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Guide to Staurosirella leptostauron

(Ehrenb.) D.M.Williams and Round 1987

Staurosirella Leptostauron Guide
Credit: Eduardo Morales
  1. Valves cruciform
  2. Striae wide
  3. Spines positioned on costae

Valves are cruciform with rounded ends. Striae are wide, formed by lineolate striae. Costae are narrower than striae. Spines are flat near the base, and spatulate toward the ends. Spines are solid and positioned on the costae. Two distinct porefields are present at each apex.