Tozerium sp. A

(Fig. 9S, T)

OCCURRENCE. — Lower Jurassic, lower Lower Pliensbachian of Orbuklukeli section, Mersin Mélange, NW of Mersin city, southern Turkey.

DESCRIPTION

Cortical shell small, subsphaerical with four strong spines. It composed of small, polygonal pore frames (mainly triangular) with small, circular nodes at pore frame vertices. Primary spines tetrahedrally disposed, strong, tricarinate with prominent ridges and shallow grooves. They are slightly decreasing in width distally and very slightly dextrally twisted.

REMARKS

This taxon differs from Tozerium orbuklukeliense Tekin, n. sp. by having tricarinate and slightly dextrally twisted spines instead of needle-like spines.