Aechmina
Straight-hinged, simply convex Ostracoda without pit or sulcus, and lobation confined to a single, sometimes enormously developed hornlike process (Bassler and Kellett, 1934).
Species
Aechmina richmondensis Ulrich and Bassler, 1923
Occurrence: Fulton, Arnheim, Waynesville, Liberty, Whitewater, Elkhorn
Reference: Dalvé, 1948; Bassler and Kellett, 1934