Resumen de Foraminiferal and algal evidence for the recognition of the Asbian/Brigantian boundary in the Guadiato area (Mississippian, southwestern Spain)
Foraminiferal and algal assemblages from the composite Sierra del Castillo and El Collado sections in the Guadiato Area (southwestern Spain) record the interval spanning the Asbian/Brigantian boundary. Typical Brigantian foraminiferal markers in other European basins are rarely recorded. The first occurrences, last occurrences and acmes of the taxa recorded in the Guadiato Area are compared with those from other western Tethyan basins, especially with the Brigantian stratotype section at Janny Wood in England. In the Guadiato Area, the Brigantian can be recognised by the first occurrence (Pojarkovella guadiatensis, Climacammina sp., Janischeswkina? sp., Eostaffella aff. ikensis, Calcifolium? punctatum), last occurrence (Vissariotaxis spp.), marked decrease in numbers (Kamaenella tenuis, Koninckopora spp.) and acmes (Pseudoendothyra sublimis, Endostaffella, Pojarkovella efremovi, Eovelebitella sp.) observed in numerous algal and foraminiferal taxa
