Vargas Paredes, V. and Pintaud, J.-C. 2008. Characterization of a parapatric contact zone between Astrocaryum macrocalyx and Astrocaryum urostachys at the boundary of the Marañón-Pastaza flood plain and the Iquitos arch. Revista Peruana de Biología. 15, 3 (Nov. 2008), 079–083. DOI:https://doi.org/10.15381/rpb.v15i3.3073.