found: Miller, W.R. Tardigrades : bears of the moss, 1997:p. 3 (Tardigrada; phylum of invertebrates; "Water Bears" or "Moss Piglets") p. 5 (three classes: Heterotardigrada (2 orders with 8 families), Mesotardigrada (1 order with 1 family), Eutardigrada (2 orders with 6 families))
found: ITIS, Sept. 1, 2004(Phylum Tardigrada -- tardigrades, water bears)
found: The American Heritage dictionary of the English language, via WWW, Sept. 1, 2004(tardigrade: Any of various slow-moving, microscopic invertebrates of the phylum Tardigrada, related to the arthropods and having four body segments and eight legs and living in water or damp moss. Also called water bear)
found: ITIS, Jan. 6, 2017(Tardigrada. Taxonomic rank: phylum. Common names: tardigrades; water bears. Superphylum Ecdysozoa, Infrakingdom Protostomia, Subkingdom Bilateria, Kingdom Animalia)
found: NCBI taxonomy browser, Jan. 6, 2017(Tardigrada (water bears). Common name: tardigrades. Genbank common name: water bears. Lineage: cellular organisms; superkingdom Eukaryota; [no rank] Opisthokonta; kingdom Metazoa; [no rank] Eumetazoa; [no rank] Bilateria; [no rank] Protostomia; [no rank] Ecdysozoa; [no rank] Panarthropoda)
