Foraminifera source details
Wielandt-Schuster, U. (2004). Neogene larger forminifera of the Mesohellenic Basin, Greece. Courier Forschungsinstitut Senckenberg. 248: 183-225.
Neogene larger forminifera of the Mesohellenic Basin, Greece
Courier Forschungsinstitut Senckenberg
Rupelian and Burdigalian foraminiferal assemblages from the Mesohellenic Basin of northern Greece are investigated with respect to their palaeoecological and palaeobiogeographical implications. Their occurrences are compared with literature data on the Mediterranean Tethys and the Indopacific. The studied material is derived from three localities: Mesolouri/Doutsiko section (Rupelian & Chattian) from the western border of the basin, Meteora (Chattian) in the South, and Dragasia section (Burdigalian) from the northern part of the basin. Potential habitats suitable for larger foraminifera did exist in the Oligocene and also in the Early Miocene, but the diversity drops from 20 species in the Oligocene to only three species (Operculina complanata, Heterostegina sp., and Amphistegina sp.) in the Burdigalian. One new species Operculina hellenica n. sp. occurring in the late Rupelian and Aquitanian, is introduced. The drastic decline in larger foraminiferal taxa in the Mesohellenic Basin from the Rupelian to the Burdigalian is suggested to reflect the decrease of the paleo water temperatures, and a highered nutrient content within the small Mesohellenic basin compared to the Mediterranean Tethys.