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Common name: Goblet Worms
Name derivation: “anus inside”
Order Count: 2
Family Count: 4
Genus Count: 15
Species Count: 171
Earliest Fossil Record: Late Jurassic 162 – 145 mya
Habitat: Marine, Freshwater
Size Range: 0.1 mm to 7 mm
Notes: Based on Catalogue of Life as of March 2025