Atalodoris oblonga

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

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. 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.

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.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.

Atalodoris oblonga

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