The prostomium (From Ancient Greek, meaning "before the mouth"; pl.: prostomia; sometimes also called the "acron") is the cephalized first body segment...

directly behind the prostomium and contains the mouth, tentacular cirri, and sometimes feeding palps, which may instead occur on the prostomium. If an eversible...

generally in the prostomium, while those of clitellates are in the peristomium or sometimes the first segment behind the prostomium. In some very mobile...

Violet-coloured prostomium. Anterior margin of prostomium with an acute anterior projection. Lateral antennae inserted ventrally (beneath prostomium and median...

earthworm's mouth and, overhanging the mouth, a fleshy lobe called the prostomium, which seals the entrance when the worm is at rest, but is also used to...

segment 11; prostomium white. Anterior margin of prostomium with an acute anterior projection. Lateral antennae inserted ventrally (beneath prostomium and median...

the anteriormost segments may be specialised into the head region and prostomium, which can result in the modification of those parapodia, loss of chaetae...

to move Explosively evert pharynx into sediment, anchor position with prostomium and pull body forward. Eversible pharynx also used in prey capture: 4...

The head consists of two parts: a roughly triangular anterior lobe—the prostomium—and a posterior ring-like portion—the peristomium. The latter bears four...

head, a cylindrical, segmented body and a tail piece. The consists of a prostomium (a section for the mouth opening) and a peristomium (section around the...