hypostome

Many variations in shape and placement of the hypostome have been described.

Ventrally, a large plate has been interpreted as a hypostome.

The hypostome is inserted and this provides the initial attachment strength.

These are the hypostome, the chelicerae and the pedipalps.

The cheliceraeare the paired cutting jaws which cut a channel in skin for the hypostome.

Although hypostome morphology is highly variable, three broad types are generally recognized:

In the case of Ixodes holocyclus the hypostome is inserted very deep into the dermis.

Hypostome consists of two longitudinal sclerites, which are moved apart by the protruding regularly plate.

The hypostome is the single feeding tube which also anchors the tick by its reverse barbs.

They are named for the distinctive shape of their hypostome, the "tip" of the polyps' body where the mouth is located.

The pair of relatively short antennas are implanted behind the horns of the hypostome and stick out to the sides.

These have a more or less cylindrical body with a terminal mouth on a raised protuberance called the hypostome, surrounded by a number of tentacles.

Trilobites, in particular, possess a ventral sclerotised plate in the head called the hypostome.

Functional interpretations of hypostome shape also allow for reasonable speculation on the feeding habits of trilobite species.

It is absent when the hypostome is free-floating (i.e. natant).

They are characterized by elongated and undercut hypostome that creates an indention superior to the gastric cavity.

A natant hypostome is not attached to the anterior doublure, with support assumed to be provided by a non-mineralised membrane.

Of particular interest are "macula", the small areas of thinned cuticle on the underside of the hypostome.

The basis capituli forms the basal ring of cuticle to which the palps, chelicerae and hypostome are attached.

The apical portion of the polyps of hydrozoan cnidarians like Hydra is referred to as a hypostome.

The hypostome is hollow, and encloses the mouthparts, the anterior digestive track, and the bases of the antennae.

The 'palate' (or hypostome) is not connected to the dorsal shield of the cephalon (or natant).

Specific changes to the cephalon are also noted; variable glabella size and shape, position of eyes and facial sutures & hypostome specialization.

The hypostome is the hard mouthpart of the trilobite found on the ventral side of the cephalon typically below the glabella.

The mouth plate (or hypostome) that sits on the belly-side of the cephalon is elongated and divided by a straigt left to right suture.