Trepaxonemata

Trepaxonemata
Spermatozoa of various Trepaxonemata (transverse sections, transmission electron microscopy)
Scientific classification
Kingdom: Animalia
Phylum: Platyhelminthes
Subphylum: Rhabditophora
Clade: Trepaxonemata
Ehlers, 1985
Subgroups

See text

Trepaxonemata (from trepa-, spiral + axoneme) is a clade of flatworms. It includes all parasitic flatworms (clade Neodermata) and several free-living species that were previously grouped in the now obsolete class Turbellaria. Therefore, it contains the majority of species in the phylum Platyhelminthes, excluding Catenulida and Macrostomorpha.

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