Skabitschewskia Oestrupii Guide
  1. Valve apices slightly apiculate
  2. Raphe valve with bowtie-shaped central area
  3. Rapheless valve with cavum
  4. Raphe valve with dense striae

Valves are elliptic-lanceolate, with slightly apiculate apices. The raphe valve has a bowtie-shaped central area. The striae on the raphe valve are strongly radiate and dense. The rapheless valve has a cavum. The striae on the rapheless valve are less dense than on the raphe valve.