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Guide to Karayevia laterostrata

(Hust.) Bukht. 1999

Karayevia Laterostrata Guide
Credit: Marina Potapova
  1. Valves elliptical with capitate to subcapitate apices
  2. Striae on rapheless valve punctate
  3. Striae on raphe valve radiate
  4. Long and short striae alternate in middle part of raphe valve

Valves are elliptical with narrowly capitate to subcapitate apices. The raphe valve has a lanceolate axial area and no distinct central area. Striae on raphe valve are radiate, in the valve center short and long striae alternate, 14-18 in 10 µm. The rapheless valve has a linear axial area and no central area. Striae on rapheless valve are punctate, parallel in the center and slightly radiate at apices, 14-18 in 10 µm.