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Common name: Horseshoe worms
Name derivation: From Phoronis, a character from Greek mythology
Number of Genus: 3
Number of known Species: 19
Earliest Fossil Record: Ordovician 485 - 443 mya
Habitat: Marine
Size Range: 15 mm to 50 cm
Notes: Regarded by some as a sub-group of Brachiopoda. Based on Catalogue of Life as of July 2024