Pseudostaurosira Pseudoconstruens Guide
Credit: Thomas C. Smith, Eduardo Morales
  1. Valve shape cruciform
  2. Round to transapically elliptical areolae
  3. Spines aligned with striae
  4. Striae usually restricted to valve margin

Valves are cruciform with round sub-capitate to rostrate apices. The axial area is variable and may be wide to somewhat narrow. Striae are short and weakly radiate to very short and parallel at the apices. Areolae are round to elliptical on the transapical axis and easily distinguishable. Spines are aligned with striae.