Opiliones (formerly Phalangida) are an order of arachnids commonly known as harvestmen. As of 2006, over 6,400 species of harvestmen have been discovered worldwide, although the real number of extant species may exceed 10,000. The order Opiliones can be divided into four suborders: Cyphophthalmi, Eupnoi, Dyspnoi and Laniatores. Well-preserved fossils have been found in the 400-million year old Rhynie cherts of Scotland, which look surprisingly modern, indicating that the basic structure of the harvestmen has not changed much since then. Phylogenetic position is disputed: their closest relatives may be the mites (Acari) or the Novogenuata (the Scorpiones, Pseudoscorpiones and Solifugae).
Saturday, September 29, 2012
harvestmen
Opiliones (formerly Phalangida) are an order of arachnids commonly known as harvestmen. As of 2006, over 6,400 species of harvestmen have been discovered worldwide, although the real number of extant species may exceed 10,000. The order Opiliones can be divided into four suborders: Cyphophthalmi, Eupnoi, Dyspnoi and Laniatores. Well-preserved fossils have been found in the 400-million year old Rhynie cherts of Scotland, which look surprisingly modern, indicating that the basic structure of the harvestmen has not changed much since then. Phylogenetic position is disputed: their closest relatives may be the mites (Acari) or the Novogenuata (the Scorpiones, Pseudoscorpiones and Solifugae).
Subscribe to:
Post Comments (Atom)
-
Nureongi (누렁이) and Hwangu (황구; 黃狗) are Korean terms meaning "Yellow Dog" used to refer to tannish mongrel or landrace of dog in... -
Engrams are a hypothetical means by which memory traces are stored as biophysical or biochemical changes in the brain (and other neural...
No comments:
Post a Comment