Geitodoris portmanni

Geitodoris portmanni  (Schmekel, 1972)

Geitodoris portmanni by Enric Madrenas













































Geitodoris portmanni  (Schmekel, 1972)

 Classification according to Bouchet et al. (2017)
Taxonomic source: World Register of Marine Species (AphiaID: 139581).

  • Carryodoris portmanni Schmekel, 1972

This is a doridacean with a very flattened body and a leathery and spongy texture, reaching 15-20 mm in length. Its color ranges from bright yellowish, dull yellow or even slightly reddish, the middle of the dorsum could be somewhat darker because of the internal viscera. On the dorsum there can be small whitish scores on the tips of some tubercles. There may also be small brown spots at the glandular openings. The mantle is wide and there are numerous, well spaced, small conical tubercles with rounded apex on the dorsum. The spongy texture of the back of the animal is because of a fine grid of light-colored spicules that seem to converge in tubercles in a starry way; binocular microscope allows to see that the stellate reticulum also invades the tubers, converging towards their apexes. The rhinophores base color is pale, the base is yellowish and the laminar portion (with 14-15 lamellae) scattered with brown grains, their apex is mace-shaped and white. The rhinophores are spiculous. The rhinophoric sheath is high and its upper edge has about 11-15 somewhat irregular whitish tubercles that fold together when the rhinophores are fully retracted, closing the sheath orifice. The gill consists of about 6 yellowish tripinnate leaves with brown spots on the central rachis. Gill sheath is rather high and its upper edge is scalloped. The gill leaves head backwards when extended. The foot is yellow and without spots while the sides of the body have very thin brown markings. The foot is lined and cleft on the anterior side and the oral tentacles are well developed.

Very little is known of this rare species of nudibranch, it is commonly found below stones from a few meters of water down to 40 m (Schmekel & Portmann, 1982). It has also been reported on the Bryopsis algae at 27 m deep (Marin & ros, 1987).


  • Geitodoris. From Greek “geitonos”, neighbor (meaning close or similar) + “Doris”, in Greek mythology, the wife of Nereus, a sea nymph and mother of the Nereids.
  • Portmanni. Dedicated to the Swiss zoologist Prof. Adolf Portmann, (1897-1982), who worked on Mediterranean nudibranchs, coauthor of the book “Opisthobranchia des Mittelmeeres”.

There are very few known reports of this rare species. Originally described by Marechiaro in the Gulf of Naples, it has only been found in the Mediterranean coast of the Iberian Peninsula (Cervera et al. 2004). In Catalonia it has been observed in a few locations of the Costa Brava: L’Estartit, L’Escala, El Port de la Selva or Cadaqués.

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


    Western Mediterranean:1 out of 5 stars
    Eastern Mediterranean:0 out of 5 stars
    Atlantic Ocean:0 out of 5 stars

This chart displays the monthly observation probability for Geitodoris portmanni based on our own records.

More pictures


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    Ballesteros, M., E. Madrenas, and M. Pontes. 2021. OPK - Opistobranquis. (
    Ballesteros, M., E. Madrenas, and M. Pontes. 2016. Actualización del catálogo de los moluscos opistobranquios (Gastropoda: Heterobranchia) de las costas catalanas. Spira 6(2016): 1-28.
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    Bibliography based on the works by Steve Long, 2006. Bibliography of Opisthobranchia 1554-2000 and Gary McDonald, 2009. Bibliographia Nudibranchia, with later updates from other resources.

Further reading

Cite this article as:

Ballesteros, Manuel, Enric Madrenas, Miquel Pontes (2021) "Geitodoris portmanni" in OPK-Opistobranquis. Published: 11/09/2014. Accessed: 19/01/2021. Available at (

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