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Guide to Staurosirella leptostauron var. dubia

(Grunow) Edlund 1994

Staurosirella Leptostauron Dubia Guide
Credit: Eduardo Morales
  1. Valves lanceolate to elliptical
  2. Areolae lineolate
  3. Costae wider than striae
  4. Spines reduced, two per costae

Valves of S. leptostauron var. dubia are lanceolate to elliptical with rounded ends in smaller specimens. The distinct, broad striae are composed of lineolate areolae. Costae tend to be wider than striae. Spines are solid and reduced compared to other Staurosirella taxa. Two spines are present for each costa.