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Further record of Chlamys lischkei (Bivalvia: Pectinoidea) in the Mediterranean Sea Fabio Crocetta and Walter Renda Marine Biodiversity Records / Volume 1 / January 2008 / e57 DOI: 10.1017/S1755267207006045, Published online: 12 February 2009
Link to this article: http://journals.cambridge.org/abstract_S1755267207006045 How to cite this article: Fabio Crocetta and Walter Renda (2008). Further record of Chlamys lischkei (Bivalvia: Pectinoidea) in the Mediterranean Sea. Marine Biodiversity Records, 1, e57 doi:10.1017/S1755267207006045 Request Permissions : Click here
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Marine Biodiversity Records, page 1 of 2. #2007 Marine Biological Association of the United Kingdom doi:10.1017/S1755267207006045; Vol. 1; e57; 2008 Published online
Further record of Chlamys lischkei (Bivalvia: Pectinoidea) in the Mediterranean Sea fabio crocetta1 and walter renda2 1
Via D. Fontana, 81 80128 Napoli, Italy, 2Via Bologna, 18/A 87032 Amantea (CS), Italy
A further specimen of the rare allochthonous scallop Chlamys lischkei was found at Schiavonea di Corigliano Calabro, Gulf of Corigliano (Cosenza), while SCUBA diving at a depth of about 30 m on a muddy detritic bottom. This new single record, the third for the entire Mediterranean Sea and the second for the Italian Seas, confirms the sporadic presence, often believed uncertain, of this species in the Mediterranean Sea.
Keywords: Mollusca, Chlamys lischkei, Pectinidae, Mediterranean Sea, allochthonous
Chlamys lischkei (Dunker, 1850) is a species belonging to Pectinidae with a large, light, inequivalve and inequilateral shell. The outline is discoid with small and unequal ears. The lower valve is flatter, while the upper one is slightly convex with the sculpture of numerous fine ribs and finer riblets between them. The surface is rough. The colour is externally left valve rose-cream, right valve white with pink spots at the umbonal area, while internally it is glossy white with pink spots (Zenetos et al., 2003). It can be confused only with Chlamys islandica (Mu¨ller, 1776), which is found in the North Sea, while it seems sure that it is synonymous with Zygochlamys patagonica (King & Broderip, 1832; Jonkers, 2003). The species usually occurs on southern American coasts from Brazil to Argentina (Rombouts, 1991), where it is common and of commercial interest, but till now also in the Mediterranean Sea two specimens were found (Zenetos et al., 2003). Gubbioli & Nofroni (1985), in fact, reported one live specimen of 51 mm from Alboran Island taken during a commercial trawl haul, while another specimen, also 51 mm, dead but still fresh, was reported by Repetto (1989) from Favignana Island, taken by a SCUBA diver at a depth of about 25 m (Zenetos et al., 2003). During the periodical analysis (SCUBA diving and monitoring of mollusca catches by local fishermen) carried out in the Gulf of Corigliano (CS) (Figure 1) from the early 1980s, one dead specimen of Chlamys lischkei was found while SCUBA diving at a depth of about 30 m on a muddy detritic bottom. It was surely freshly dead and both valves were found inside tentacles of an Octopus vulgaris Cuvier, 1797, by which it had probably just been eaten. Its sculpture is of 42 principal ribs, its sizes 44 mm maximum length and 47 mm maximum height (Figure 2). The record of this rare allochthonous scallop, the third for the whole Mediterranean Sea and the second for the Italian Seas, confirms the doubtful and sporadic presence of this species in the Mediterranean and extends its actual known distribution, even if at the moment no established
Corresponding author: F. Crocetta Email:
[email protected]
populations are recorded. As with the others, and especially for this last one, all the reported findings were far out of interference with shipping and marine farming. So, according to Zenetos et al. (2003), the mode of introduction of Chlamys
Fig. 1. The Ionian Sea with the location (†) where Chlamys lischkei was found.
Fig. 2. Chlamys lischkei found at Schiavonea di Corigliano Calabro.
1
2
f. crocetta and w. renda
lischkei in the Mediterranean Sea was probably by shipping, but its diffusion is perhaps due to natural causes. The only few records made up to now are explained by its rarity in the area, and therefore each specimen found has to be reported as soon as possible to monitor whether an established population is present in the Mediterranean Sea and its distribution.
Monographs of Marine Mollusca No. 5. Leiden: Backhuys Publishers. VIII þ 125, 17 pls. Repetto G. (1989) Nuovo ritrovamento in Mediterraneo di Chlamys lischkei (Bunker, 1850). Bollettino Malacologico 25, 261–262. Rombouts A. (1991) Guidebook to Pecten shells. Recent Pectinidae and Propeamussidae of the world. London: Robert Hale. and
ACKNOWLEDGEMENT
Zenetos A., Gofas S., Russo G. and Templado J. (2003) CIESM Atlas of exotic species in the Mediterranean. Vol. 3. In Briand F. (ed.) Molluscs. Monaco: CIESM Publishers.
We are grateful to Dr Enzo Campani for his suggestions.
REFERENCES Gubbioli F. and Nofroni I. (1985) Note malacologiche dal mare di Alboran (Mediterraneo occidentale). Contributo 1. La Conchiglia 200–201, 20–21. Jonkers H.A. (2003) Late Cenozoic–Recent Pectinidae (Mollusca: Bivalvia) of the Southern Ocean and neighbouring regions.
Correspondence should be addressed to Fabio Crocetta Via D. Fontana 81 80128 Napoli Italy email:
[email protected] Submitted 1 October 2006 Accepted 10 August 2007 Published 11 August 2007 on MBA website
