The junction between the anteromedian and anterointermediate spines is sharply notched. Posterior spines are not present. The length measurements are as follows: lorica 154 µm, anterolateral dorsal spine 11-17 µm, anterointermediate dorsal spine 9-20 µm, anteromedian dorsal spine 38-52 µm. The distance between the anterolateral spines ranges from 130 to 142 µm.