Roy W. McDiarmid Glenn Flores 1989 Two new <i>Centrolenella</i> are described, <i>C. azulae</i> from the Cordillera Azul of Perú, and <i>C. puyoensis</i> from the Amazonian slopes of the Ecuadorian Andes. <i>Centrolenella azulae</i> is distinguished by its moderately large size, the presence of vomerine teeth, a snout truncate in dorsal view and slightly protruding in profile, a color pattern in preservative of very diffuse lavender with small colorless spots, basal webbing on the outer fingers, and a low ulnar fold. <i>Centrolenella puyoensis</i> is distinguished by its moderately large size, a snout truncate in dorsal view and rounded in profile, a color pattern in preservative of purplish-gray with large cream spots, a tympanum that is three-fourths exposed, and intricate anal ornamentation. Both new species are closely related to the Peruvian <i>C. mariae</i>, and together the three species form the <i>C. mariae</i> group, definable on a number of shared, derived characters. A hypothesis of relationships within the <i>mariae</i> group is presented, postulating <i>puyoensis</i> as the most primitive and <i>azulae</i> as the most derived of the trio. application/pdf en Herpetologists' League Two new species of South American <i>Centrolenella</i> (Anura: Centrolenidae) related to <i>C. mariae</i> article