This subfamily of small spiders is also known under the name Micryphantidae. The spider has a body length of 1-3 mm although a few may attain lengths up to 10 mm..
Drawing from The world of spider by W.S.Bristowe, 1958 page 271.
|See the lice in the background to have an idea how small these spiders are.|
This are often dark brown or black spiders with smooth and shiny carapaces (head-breast part). the erigonids are often found near water where they place their 5 cm square webs bewteen the grass.
Erigone arctica is also found on the sea shore were she spins her web between the cavities of seaweed and amongst pebbles where the sea must often cover her at high tide. These spider may happily run over the surface of water for a few centimeters. If no dry land is found the will return to their starting point with the help of their anchor thread they trail before making their sorties. The spiders can survice under water during high tide without making an air supply. They survive with the air stored in theit book-lungs and trachea. (W.S. Bristowe)
Ed Nieuwenhuys, December 22, 2005Salmon, J . T . and N. V . Horner 1977 . Aerial dispersion of spiders in North Central Texas . J. Arachnol. 5 :153-157 .