Diatoms of North AmericaDiatoms of North America
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Guide to Semiorbis eliasiae

Edlund, D.R.L.Burge, N.A.Andresen and VanderMeulen 2021

Semiorbis eliaseae guide
  1. Valves strongly arched
  2. Transapical costae present
  3. Apices rostrate

Valves are strongly arched, with rostrate apices. Transapical costae are conspicuous, and terminate in short, flat spines at the valve face-mantle junction.