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 Xenopus calcaratus Peters, 1875 TYPE LOCALITY .— “Cameruns (Victoria)”, Limbe , Southwest Province , Republic of Cameroon . DISTRIBUTION .— Xenopus calcaratus is distributed in the lowlands of Bioko and in the coastal region of Limbe, Cameroon . In Equatorial Guinea , this species is only present on Bioko, where it inhabits the low elevations at Punta Europa ( Boulenger 1906a ), Basupú and Arena Blanca ( Evans et al. 2015 ) ( Map 24A ). COMMENTS .— This species belongs to the subgenus Silurana . The record of X. calcaratus provided by Boulenger (1900) from “Benito River”, Río Muni , is herein allocated in the taxon X. ( Silurana ) mellotropicalis (see the respective comments in its species account) and, in a similar way, the record of Boulenger (1903) of X. calcaratus of “Cap Saint-Jean” (=Cabo San Juan), Río Muni , is herein considered as X. parafraseri , based on the description of the coloration pattern of the examined specimens ( Boulenger 1903 ) and in the extended revision of the genus by Evans et al. (2015) . SPECIMENS EXAMINED .— No specimens of the subgenus Silurana from Equatorial Guinea were found in the collections examined by us in this study.