Syndermata is a clade of animals that, in some systems, is considered synonymous with
Rotifera. Older systems separate
Rotifera and
Acanthocephala
Acanthocephala (Greek , ', thorn + , ', head) is a phylum of parasitic worms known as acanthocephalans, thorny-headed worms, or spiny-headed worms, characterized by the presence of an eversible proboscis, armed with spines, which it uses to p ...
as different phyla, and group them both under Syndermata.
References
Platyzoa
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