Eusyllis assimilis Marenzeller, 1875

Eusyllis assimilis Marenzeller, 1875: 158, pl. 3, fig. 2.— Fauvel, 1923: 294, fig. 112 a–g. San Martín, 2003: 114, figs. 52, 53. Eudontosyllis aciculata Knox, 1960: 105, figs. 113–117.

Material examined. Socotra, N coast, Southeast of Qualansiyah, 12º40.264’N 53º27.204E, dead coral, 5–6 m, 08.03.1999, 1 specimen (NHCY 007) . Socotra, N coast, Shanitan, 600 m off cold store, 12º40.156N 54º02.850E, 8 m, dead Acropora, 22.03.1999, 2 specimens and additional broken posterior piece (SMF 24993) .

Habitat. Occurring on different kind of substrates (algae, dead corals, sand), from 5 m as in Socotra samples, to more than 500 m depth. (San Martín & Hutchings, 2006).

Distribution. North Atlantic, Mediterranean Sea, North Pacific, New Zealand, Australia (Western Australia, South Australia, New South Wales) and Arabian Sea. (North West Indian Ocean) (San Martín & Hutchings 2006).