prostomium

The prostomium or head is a blunt cone with a row of 4 to 8 large black eyes on either side.

The head, or prostomium, is relatively well developed, compared with other annelids.

This is formed into shape by a collar found just behind the first segment, the prostomium.

It is probably homologous with the prostomium of other annelids.

The head is formed from the prostomium and peristomium, which are fused.

Tentacles extended from the prostomium and may have served as sensory organs.

The shape and composition of prostomium are important for annelid systematics.

It houses a brain and may be homologous to the prostomium of an annelid.

The head consists of two segments: the anterior and posterior prostomium.

The prostomium has a median antenna and a pair of lateral antennae.

The prostomium generally has a proboscis, from which the genus has got its name.

Some species of earthworms have a tongue-like lobe above the mouth called prostomium.

The body is cylindrical and the prostomium bears three antennae and four eyes.

The prostomium is actually a sensory device.

The peristomium is a ring, often hidden dorsally by the prostomium and the first segment.

The prostomium often also has appendages such as palps and tentacles or cirri.

The prostomium supports a pair of groved palps that have, primarily, a sensory purpose.

The head is formed by the fusion of a funnel-shaped, symmetrical peristomium with the prostomium.

The prostomium bears a specialized mouth appendage which is referred to as a branchial crown.

The prostomium has no appendages or palps.

The first of these segments is the collar segment (peristomium), to which the prostomium is attached.

Explosively evert pharynx into sediment, anchor position with prostomium and pull body forward.

Spionids have a single pair of flexible feeding tentacles with grooves, arising directly from the prostomium.

The prostomium is fused with the peristomium and bears a ring of feathery feeding tentacles.

The funnel-shaped, symmetrical peristomium is fused with the prostomium to form the head, at the anterior end of the body.