Length:161

Width:6

Keel punctae:12

Striae:22

Collection 1189

Hust., 1950.

This is an enlargement of the central portion of the valve. Note the undulation in the valve face.

This is a close-up of the central area showing the gap in the keel punctae and the valve face undulation.

This is a close-up of the end of the valve (1189).

Ecology