MORFOLOGÍA, BIOMETRÍA Y TAXONOMÍA DE FORAMINÍFEROS PLANCTÓNICOS DEL DANIENSE BASAL: Palaeoglobigerina n. gen.

The lowermost Danian contains oligotaxic planktic foraminiferal assemblages with species of small size ( Palaeoglobigerina n. gen. is proposed to include the small trochospiral globigerinid species, with smooth wall-texture, 3-4 chambers in the last spire whorl, occurring in the Guembelitria cretacea and Parvularugoglobigerina eugubina Zones (lowermost Danian). Twenty two species are recognized, described and illustrated: five of Guembelitria , two of Hedbergella , two of Woodringina , two of Chiloguembelina , five of Palaeoglobigerina n. gen., and six of Parvularugoglobigerina .