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Phoronis hippocrepia 2 Wright, 1856.jpg
Phoronis hippocrepia
Scientific classification e
Kingdom: Animalia
Clade: Lophophorata
Phylum: Phoronida
Family: Phoronidae
Genus: Phoronis
Wright 1856
Type species
Phoronis ovalis
Wright 1856
  • Actinotrocha Müller 1846
  • Phoronella Haeckel 1896

Phoronis is one of the two genera of the horseshoe worm family (Phoronidae), in the phylum Phoronida. The body has two sections, each with its own coelom. There is a specialist feeding structure, the lophophore, which is an extension of the wall of the coelom and is surrounded by tentacles. The gut is U-shaped. The diagnostic feature that distinguishes this genus is the lack of epidermal invagination at the base of the lophophore. These worms are filter feeders.[2]

Its larva is an Actinotrocha.


Phronis architecta is no longer accepted and is considered to be a synonym of Phoronis psammophila. Similarly Phoronis vancouverensis is considered to be a synonym of Phoronis ijimai.[3]