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Guide to Cocconeis grovei

A. Schmidt 1894

Cocconeis Grovei Guide2
  1. Raphe valve with hyaline ring
  2. Rapheless valve with stria density of 7-11 in 10 µm
  3. Valve length to width ratio 1.3-1.7

Valves are large, 51-77 µm. The raphe valve has a hyaline ring that separates a marginal striated area from an inner striated area. The rapheless valve has 7-11 areolae in 10 µm. The valve length to width ratio is 1.3-1.7.