The Príncipe seedeater was formerly placed in the
genusSerinus but phylogenetic analysis using
mitochondrial and nuclear DNA sequences found that the genus was
polyphyletic.[3] The genus was therefore split and a number of species including the Príncipe seedeater were moved to the resurrected genus Crithagra.[4][5]
Christy, P. & Clarke, W. V. (1998). Guide des oiseaux de São Tomé et Príncipe (Guide to the Birds of São Tomé and Príncipe). Libreville, Ecofac, 106 pages
Jones, P. J. & Tye, A. (2006). The Birds of São Tomé and Príncipe with Annobón, islands of the Gulf of Guinea. British Ornithologists’ Union, Oxford, 192 pages
Melo, M. (2007). Bird speciation in the Gulf of Guinea. PhD, School of Biological Sciences, Institute of Evolutionary Biology, University of Edinburgh, Edinburgh.
Naurois, de, R. (1975). Les Carduelinae des îles de São Tomé et Príncipe (Golfe de Guinée) (Carduelinae in the Islands of São Tomé and Príncipe (Gulf of Guinea)). Ardeola 21 : 903–931.