Berthella plumula
Berthella plumula (Montagu, 1803)
Berthella plumula (Portugal) by João Pedro Silva
Synonyms
- Berthella porosa de Blainville, 1824
- Bulla plumula Montagu, 1803 (original)
- Cleanthus montagui Leach, 1852
- Lamellaria kleciachi Brusina, 1866
- Pleurobranchus brevifrons Philippi, 1844
- Pleurobranchus fleuriausi d’Orbigny, 1837
- Pleurobranchus perforatus Philippi, 1844
- Pleurobranchus plumula (Montagu)
- Sigaretus stomatellus Risso, 1826
Taxonomic note: Following the study by Ghanimi et al. (2020) of the Berthella stellata species complex, it turns out that the species known so far as Berthella plumula (Montagu, 1803) is actually a complex of two differentiated species; the name B. plumula is retained for specimens from the Atlantic, while the name Berthella perforata (Philippi, 1844) is proposed for specimens from the Mediterranean.
Description
This species can grow up to 35 mm. The overall body color is whitish or pale, but orange animals are not rare. Light brown viscera can be seen, by transparency, in the center of the dorsum. The mantle is quite flat and is characterized by having a lattice pattern consisting of differently shaped small depressions, that provide the dorsum a porous appearance. With a binocular microscope, numerous star like spicules can be seen under the mantle epidermis. The inner shell can also be observed in the central area of the mantle. The head veil, the rhinophores, the branquia and foot are whitish or yellowish. The gill is free for about one third of its total length and has about 20 lamellae on either side of the central shaft.
Biology
It is an sporadical finding, usually under stones or associated to shallow Posidonia oceanica rhizomes. The foot of this species has glands that produce acidic defensive secretions. Little is known about the biology of this species, which could feed on sponges and colonial tunicates.
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.
- Plumula. Latin origin, the aftershaft of a feather. The first bud, or gemmule, of a young plant; the bud, or growing point, of the embryo, above the cotyledons.
Distribution
This species inhabits all the European Atlantic coasts. Mediterranean specimens formerly included in this species have been classified, after the work by Ghanimi et al (2020) as B.perforata. In the Iberian Peninsula it has been observed and collected along the entire Atlantic coast, also in Madeira, Azores and the Canary Islands.
Abundance
Western Mediterranean: | ☆☆☆☆☆ |
Eastern Mediterranean: | ☆☆☆☆☆ |
Atlantic Ocean: | ★★☆☆☆ |
MonthThis chart displays the monthly observation probability for Berthella plumula based on our own records.
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Bibliography
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Further reading
Cite this article as:
Ballesteros, M., Madrenas, E. & Pontes, M. (2023) "Berthella plumula" in OPK-Opistobranquis. Published: 15/05/2012. Accessed: 04/06/2023. Available at (https://opistobranquis.info/en/YYEDg)
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