Diploneis texana guide
  1. Valve face distinctly arched
  2. Striae robust
  3. Axial area lanceolate
  4. Striae multiseriate

The valve face is distinctly arched. Striae are robust and multiseriate. The axial area is lanceolate and wide near the central valve. The central area is round to elongate, 3.2–4.0 μm wide. Areolae are undistinguishable in LM.