Chaetonotidae is a family of gastrotrichs in the order Chaetonotida. It is the largest family of gastrotrichs with almost 400 species, some of which are marine and some freshwater. Current classification is largely based on shape and external structures but these are highly variable. Molecular studies show a high level of support for a clade containing Dasydytidae nested within Chaetonotidae. Genera The following genera are included in the family Chaetonotidae according to the World Register of Marine Species: Subfamily Chaetonotinae Kisielewski, 1991 Genus Arenotus Kisielewski, 1987 Arenotus strixinoi Kisielewski, 1987 Genus Aspidiophorus Voigt, 1903 Genus Caudichthydium Schwank, 1990 Genus Chaetonotus Ehrenberg, 1830 Genus Fluxiderma d'Hondt, 1974 Genus Halichaetonotus Remane, 1936 Genus Heterolepidoderma Remane, 1926 Genus Ichthydium Ehrenberg, 1830 Genus Lepidochaetus Kisielewski, 1991 Genus Lepidoderma Genus Lepidodermella Blake, 1933 Genus Polymerurus Remane, 1927 Genus Rhomballichthys Schwank, 1990 Genus Chitonodytes Genus Hemichaetonotus Genus Pseudichthydium Subfamily Undulinae Kisielewski, 1991 Genus Undula'' Kisielewski, 1991 References External links Gastrotricha Platyzoa families Taxa named by Philip Henry Gosse