Periclimenes dardanicola chiefly white, with red along the edges of the carapace and the abdominal somites. The legs are transparent yellow, with red bands. "P. dardanicola" is associated with the sea anemone "Calliactis", which is carried by hermit crabs of the genus "Dardanus", including "Dardanus arrosor", "D. crassimanus", "D. lagopodes" and "D. pedunculatus". This is one of the few examples of ecological associations between two species of decapod crustaceans. Specimens of "Periclimenes dardanicola" have been collected from various locations in the western Pacific Ocean, namely Suruga Bay (Japan), Vietnam, and Borneo (Indonesia). Although only formally described in 2006, this species has been
On the Tendency of Species to form Varieties; and on the Perpetuation of Varieties and Species by Natural Means of Selection the connection between natural selection and systems theory. On the Tendency of Species to form Varieties; and on the Perpetuation of Varieties and Species by Natural Means of Selection On the Tendency of Species to form Varieties; and on the Perpetuation of Varieties and Species by Natural Means of Selection is the title of a joint presentation of two scientific papers to the Linnean Society of London on 1 July 1858: "On The Tendency of Varieties to Depart Indefinitely from the Original Type" by Alfred Russel Wallace and an "Extract from an unpublished Work on Species" from Charles Darwin's "Essay"