Dorsal sclerite of head.

The 9 body segments lying posterior to the three thoracic segments.

A thin, flat appendage of blade, usually on apex of basal antennal segment, joined with blade at base.

In the direction or position of the anus, near the anus or on the last abdominal segment; towards the posterior.

Setae mounted apically on the procercus.

1-3 (usually 2) pairs of mostly oblong (but also ovoid, tapering, etc.) appendages of the anal segment above and between posterior parapods.

Comprised of ring(s).

Base or platform on which antenna is located.

(of larva) the ratio of the 1st antennal segment to the combined lengths of the distal ones (the flagellum).

At or towards the front.