A parasitic worm with a thornlike proboscis for attachment to the gut of vertebrates.
- Phylum Acanthocephala.
- Cockroaches infested with another species of thorny-headed worm are also attracted to light.
- They captured mole crabs to record their size, reproductive status and infestation by thorny-headed worms, for which these crabs are intermediate hosts.
- Acanthocephalans are a type of metazoan parasite, also known as thorny-headed worms.
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Syllabification: thorn·y-head·ed worm
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