Phylum - Gnathostomulida
Common name: Jaw Worms
Name derivation: "jaw mouth"
Order Count: 2
Family Count: 12
Genus Count: 26
Species Count: 100
Earliest Fossil Record: none
Habitat: Marine
Size Range: 0.2 mm to 4.3 mm
Notes: Based on Catalogue of Life as of March 2025