New Middle Permian (Capitanian) fusulinid genera from the Karakaya Complex, central Anatolia, Turkey: Taxonomic remarks

Abstract

The Karakaya Complex widely exposed in the north of Turkey can be differentiated into two units as the Lower Karakaya Complex and Upper Karakaya Complex. A tectonic slice composed of medium to thick-bedded limestone belonging to the Upper Karakaya Nappe is located to the south of Ankara near Gokcehuyuk village. A very diverse fusulinid fauna from this slice has two new taxa of Middle Permian (Capitanian) age. As a result of the study of the fusulinids from the strata of the Upper Karakaya Nappe, two new genera Postkwantoella and Kahlerinella are proposed as well as two subfamilies: Kwantoellinae subfam. nov. (Postkwantoella) and Kahlerininae (Kahlerinella). The new genus Postkwantoella differs from the similar genus Kwantoella by well-developed axial fillings and fewer volutions. Wall structure and completely straight coiling of these latter two genera indicates that they should be classified under the Kwantoellinae subfam. nov. The other new genus, Kahlerinella, is differentiated from the closely related genus Kahlerina by having lenticular early whorls, globular test shape and by the absence of chomata.