial name
Atagema alba
(O'Donoghue, 1927)[1]

Glossodoridiformia alba O'Donoghue, 1927
Atagema quadrimaculata Collier, 1963
Petelodoris spongicola MacFarland, 1966

Atagema alba, common name the hunchback doris, is a species of sea slug or dorid nudibranch, a marine gastropod mollusk in the family Discodorididae.[3][2]


This species has been reported from Monterey Bay, California, USA south to Ensenada, Baja California, Mexico.[4]



This dorid nudibranch feeds on sponges.


  1. ^ O'Donoghue, C. H. (1927). Notes on a collection of nudibranchs from Laguna Beach, California. Journal of Entomology & Zoology, Pomona College 19(1-4):77-119, pls. 1-3.
  2. ^ a b Bertsch H. & Gosliner T.M. (1986) Anatomy, distribution, synonymy, and systematic relationships of Atagema alba (O'Donoghue, 1927) (Nudibranchia: Doridacea). The Veliger 29(1): 123-128.
  3. ^ Bouchet, P. (2015). Atagema alba (O'Donoghue, 1927). In: MolluscaBase (2015). Accessed through: World Register of Marine Species on 2016-10-24.
  4. ^ Behrens, D. (2005). Atagema alba The Slug Site.