Berthella stellata

Berthella stellata (Risso, 1826)

Berthella stellata by Enric Madrenas

Taxonomy
 

Superdomain

Biota  

 

Kingdom

Animalia  

 

Phylum

Mollusca  

 

Class

Gastropoda  

 

Subclass

Heterobranchia  

 

Infraclass

Euthyneura  

 

Subterclass

Ringipleura  

 

Superorder

Nudipleura  

 

Order

Pleurobranchida  

 

Superfamily

Pleurobranchoidea  

 

Family

Pleurobranchidae  

 

Genus

Berthella  

 

Species

Berthella stellata  (Risso, 1826)

 
 Classification according to Bouchet et al. (2017)
Taxonomic source: World Register of Marine Species (AphiaID: 140814).
Synonyms

  • Berthella albocrossata Heller & Thompson T., 1983 
  • Berthella postrema Burn, 1962
  • Berthella stellata albocrossata Heller & Thompson, 1983
  • Berthella tupala Er. Marcus, 1957
  • Pleurobranchus pellucidus Pease, 1860
  • Pleurobranchus stellatus Risso, 1826 (original)

Description
This is a species that can reach up to 30 mm in length. In large specimens the mantle is very flat, with a rounded contour and that completely covers the foot. The main feature of this species is the whitish “Y” shaped spot on the back, that could be somewhat irregular. The coloration of this species is very variable but the most widespread large specimens usually show different shades of brown with small irregular whitish spots. Smaller specimens can be whitish, yellowish or reddish. This coloration is due to the many color spots embedded in the mantle. The Y-shaped stain can be absent in bigger specimens. The inner shell is not seen by transparency below the mantle. The cephalic veil is colored light brown, as are the rhinophores, gill and hiponotum, and the underside of the foot is whitish. The gill is bipinnate and has up to 19 slides to either side of the spine.

Biology
In the Catalan coast appears frequently at shallow depth (20-30 cm), under rocks with abundant colonial tunicates that can be its food. In the breeding season it is common to see groups of multiple specimens (up to 10-12 in Es Caials) copulating and laying eggs. The spawn is a gelatinous spiral ribbon of about two turns, with numerous little white eggs. This species also has glands in the foot that expel a very acidic secretion (pH 0-1) for defensive purposes.

Etymology

  • Berthella. Probably dedicated to Sabin Berthelot (1794-1880), a French naturalyst who enrolled the Navy and participated in the Napoleonic wars. He lived part of his life at the Canary islands, in his post as French consul in Tenerife. The abbreviation “Berth” is used to indicate Sabin Berthelot as an authority in the scientific botanical description and classification. He wrote the “Historia Natural de Canarias” and directed the Botanical Garden of Puerto de la Cruz.
  • Stellata. From Latin stellatus meaning starred”, “with a star”.

 Distribution
This Mediterranean species seems to have a circumtropical distribution.

Known georeferenced records of the species: Berthella stellata
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: Berthella stellata

    Cantabria: Ortea (1977c, as B. plumula), Ávila Escartín (1993). Galicia: Fernández-Ovies (1981, as B. plumula). Portugal: García-Gómez et al. (1991), Calado et al. (1999, 2003). Andalucía (Atl.): Cervera and García-Gómez (1986), Cervera et al. (2000). Gibraltar: Cervera and García-Gómez (1986), García-Gómez (1987), García-Gómez et al. (1989), Cervera et al. (2000). Andalucía (Med.): García Raso et al. (1992), Sánchez Tocino, Ocaña and García (2000a). Levante: Ballesteros et al. (1986), Templado (1982b), Marín and Ros (1987a), Templado et al. (2002). Catalunya: Domènech et al. (2002), Ballesteros (datos no publicados) [Es Caials, Cap Falcó de Roses], M@re Nostrum [La Foradada de Portbou 10/2001]. Baleares: Ros and Gili (1985, as B. cf. stellata), Ballesteros, Álvarez and Mateo (1986). Canarias: Malaquias and Calado (1997), Ortea et al. (2001), Wirtz and Debelius (2003). Madeira: Malaquias (unpubl. data). Azores: Wirtz and Debelius (2003).

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

Abundance

    Western Mediterranean:2 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 Berthella stellata based on our own records.

More pictures


Bibliography

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Further reading

Cite this article as:

Ballesteros, Manuel, Enric Madrenas, Miquel Pontes (2012-2019) "Berthella stellata" in OPK-Opistobranquis, Published: 15/05/2012, Accessed: 23/09/2019 at (https://opistobranquis.info/en/EnzSO)

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