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species is absent in the checklist of the Italian marine fauna (Castelli et al., 2008) in the
sectors 1 e 2. The species has been already reported in Elba area, for instance by
Bianchi et al. (2003) and Lardicci et al. (1990). According to Bonse et al. (1996)
Eulalia viridis proved to be a complex of semispecies: E. viridis, E. clavigera and E.
aurea. The careful observation of the Enfola specimens allows to attribute them to E.
clavigera, a Mediterranean species: on the contrary E. viridis is considered typical of
the Northern Europe seas.
Five specimens of the Nereididae Nereis zonata were sampled in the northern area and
44 in the southern one, in May and September. This species is considered today a
synonym of Nereis pulsatoria (Viétez et al., 2004), absent instead in the checklist of
the Italian marine fauna (Castelli et al., 2008).
Conclusions – As regards the two species of Gastropods, their presence in northern
sector of the Mediterranean sea can be attributed to the temperature increase of the
shallow waters.
With respect to the Polychaetes the review of nomenclature and the adjustment of the
checklist of the Italian marine fauna would be advisable, to avoid possible confusion.
References
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