Diatoms of North AmericaDiatoms of North America
Return to overview

Guide to Rossithidium anastasiae

(Kaczmarska) Potapova 2012

Rossithidium Anastasiae Guide
Credit: Marina Potapova
  1. Valve linear to linear-elliptic
  2. Raphe straight
  3. Striae unseriate
  4. Raphe valve with a small or indisctinct central area
  5. Rapheless valve with a narrow linear axial area

Valves are linear or linear-elliptic with rounded ends. The raphe valve has a linear axial area that gradually widens into a small or almost indistinct central area. The rapheless valve has a narrow, linear axial area and no distinct central area. Striae are uniseriate and slightly radiate.