Synopsis of the Amphibians of Equatorial Guinea based upon the Authors’ Field Work and Spanish Natural History Collections Author Sánchez-Vialas, Alberto Museo Nacional de Ciencias Naturales (MNCN-CSIC), C / José Gutiérrez Abascal, 2. 28006, Madrid, Spain; Author Calvo-Revuelta, Marta Museo Nacional de Ciencias Naturales (MNCN-CSIC), C / José Gutiérrez Abascal, 2. 28006, Madrid, Spain; Author Castroviejo-Fisher, Santiago Laboratorio de Sistemática de Vertebrados, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS). Av / Ipiranga, 6681, Prédio 40, sala 110, 90619 - 900, Porto Alegre, Brazil; * Corresponding author: IDlR (iriva @ mncn. csic. es) Author De, Ignacio Museo Nacional de Ciencias Naturales (MNCN-CSIC), C / José Gutiérrez Abascal, 2. 28006, Madrid, Spain; text Proceedings of the California Academy of Sciences 2020 2020-03-31 66 8 137 230 journal article 295393 10.5281/zenodo.11105986 4c7b4d3d-1fbe-4f48-8cb2-002e928eae42 0068-547X 11105986 Didynamipus sjostedti Andersson, 1903 TYPE LOCALITY .— “Kamerun”, Cameroon . DISTRIBUTION .— This species occurs both in continental Africa, where it extends from Cameroon (see Gonwouo et al. 2013 ) to Nigeria ( Onadeko et al. 2010 ), and on Bioko, where it was reported from Basilé by Boulenger (1906a) . Since then, no additional records have been published for this country. We found an additional population from south Bioko province, located in the surroundings of Caldera de Luba ( Map 10B ). COMMENTS .— The distribution of this poorly known species has been recently revised by Gonwouo et al. (2013) , who also provided insights on its natural history, stating that its reproductive mode is direct development. Our record from southern Bioko expands the distribution range of this species southwards. No phylogeographic studies have been performed including this monotypic taxon. The synonym Atelophryne minutus Boulenger, 1906 , described from Bioko, represents an available name if future work confirms the specific distinctiveness of insular populations. SPECIMENS EXAMINED .— Nine specimens . From Belebu to Ureca, 3°24ʹ25.81”N , 8°33ʹ3.23”E , 19 November 2003 ( MNCN 48947–48954 , 46872 ) .