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Acanthocephala
(
Greek
?κανθο?
,
akanthos
, thorn +
κεφαλ?
,
kephale
, heid) is a
phylum
o
parasitic
wirms
kent as
acanthocephalans
,
thorny-heidit wirms
, or
spiny-heidit wirms
an aw, chairacterised bi the presence o an eversible
proboscis
, airmed wi spines, that it uises to pierce an hauld the
gut
waw o its host.