Streptosyllis aequiseta Hartmann-Schröder 1981 and Dentatisyllis junoyi López and San Martín 1992 are tropical Indo-Pacific Syllid species that have been recorded in sediment bottom in Australia (San Martín and Hutchings, 2006) and West Africa (López and San Martín, 1992). They were collected during Salsabeel cruises to the North Eastern and Western Mediterranean Coast of Egypt (Sidi-Barrani, El-Hammam, Rashid, and El-Bourrlus Coast) in spring 2009 and 2010. Eight Syllid species belonging to Subfamily Eusyllinae and Syllinae were reported, five species namely; Streptosyllis pterochaeta, Plakosyllis brevipes, Pionosyllis Serratisetosa, Syllis streptodonta and Syllis torquata are new for Mediterranean Egyptian waters, and one species was identified as Typosyllis benguellana (Day, 1963), though it needs further examination to be confirmed as Typosyllis sp., and the two Indo-Pacific species were recorded for the first time in the Mediterranean waters, and seem to be Lessepsian migrant species.
Key words: Polychaeta, Syllidae, North Mediterranean, Egypt, Lessepsian species
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