The valve of this taxon is linear-elliptical and it has rounded ends. The central area is rounded and it has narrow longitudinal canals. This taxon has one row of pores that are pplaced so as to look like a continuation of the alveoli. The costae are transverse and are radiate throughout the valve. There is one row of alveoli between the costae (Patrick and Reimer 1966). The characteristics of this taxon resembles Diploneis parma and Diploneis subovalis. The main difference is the single row instead of a double row of alveoli. The geographical distribution differs as well (Patrick and Reimer 1966).
Helvetia, Switzerland, New England States, Middle Atlantic States, Southeastern States, Gulf Coast States, South Central States, East Central States, West Central States, Plains States, Wyoming, Utah, Washington, and California (Patrick and Reimer 1966).