Hypostome

Look up hypostome in Wiktionary, the free dictionary.

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.
• The oral tip of hydrozoan cnidarians such as Hydra

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