Neidium iridis f. vernalis Reichelt ex Hustedt





Collection 1159

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Authority information

Reichelt ex Hustedt 1930 (VanLandingham 1978).

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This image was taken utilizing DIC for the specimen above.

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This taxon approximates the concept of (Hustedt (1930) in figure 380. There is some question as to the true identity of this taxon because it doesn't have parallel sides. It has slight, weakly developed undulations of the sides. We differ from Krammer and Lange-Bertalot (1985,1986) in that our specimen shows a scythe proximal raphe end instead of a crochet hook end in the marginal character, and the areolae are more finely structured ( Hudstedt 1930).

Size ranges and morphology

  • Length is 68 to 80 micrometers ( Hudstedt 1930).
  • Width is 13.5 to 15 micrometers ( Hudstedt 1930).
  • Striae are 18 to 22 in 10 micrometers ( Hudstedt 1930).
  • Puncta are around 24 to 28 in 10 micrometers ( Hudstedt 1930).