Josa is a genus of South American anyphaenid sac spiders first described by Eugen von Keyserling in 1891. It is a senior synonym of "Gayenella", "Haptisus", "Olbophthalmus", and "Pelayo".
Species it contains fifteen species:
Josa analis (Simon, 1897)—Venezuela Josa andesiana (Berland, 1913)—Ecuador Josa bryantae (Caporiacco, 1955)—Venezuela Josa calilegua Ramírez, 2003—Argentina Josa chazaliae (Simon, 1897)—Colombia Josa gounellei (Simon, 1897)—Brazil Josa keyserlingi (L. Koch, 1866)—Colombia, Brazil Josa laeta (O. Pickard-Cambridge, 1896)—Costa Rica Josa lojensis (Berland, 1913)—Ecuador Josa lutea (Keyserling, 1878)—Colombia, Ecuador Josa maura (Simon, 1897)—Venezuela Josa nigrifrons (Simon, 1897)—Mexico to Bolivia Josa personata (Simon, 1897)—Ecuador Josa riveti (Berland, 1913)—Ecuador, Bolivia Josa simoni (Berland, 1913)—Ecuador
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