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A new species of Sphaerosyllis (Syllidae, Exogoninae), S. iliffei n. sp., is described from interstitial habitats of Montaña de Arena in the Atlantida Tunnel, a marine lava tube of La Corona volcano (Lanzarote, Canary Islands). The new species is characterized by lacking eyes, parapodia bearing four heterogomph compound falcigers with blade lengths decreasing from dorsalmost to ventralmost, and one...
The Jameos del Agua is a natural anchialine cave lagoon that has been developed as a tourist attraction. It is semi-illuminated due to a partial collapse of the ceiling (known as “jameo”). A fine carpet of benthic diatoms covers the bottom, in 0.5–2 m depth of water, of the tidally influenced and fully marine lagoon. Interstitial polychaetes inhabit this diatomean carpet and the lava rubble mixed...
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