Phylum Arthropoda (Insects, Crabs, Lobsters, Copepods, Spiders, Scorpions, Horseshoe Crabs, Centipedes, Millipedes, Barnacles, Shrimp)
Approximate Number of Species: 1,097,289
Largest: Pseudocarcinus gigas, the Tasmanian Giant Crab, obtains a carapace width of 1.5 feet (0.46 meters)
Smallest: Stygotantulus stocki, a minute parasite on copepods, only reaches a length of 0.004 inches (0.095mm)
Brusca RC & Brusca GJ (2003) Invertebrates (Sinauer Associates, Inc., Publishers, Sunderland, MA) 2nd Ed.
Martin JW & Davis GE (2001) An Updated Classification of the Recent Crustacea (Natural History Museum of Los Angeles County, Los Angeles).
Boxshall G & Huys R (1989) New tantulocarid, Stygotantulus stocki, parasitic on harpacticoid copepods, with an analysis of the phylogenetic relationships within the Maxillopoda. Journal of Crustacean Biology 91:126-140.