Reticulofenestra hesslandii

Ericsonia hesslandii Haq, 1966

Reticulofenestra haqii Backman, 1978

Medium size [4.0-8.0µm] elliptical species of Reiculofenestra Hay, Mohler & Wade (1966) with a narrow circular central opening distally but narrow elliptical central opening proximally. The size of the opening and the width of the tube cycle varies greatly.

Reticulofenestra hesslandii differs from Reiculofenestra gelida (Geitzenauer in Geitzenauer & Huddlestun, 1972) Backman (1978) and Reiculofenestra clemencesellayae Varol, in prep. by being smaller [4.0-8.0µm] whilst the later species are greater than 8.0µm. It is distinguished from Reiculofenestra asafis Varol, in prep. by having a larger, well-defined circular central opening.

Backman, J., (1978): Late Miocene - Early Pliocene nannofossil biochronology and biogeography in the Vera Basin, SE Spain. - Stockholm Contributions in Geology. 32: 93-114.

Geitzenauer, K. R. & Huddlestun, P., (1972): An upper-Pliocene-Pleistocene calcareous nannoplankton flora from a subantarctic Pacific deep-sea core. - Micropaleontology. 18(4): 405-409.

Haq, B. U., (1966): Electron microscope studies on some upper Eocene calcareous nannoplankton from Syria. - Stockholm Contributions in Geology. 15: 23-37.

Hay, W. W., Mohler, H. P. & Wade, M. E., (1966): Calcareous nannofossils from Nal'chik (northwest Caucasus). - Eclogae Geologicae Helvetiae. 59: 379-399.

Roth, P. H., (1970): Oligocene calcareous nannoplankton biostratigraphy. - Eclogae Geologicae Helvetiae. 63: 799-881.