Amphibia, Anura, Centrolenidae, <i>Chimerella mariaelenae</i> (Cisneros-Heredia and McDiarmid, 2006), <i>Rulyrana flavopunctata</i> (Lynch and Duellman, 1973), <i>Teratohyla pulverata</i> (Peters, 1873), and <i>Teratohyla spinosa</i> (Taylor, 1949): Historical records, distribution extension and new provincial record in Ecuador