Cylichna brocchii

Cylichna brocchii (Michelotti, 1847)

Cylichna brocchii @ Premià de Mar 9.05.1989 (Col. Lluís Dantart) by Lluís Toll

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Taxonomic note: Species considered as fossil by WoRMS and CLEMAM, it is in the list of current species in Greece (Koukouras, 2010). The reports from the coasts of Maresme are the first for this species in the Spanish shores.

Synonyms

• Bulla brocchii Michelotti, 1847
• Atys brocchii (Michelotti, 1847) †

Description

Biology

Etymology

• Brocchii. In honor of Giovanni Battista Brocchi (1772-1826), Italian geologist and naturalist, who in 1802 was appointed as botany professor in the newly established high school in Brescia, Italy.

Distribution
Found in the Mediterranean only: as a fossil on the hill of Turin and in Tortona, Italy (Michelotti, 1847: 151 as Bulla Brocchii). In Greece it is reported as a current species (Koukouras, 2010). In Catalonia, Lluís Dantart found two shells on the Maresme coast: in Mataró on 5/05/1989 on a sand bottom at 10 m and at Premià de Mar on 9/05/1989 on a sand bottom at 20 m (see Toll et Ballesteros, 2017).

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Bibliography

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Ballesteros, M., Madrenas, E., Pontes, M. (2026). OPK - Opistobranquis. Disponible en: https://opistobranquis.info/ [Accedido 6 de marzo de 2026]
Koukouras, A. (2010). Checklist of marine species from Greece. Aristotle University of Thessaloniki.
Michelotti, G. (1847). Description des fossiles des terrains miocènes de l’Italie septentrionale. Natuurk. Verhand. Holl. Maatsch. Wetensch. Haarlem, 3(2): 1408, 17 pls.
Oskars, T. R., Mifsud, C., Malaquias, M. A. E. (2017). Redescription of the Cephalaspidea gastropod Atys jeffreysi (Weinkauff, 1866) (Haminoeidae), with a discussion on the phylogenetic affinities of the Mediterranean species of the genus. Journal of Natural History, 2017. https://doi.org/10.1080/00222933.2017.1340526
WoRMS Editorial Board. (2026). World Register of Marine Species. WoRMS. Disponible en: http://www.marinespecies.org
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

• Flickr pictures
• Interim Register of Marine and Nonmarine Genera
• World Register of Marine Species

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