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Common name: Orthonectids
Name derivation: “straight swimming”
Number of Families: 2
Number of Genus: 6
Number of known Species: 25
Earliest Fossil Record: none
Habitat: Parasitic (Marine)
Size Range: 50 µm to 800 µm
Notes: Treated by some as a type of Annelid. Based on Catalogue of Life as of July 2024