Eucytherura sp. 5 Franz et al., 2018

Fig. 9: 6

Material .

1 C in sample He19-19; 5 RV, 1 LV from the Geisingen clay pit.

Occurrence.

Lower to Upper Aalenian, Opalinum to Bradfordensis zones; SW Germany.

Description.

Very small, subovoidal. Anterior margin asymmetrically rounded with extremity below mid-height; posterior margin pointed, apex above mid-height. Posterior cardinal angle rounded; anterior cardinal angle pronounced in both valves. Dorsal margin slightly convex, ventral margin convex. Greatest height at anterior cardinal angle; greatest length above mid-height. Shell surface irregularly and coarsely reticulated. The most striking feature is the gently undulating surface with slight anterodorsal, middorsal and anteroventral depressions. The eye-tubercle is fused with a short, indistinct frontal rib. A short bulge-like rib is located at the posterior cardinal angle. Internal details not observed.