In zoology, the hypostome can refer to structures in distinct animal groups: Hypostome (trilobite), the ventral mouthpart plate in trilobites; Hypostome (tick), the barbed attachment structure associated with the mouthparts of parasitic arachnids; Hypostome (cnidarian), the oral tip surrounded by tentacles in hydrozoan cnidarians

The hypostome is the hard mouthpart of trilobites found on the ventral side of the cephalon (head). The hypostome can be classified into three types based on whether they are permanently attached to the rostrum or not and whether they are aligned to …

The hypostome (also called the maxilla, radula, or labium) is a calcified harpoon-like structure near the mouth area of certain parasitic arthropods including ticks, that allows them to anchor themselves firmly in place on a host vertebrate while sucking blood.

Mar 20, 2018 · Each set looks like a hand with three hooked fingers. The hooks dig in and wriggle into the skin. Then these "hands" bend in unison to perform approximately half-a-dozen breaststrokes that pull...

The meaning of HYPOSTOME is any of several structures associated with the mouth.

The hypostome is a shield-shaped, calcified ventral structure of trilobites that is thought to be a mouthpart. It lies under the medial anterior cephalon.

The hypostome (hy) of the I. ricinus tick (figure 1a(i)) is fixed immovably to the ventral surface of the basis capitulum (figure 1b). Its dorsal surface resembles a shallow basin and is fringed by rows of prominent, recurved denticles ( figure 1 a (ii)).

Ticks have 2 distinct body regions, the head (capitulum) and the body (idiosoma). The most distinctive components of the head are the palps and toothed hypostome, collectively called mouthparts. When a tick attaches to a host, the palps fold back, exposing the hypostome (a …

Nov 1, 2023 · Hypostome is a term used to refer to a ventral structure that covers the mouth in certain arthropods like trilobites, or the oral tip surrounded by tentacles in hydroid cnidarians. The term hypostome has been used in extant arthropods to refer to a variety of mouth-related organs that are not always homologous.

The figure below shows the underside of a typical trilobite fossil, with cephalic, thoracic, and pygidial doublure, the rostral plate and associated sutures, and hypostome. The dark gray area represents the hollow interior of the dorsal shell. In this case, the hypostome is separated from the rostral plate, which is called the natant condition.