Studies of the Myristicaceae: An overview of the Compsoneura atopa complex, with descriptions of new species from Colombia. Brittonia 54: 251–261. 2002.—The Compsoneura atopa complex (Myristicaceae) is a group of four narrowly distributed species known only from southern Panama and adjacent northwestern Colombia. As a group, these species are unmistakable in their combination of strongly brochidodromous secondary venation; ridged, rostrate, and ligneous fruit pericarp; and ferrugineous tomentum of sparsely to densely distributed, irregularly stellate trichomes on leaf lamina, petioles, young stems, inflorescences, external perianth surfaces, and external fruit pericarp. Compsoneura anoriensis and Compsoneura claroensis are described from the Río Anorí and Río Magdalena valleys of Colombia, respectively. Descriptions and diagnostic keys are presented for all species in this group.