Prionostemma Acentrus
''Prionostemma'' is a large genus of harvestmen in the family Sclerosomatidae from Mexico, Central America, and South America. Species * ''Prionostemma acentrus'' Forster, 1954 * ''Prionostemma acuminatus'' * ''Prionostemma albimanum'' Roewer, 1912 * ''Prionostemma albipalpe'' (Banks, 1898) * ''Prionostemma albofasciatum'' (F.O.Pickard-Cambridge, 1901) * ''Prionostemma andinum'' Roewer, 1953 * ''Prionostemma arredoresium'' Roewer, 1953 * ''Prionostemma atrorubrum'' Roewer, 1912 * ''Prionostemma aureum'' Roewer, 1928 * ''Prionostemma aureolituratum'' Roewer, 1953 * ''Prionostemma aureomaculatum'' H.E.M.Soares, 1970 * ''Prionostemma aureopictum'' Roewer, 1953 * ''Prionostemma azulanum'' Roewer, 1953 * ''Prionostemma barnardi'' Forster, 1954 * ''Prionostemma bicolor'' Pocock, 1903 * ''Prionostemma bidens'' Roewer, 1953 * ''Prionostemma biolleyi'' (Banks, 1909) * ''Prionostemma bogotanum'' Roewer, 1953 * ''Prionostemma boliviense'' Roewer, 1953 * ''Prionostemma bryantae'' Roewer, 195 ...
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Harvestmen
The Opiliones (formerly Phalangida) are an order of arachnids colloquially known as harvestmen, harvesters, harvest spiders, or daddy longlegs. , over 6,650 species of harvestmen have been discovered worldwide, although the total number of extant species may exceed 10,000. The order Opiliones includes five suborders: Cyphophthalmi, Eupnoi, Dyspnoi, Laniatores, and Tetrophthalmi, which were named in 2014. Representatives of each extant suborder can be found on all continents except Antarctica. Well-preserved fossils have been found in the 400-million-year-old Rhynie cherts of Scotland, and 305-million-year-old rocks in France. These fossils look surprisingly modern, indicating that their basic body shape developed very early on, and, at least in some taxa, has changed little since that time. Their phylogenetic position within the Arachnida is disputed; their closest relatives may be the mites (Acari) or the Novogenuata (the Scorpiones, Pseudoscorpiones, and Solifugae). Altho ...
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