Skabitschewskia Peragalloi Guide
  1. Valve apices subrostrate to subcapitate
  2. Rapheless valve with wide cavum
  3. Raphe valve with bowtie-shaped central area
  4. Striae much denser of raphe valve than on rapheless valve

Valves are elliptic-lanceolate with subrostrate to subcapitate apices. The raphe valve has a wide, bowtie-shaped central area. The striae on the raphe valve are strongly radiate, much denser than striae on rapheless valve. The rapheless valve has a wide cavum.