Hypostome

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