Atalodoris oblonga

Atalodoris oblonga
The nudibranch Atalodoris oblonga, Gulen Dive Resort, Norway.
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Order:	Nudibranchia
Superfamily:	Onchidoridoidea
Family:	Onchidorididae
Genus:	Atalodoris
Species:	A. oblonga
Binomial name
Atalodoris oblonga (Alder & Hancock, 1845) [1]
Synonyms [2] [3]
Doris oblongaAlder & Hancock, 1845 Knoutsodonta oblonga(Alder & Hancock, 1845) superseded combination Onchidoris oblonga(Alder & Hancock, 1845)

Atalodoris oblonga is a species of sea slug, a dorid nudibranch, a shell-less marine gastropod mollusc in the family Onchidorididae. ^[2]

Description

(Original description) The body is rather convex, oblong-ovate, and tapers towards the rear. The cloak is pale straw-colored, freckled, and spotted with umber-brown. It is densely spiculose and covered with moderate-sized, nearly equal conical papillae.

The tentacles are rather thick and finely laminated, lacking sheaths. The branchial plumes are seven in number, shortish, and do not spread out much. They are surrounded by a circle of large tubercles.

The head has a large veil. The foot is somewhat narrow, straight, and slightly notched in the front, and it does not extend beyond the cloak at the rear. ^[4]

Distribution

This species was described from Berry Head, Torbay, Devon, England. It is currently known from Norway south to the Atlantic south coast of England. ^[5]

References

1. Alder, J., & A. Hancock (1845) Notice of a new genus and several new species of nudibranchiate Mollusca. Annals & Magazine of Natural History 16(106):311-316, page 314.
2. MolluscaBase eds. (2025). MolluscaBase. Atalodoris oblonga (Alder & Hancock, 1845). Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=1565339 on 2025-09-09
3. Hallas J.M. & Gosliner T.M. (2015). Family matters: The first molecular phylogeny of the Onchidorididae Gray, 1827 (Mollusca, Gastropoda, Nudibranchia). Molecular Phylogenetics and Evolution. 88: 16-27, page(s): 25
4. Alder, J., & A. Hancock (1845) Notice of a new genus and several new species of nudibranchiate Mollusca. Annals & Magazine of Natural History 16(106):311-316, page 314. This article incorporates text from this source, which is in the public domain .
5. Picton, B.E. & Morrow, C.C. (2015). Onchidoris oblonga (Alder & Hancock, 1845). [In] Encyclopedia of Marine Life of Britain and Ireland. Accessed on 2016-1-15.

• Ortea, J. (2021). Nueva especie del género Atalodoris Iredale & O'Donoghue, 1923 (Mollusca: Nudibranchia) colectada en la Concha de Artedo, Asturias, dedicada al periodista deportivo José María García. Revista de la Academia Canaria de Ciencias. 33: 97-106.