Redescripción de "Bournonia gardonica" (Toucas, 1907) (Radiolitidae, Bivalvia) y análisis de las facies en que aparece (Coniaciense, Sistema Central, España))
Redescription de "Bournonia gardonica" (Toucas, 1907) (Radiolitidae, Bivalvia) and analysis of the facies where it appears (Coniacian, Sistema Central, Spain)