Hypostome

Updated on Feb 12, 2026

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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

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