Spicatacribra Guide
Credit: Rex Lowe
  1. Valve face flat to slightly domed
  2. Central areolae may be larger than marginal areolae
  3. Marginal fultoportulae present
  4. Areolae coarse

Spicaticribra has a flat, to slightly domed valve face, with a sloping mantle. Marginal fultoportulae are present and 1-3 rimportula. Striae are coarse, radial and straight, with some striae extending from the central valve to the margin, others extending only partially across the valve.

Species in the genus include S. kingstonii Johansen et al., S. kodaikanaliana Karthick and Kociolek and S. rudis (Tremarin et al.) Tuji et al.