Nematomorpha (Horsehair Worms)

Phylum  Nematomorpha (Horsehair Worms)

Wikipedia Entry

Approximate Number of Species: 320

Largest: Nectonema melanocephalum at a length of  15.75 inches (400 mm)

Smallest: Nectonema munidae at a length of  0.39 inches (10 mm)

Nematomorph (Horsehair) worm photo by Anders Lennver via Flikr

References:

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

Schmidt-Rhaesa, personal communication