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McIntosh, 1908

Prostomium pentagonal with two antennae and two similar palps.
First segment with dorsal and somewhat longer ventral tentacular cirri.
Parapodia: shape of postchaetal lamellae broadly rounded always longer than the acicular lobes. Acicular lobes rounded to conical, prechaetal lamellae bilobed. Neuropodial postchaetal lamellae without vascular structures.
Gills start at segment 4 to the posterior end (N. kersivalensis-parapodium).
Pharynx with 22 longitudinal rows of 3 to 6 papillae with a mediodorsal papilla, which is almost 5 times as long as the longest subterminal papilla.

Up to 40 mm long for 80 to 85 segments.

In alcohol cream-coloured. Chaetae light brown.

Vertical distribution from the upper sublittoral down to 295 m.

Widely distributed in the area.

Nephtys kersivalensis