Phylum - Gastrotricha
Common name: Hairybellies
Name derivation: "stomach hair"
Order Count: 2
Family Count: 18
Genus Count: 73
Species Count: 894
Earliest Fossil Record: None
Habitat: Marine, Freshwater, Terrestrial
Size Range: 0.07 mm to 4 mm
Notes: Based on Catalogue of Life as of March 2025