Okenia longiductis

Okenia longiductis Pola, Paz-Sedano, Macali, Minchin, Marchini, Vitale, Licchelli & Crocetta, 2019

Okenia longiductis by Enrico Ricchitelli

Taxonomy
 

Superdomain

Biota  

 

Kingdom

Animalia  

 

Phylum

Mollusca  

 

Class

Gastropoda  

 

Subclass

Heterobranchia  

 

Infraclass

Euthyneura  

 

Subterclass

Ringipleura  

 

Superorder

Nudipleura  

 

Order

Nudibranchia  

 

Suborder

Doridina  

 

Infraorder

Doridoidei  

 

Superfamily

Onchidoridoidea  

 

Family

Goniodorididae  

 

Genus

Okenia  

 

Species

Okenia longiductis  Pola, Paz-Sedano, Macali, Minchin, Marchini, Vitale, Licchelli & Crocetta, 2019

 
 Classification according to Bouchet et al. (2017)
Taxonomic source: World Register of Marine Species (AphiaID: 1343364).
Description
It can reach up to 10 mm in length. It has an elongated semi-transparent whitish body, so the grayish internal organs can be seen by transparency. The body is covered with small brown spots or scores, of different sizes and density depending on the specimen. Rhinophores are pigmented brown at the base, and are long and thick, with only 4-5 lamellae at the distal end. There are elongated papillae with brown and white spots in the center of the dorsum and around the entire mantle, even in front of the rhinophores and behind the gill. The gill is formed by 7-8 tripinnate leaves surrounding the anus, also with brown spots. The foot is pointed at the tail, of the same color and with the same spots as the rest of the body.

Biology
It lives associated with colonies of the gymnolemate bryozoan Amathia verticillata, on which it feeds and on which it lays the spawn, shaped like a cord with white eggs, arranged forming a circle. Until its recent description this species was reported in the Mediterranean as Okenia zoobotryon.

Etymology

  • Okenia. Dedicated to Prof. Dr. Ludwig Gilbert Lorenz Oken, (1779-1851), German natural philosopher, who was editor of the natural history journal “Isis” and published the well-known “Lehrbuch der Naturgeschichte” (Natural History Textbook). It’s nomenclature is not binominal, so the names in volume 3 (the zoology part) are unavailable for nomenclatural use.
  • Longiductis. Due to its long reproductive ducts.

Distribution
So far it has only been found in the Adriatic Sea, along the Italian shores and in the Catalan coast, where it has been observed in the Coves of Cala Maset in Sant Feliu de Guíxols and in the bath area of the Forum of Barcelona.

Known georeferenced records of the species: Okenia longiductis
Sources:
: OBIS
: GROC 2010-2011
: Enric Madrenas
: João Pedro Silva
: Bernard Picton
: GBIF.ORG
: OPK
: VIMAR
: Manuel Ballesteros.
: M@re Nostrum
: Altres fonts
: Marine Regions

Abundance

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

This chart displays the monthly observation probability for Okenia longiductis based on our own records.

More pictures

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Bibliography

    Ortea, J., L. Moro, and J. Espinosa. 2009. El género Okenia Menke, 1830 (Mollusca: Nudibranchia) en las islas Canarias con notas sobre Okenia zoobotryon (Smallwood, 1910) una especie en controversia permanente. Vieraea 37: 75-83.
    Pola, M. 2015. The Identity of Okenia zoobotryon (Smallwood, 1910) (Nudibranchia: Goniodorididae): Redescription and Proposed Designation of a Neotype. American Malacological Bulletin, 33(1):1-6.
    Pola, M., S. Paz-Sedano, A. Macali, D. Minchin, A. Marchini, F. Vitale, C. Licchelli, and F. Crocetta. 2019. What is really out there? Review of the genus Okenia Menke, 1830 (Nudibranchia: Goniodorididae) in the Mediterranean Sea with description of two new species. PLoS ONE 14(5): e0215037.

    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 (2012-2019) "Okenia longiductis" in OPK-Opistobranquis, Published: 27/10/2019, Accessed: 14/11/2019 at (https://opistobranquis.info/en/hgZ66)

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