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Phylum: Dicyemida
Common name: none
Name derivation: "two embryos"
Family Count: 3
Genus Count: 10
Species Count: 122
Earliest Fossil Record: none
Habitat: Marine (only in renal appendages of cephalopods)
Size Range: 0.5 mm to 7 mm
Notes: Based on Catalogue of Life as of March 2025