A new species of lizard genus Enyalius (Squamata, Leiosauridae) from the highlands of Chapada Diamantina, state of Bahia, Brazil, with a key to species - Rodrigues, Miguel Trefaut; Freitas, Marco Antonio de; Silva, Thais Figueiredo Santos; Bertolotto, Carolina Elena Viña (Phyllomedusa, 2006)