cystacanth
n. [Gr. kystis, bladder; akantha, thorn]
(ACANTHOCEPHALA)
A juvenile having all adult structures, except the reproductive system is immature; proceeds to a quiescent state in an arthropod intermediate host; adulthood is reached when ingested by the definitive vertebrate host.

Online Dictionary of Invertebrate Zoology. . 2005.

Look at other dictionaries:

  • cystacanth — The fully developed larva of Acanthocephala, infective to the final host and with an inverted fully formed proboscis characteristic of the adult worm. [cyst + G. akantha, thorn or spine] …   Medical dictionary

  • spiny-headed worm — /spuy nee hed id/ any of a small group of endoparasites of the phylum Acanthocephala, as larvae parasitic in insects and crustaceans and as adults in various vertebrates. [1945 50] * * * Introduction also called  acanthocephalan        any animal …   Universalium

  • Acanthocephala — Taxobox name = Acanthocephala image width = 240px image caption = Adult Pomphorhynchus in a Bluefish ( Pomatomus saltatrix ) regnum = Animalia subregnum = Eumetazoa unranked phylum = Bilateria superphylum = Platyzoa phylum = Acanthocephala phylum …   Wikipedia

  • Acanthocephala — Kratzwürmer Pomphorhynchus im Rektum eines Blaufisches (Pomatomus saltatrix) Systematik …   Deutsch Wikipedia

  • Kratzwurm — Kratzwürmer Pomphorhynchus im Rektum eines Blaufisches (Pomatomus saltatrix) Systematik …   Deutsch Wikipedia

  • Kratzwürmer — Pomphorhynchus im Rektum eines Blaufisches (Pomatomus saltatrix) Systematik Unterreich: Vielzell …   Deutsch Wikipedia

  • Moniliformis moniliformis — Scientific classification Kingdom: Animalia Phylum: Acanthocephala Class …   Wikipedia

  • acanthella larva — (ACANTHOCEPHALA) Transitional larva developed from an acanthor after crossing through the gut wall into the intermediate host hemocoel; stage between an acanthor and a cystacanth in which the definitive organ systems are developed …   Dictionary of invertebrate zoology

  • acanthella — An intermediate larva stage of Acanthocephala, formed within the arthropod host; a preinfective, nonencysted stage leading to the infective cystacanth. [G. akantha, thorn, spine] …   Medical dictionary

  • Macracanthorhynchus — A genus of giant thorny headed worms (class Acanthocephala). [macro + G. akantha, thorn, + rhynchos, snout] M. hirudinaceus the giant thorny headed worm of the pig, approximately the size of the giant roundworm (Ascaris); it inhabits the… …   Medical dictionary

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