Centric
Zygoceros
- Valves rhombic-lanceolate to triangular
- Apices with prominent raised ocelli
- Valve surface with small spines
- External rimoportula with processes
- Cingulum wide
Valves are rhombic-lanceolate to triangular in outline, with apices that are slightly produced. The valve face curves, imperceptibly, into the mantle. The valve margin is indented, or recurved, forming a narrow flange. In girdle view, frustules are rectangular.
Striae radiate from a central annulus. The annulus may be linear, narrowly...