Body length 100-138 µm, lateral outline subcircular; anterior girdle list large in size than posterior one, usually with 8-18 ribs, distally with very much reticulations; posterior girdle list with 12-15 simple and sometime reticulated ribs; girdle wider on dorsal side; left sulcal list end on dorsal side of body and is biangular and quadrate shaped, finishing parallel with dorsal plane; usually with a submarginal rib; one lobe is posteroventral, the other posterodorsal, usually with 5-6 ribs behind fission rib, these ribs have reticulation; some times the margins of the left sulcal list, when fully developed, bears numerous reticulae to the exterior of the marginal rib; the list ribs are relatively smooth; anterior girdle list with numerous complete and incomplete ribs.