Elysia gordanae

Elysia gordanae (Thompson & Jaklin, 1988)

Elysia gordanae by Enric Madrenas

Taxonomy
 

Superdomain

Biota  

 

Kingdom

Animalia  

 

Phylum

Mollusca  

 

Class

Gastropoda  

 

Subclass

Heterobranchia  

 

Infraclass

Euthyneura  

 

Subterclass

Tectipleura  

 

Superorder

Sacoglossa  

 

Superfamily

Plakobranchoidea  

 

Family

Plakobranchidae  

 

Genus

Elysia  

 

Species

Elysia margaritae   Fez, 1962

 
 Classification according to Bouchet et al. (2017)
Taxonomic source: World Register of Marine Species (AphiaID: 182791).
Taxonomic note: Ortea et al. (2017) say that Thompson & Jaklin (1988) wrongly synonymised E. margaritae with E. timida. But it is questionable the synonymy Ortea et al. proposed between E. gordanae and E. margaritae because of a huge difference in size: E. margaritae was described on the basis of few specimens 33-44 mm long, while E. gordanae is much smaller and usually its size is less than 10 mm. On the other hand, there is another taxon, Elysia hetta Perrone, 1990, that is closely related to E. gordanae and currently accepted as valid by WoRMS. It is very probable that E.hetta‘s description was based on juveniles of E. gordanae, so it could be a junior synonym of that species. (text based on Jakov Prkić, pers.comm.)

Description
Specimens of this species can grow up to 30 mm in length. The general color is greenish but it is not homogeneous, and there are usually numerous white and pink scores and granulations that lightens the hue of the body. On both sides of the head there are very faintly pigmented iridescent blue areas. The rhinophores are narrow, are rolled and are relatively short; their color is greenish and they are sprayed with white spots. The eyes are very visible right behind the rhinophores base. The parapodia are underdeveloped and use to open in angle in its anterior third. The edge of the parapodia is thickened and edged with a darker green with small whitish bumps. The dorsal vessels are very inconspicuous.

Biology
This species usually lives among green algae from the intertidal zone to down to 30 m depth. This species has been found on algae and Bryopsis and Derbesia noted that feeds the algae Cladophora chlorophycean and is able to retain their chloroplasts in his body, with a high turnover rate (Marín & Ros, 1988). The setting is a thick whitish cord wound in a spiral ondulosa (Gofas, Moreno & Salas, 2011).

Etymology

  • Elysia. It is a girl’s name of Latin origin, derived from the word Elysium, which in mythology is the home of the blessed, known as the “Elysian fields”. The name Elysia also means “God’s oath” in Hebrew. Frieder Sauer comments that Elysia means heavenly.
  • Gordanae. In honour of Gordana Jaklin (19??-) likely related to one of the authors.

Distribution
In addition to the type locality on the coast of Slovenia, the species has been cited only in the Iberian Peninsula (Andalusian coast, Levantine and Catalan), Canary Islands, Azores (Cervera et al. 2004) and Balearic Islands (Menorca). In Catalonia, it has been observed in Es Caials, L’Escala and the Medes Islands.

Known georeferenced records of the species: Elysia gordanae
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

References for the species: Elysia gordanae

    Andalucía (Atl.): Cervera and López-González (1996). Andalucía (Med.): García Raso et al. (1992). Canarias: Ortea et al. (1998, 2001, 2003, all as E. margaritae), Moro et al. (2003, as E. margaritae), Wirtz and Debelius (2003, as E. margaritae). Azores: Wirtz and Debelius (2003, as E. margaritae).

    Sources: Cervera et al., 2004, Ballesteros, 2007 & 2016, McDonald, 2006 and other sources.

Abundance

    Western Mediterranean:
    Eastern Mediterranean:
    Atlantic Ocean:

More pictures

Bibliography

Further reading

Cite this article as:

Ballesteros, Manuel, Enric Madrenas, Miquel Pontes (2012-2018) "Elysia gordanae" in OPK-Opistobranquis, Published: 14/05/2012, Accessed: 14/11/2018 at (https://opistobranquis.info/en/IiP74)

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