Priapula (Penis Worms)

Phylum Priapula (Penis Worms)

Wikipedia Entry

Approximate Number of Species: 16

Largest:  Halicryptus higginsi at a length of 15.75 inches (400 mm)

Smallest:  Tubiluchus sp. at a length of  0.0787 inches (2 mm)

References:

Shirley TC & Storch V (1999) Halicryptus higginsi sp. nov. (Priapulida). A giant new species from Point Barrow, Alaska. Invertebrate Biology 118:404-413

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