REVISION ON THE SPECIES OF PSEUDOLACAZINA CAUS 1979 (FORAMINIFERIDA) FROM THE DIFFERENT LOCALITIES OF TURKEY

Abstract

The megalospheric and microspheric specimens of the one fabularid species were first described and figured as Fabularia alpani Sirel and Lacazina blumenthali Reichel and Sigal respectively by Sirel from the llerdiain exotic limestone blocks within the ophiolitic melange near the village of Pemavut, S of Kars, Eastern Turkey. This large fabularid species is reexamined on the new material from the foregoing locality. In the result of this study, megalospheric specimens F.alpani and microspheric specimens L. blumenthali were renamed as a species of Pseudolacazina Caus "Pseudolacazina alpani (Sirel)"by the following generic features: all the chambers of the megalospheric specimens are arranged in biloculine mode; microspheric specimens start growth with quinqueloculine chambers cycles reduced biloculine and monoloculine; chambers subdivided by continuous, longitudinal partitions (as septula) in both generations. On the other hand, the Anatolian Thanetian species Pseudolacazina oeztemueri (Sirel) and the Yugoslavian species Pseudolacazina donatae (Drobne) are described and figured. The specific differences of P. alpani, P.oeztemueri and P. donatae are discussed with the other species of Pseudolacazina.