Tardigrada (Water Bears)

Phylum Tardigrada (Water Bears)

Wikipedia Entry

Approximate Number of Species: 800

Largest:  Thulinia ruffui at a length of  0.035 inches (0.9 mm)

Smallest:  Ligiaritus eastwardi at a length of  0.008 inches (0.2mm)


References:

Higgins RP & Thiel H eds (1988) Introduction to the study of meiofauna (Smithsonian Institute Press, Washington, D.C.).

Brusca RC & Brusca GJ (2003) Invertebrates (Sinauer Associates, Inc., Publishers, Sunderland, MA) 2nd Ed.