Dorsal side is slightly vaulted with three well developed dorsal ribs and two less developed ribs on lateral side. Upper lip is strongly truncated showing two anterior projections. Lateral sides provided with strong side keels. Caudal spine is straight. Strongly vaulted central side. Shell aperture is trapezoid in shape. Transverse ribs ranging from coarse to faintly developed along with growth lines comprising shell structure. [van der Spoel, 1976]
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