Tritonia lineata

Tritonia lineata Alder & Hancock, 1848

Tritonia lineata by Enric Madrenas

Taxonomy
 

Superdomain

Biota  

 

Kingdom

Animalia  

 

Phylum

Mollusca  

 

Class

Gastropoda  

 

Subclass

Heterobranchia  

 

Infraclass

Euthyneura  

 

Subterclass

Ringipleura  

 

Superorder

Nudipleura  

 

Order

Nudibranchia  

 

Suborder

Cladobranchia  

 

Superfamily

Tritonioidea  

 

Family

Tritoniidae  

 

Genus

Tritonia  

 

Species

Tritonia lineata  Alder & Hancock, 1848

 
 Classification according to Bouchet et al. (2017)
Taxonomic source: World Register of Marine Species (AphiaID: 141735).
Description
This nudibranch can reach more than 30 mm in length. The body is long and narrow, with a square section. The body colour is a slightly translucent whitish, revealing creamy coloured organs through the body integument. Two opaque white lines run along the margins of the dorsum and are inserted into the bases of the pallial processes and, deppending on the specimens, there may also be two parallel longitudinal lines crossing the center of the dorsum and having connections to the side lines near the pallial processes. The two white lines on the sides join ahead of the rhinophores in the head, and also in the back of the tail, which is long and sharp. The oral veil is not very developed and has 4 palps, the one on the center are the longest. The tip of the oral veil extensions is also coloured opaque white. The rhinophores have a thick main portion pigmented white while the lamellae are semitransparent and directed forward. The rhinophoric sheath is expanded and with a wavy upper edge. The eyes are on the rear base of the rhinophores. The margins of the dorsum have about 4 to 5 pallial semitransparent and slightly branched processes, with the central axis coloured opaque white; the last two of these pallial processes are very small and rudimentary. The foot is narrow and with a rounded front.

Biology
This species has been found living under stones or on rock walls with abundant algae, hydrarians and anthozoans. It is reported that it feeds on hydrozoan Kirchenpaueria pinnata and the stoloniferous octocorals Sarcodictyon catenatum and S. roseum (Bielecki, 2011). The spawn is a semitransparent ribbon wound in an spiral of about 4 turns with white eggs (Alder & Hancock, 1848).

Etymology

  • Tritonia. The genus Tritonia is dedicated to Triton, in Greek mythology the god of the sea, son of Poseidon and Amphitrite, portrayed as having the head and trunk of a man and the tail of a fish.
  • Lineata. From Latín “lineatus”, with lines, lined.

Distribution
This is an European species that, until recently, it was only known from Atlantic waters of northern Europe (British Isles, Norway). First observed for the Iberian Coast at L’Escala (Costa Brava) by Enric Madrenas (Ballesteros, 2007). Later on it has been located on the beach in Temperán (Ria de Vigo, Pontevedra) (Fernández, 2012 ), on the coast of Croatia (Sea Slug Forum) and the Medes Islands (Costa Brava, VIMAR Group).

Known georeferenced records of the species: Tritonia lineata
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:
    Eastern Mediterranean:
    Atlantic Ocean:

More pictures

Bibliography

Further reading

Cite this article as:

Ballesteros, Manuel, Enric Madrenas, Miquel Pontes (2012-2018) "Tritonia lineata" in OPK-Opistobranquis, Published: 16/05/2012, Accessed: 14/11/2018 at (https://opistobranquis.info/en/nSYkq)

In order to copy this cite or text fragments you must be a registered user.