Doto alidrisi

Doto alidrisi  Ortea, Moro & Ocaña, 2010

Doto alidrisi @ Ceuta, Spain 24-04-2010 by Leopoldo Moro Abad

Class: Gastropoda  Cuvier, 1797
Subclass: Heterobranchia  J.E. Gray, 1840
Clade: Euthyneura  Spengel, 1881
Clade: Nudipleura  Wägele & Willan, 2000
Order: Nudibranchia  Cuvier, 1817
Suborder: Dexiarchia  Schrödl, Wägele & Willan, 2001
Infraorder: Cladobranchia Willan and Morton, 1984
Parvorder: [unassigned] Cladobranchia Willan & Morton, 1984
Family: Dotidae  J.E. Gray, 1853
Genus: Doto  Oken, 1815
Species: Doto alidrisi  Ortea, Moro & Ocaña, 2010

With a maximum reported size of 11 mm, it has an elongated, translucent white coloured body, finishing in a triangular tail. There is a dorsal band formed by reddish spots (of a more intense hue in small specimens than in larger ones) that starts in the front part of the head and reaches the height of the last pair of ceratas, without reaching the tail, which has some white dots but no reddish spots. Bands of reddish dots also cover the flanks, below the ceratal insertion line. In the middle part of the body the reddish dorsal band connects with the lateral ones. The head has a translucent white veil with several opaque white dots and some reddish dots, a convex shape and cornered by lateral lobes, more elongated as the size of the animal increases. The internal organs, cream-colored, are visible by transparency, especially in larger specimens. The rhinophores are smooth and relatively long, translucent white coloured, covered with opaque white spots along their entire length; they come out of rhinophoric sheaths that are not cylindrical but slightly narrow in their middle part, reminding an hourglass, they are also translucent white with white dots around the edge of the sheath and with red dots at their base internal side. In front of the rhinophores there could be a small tubercle stained in opaque white. The most characteristic trait of this species is the shape and color of its ceratas. All the studied specimens presented 5 pairs of ceratas. The first pair of ceratas appears relatively close to the rhinophores, at a closer distance than it separates them from the second pair of ceratas. The central stem of each cerata is narrow, of tubular form, widened in its middle part and with a thin end, of a length equivalent to a third of the total length of the cerata, topped by a small distal bulb. The base of the cerata, with reddish spots on the base, especially in young specimens, has a series of 3-5 relatively long tubercles inserted perpendicular to the line of the cerata on the anterior, posterior and exterior sides, while on the interior side they are are more reduced; all the tubercles are topped by small distal bulbs and have white granules inside, which are separated from the cream-colored digestive gland that fills the central body of the cerata. On the right side of the body, between the rhinophoric sheath and the first cerata we find the genital pore. A little further back, between the first and second cerata, we find the anal papilla, globular and with an opaque white spot in the center.

It feeds on hydrarians, although these are not identified in the description of the species. The spawn is a wavy ribbon, deposited on its food, whose loops turn onto themselves and are grouped forming a ball; it contains white or pinkish coloured eggs that are arranged inside forming 7-8 rows at the top of the ribbon. The general shape of the animal makes it look like Doto coronata, from which it is separated by the characteristic shape of the ceratas, the rhinophoric sheaths narrowed in its middle part and the elongated oral lobes.


  • Doto. Name of a Nereid, a sea nymph in Greek mythology.
  • Alidrisi. In honor of the famous Hispanic-muslim cartographer, geographer and traveler, Al Idrisi, born in Ceuta (1100-1165) in the heart of a noble family of Spanish origin. Author of what he called “The Book of Roger”, a geography in which the world has divided into seven climatic regions, outstanding a large inverse world map or Tabula Rogeriana.

This species has only been reported from waters of Ceuta (Spain).

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

References for the species: Doto alidrisi


    Western Mediterranean:
    Eastern Mediterranean:
    Atlantic Ocean:

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Further reading

Cite this article as:

Pontes, Miquel, Manuel Ballesteros, Enric Madrenas (2012-2018) "Doto alidrisi" in OPK-Opistobranquis, Published: 06/10/2014, Accessed: 17/11/2018 at (

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