(Lange-Bert., Nörpel-Schempp and Alles) Lange-Bert. in Metzeltin et al. 2005
Credit: Jana Veselá
Valves arcuate, slender
Valves lightly silicified
Margins parallel
Apices rounded
Valves are slender, arcuate and lightly silicified. Margins are parallel throughout the valve. Apices are rounded with small helictoglossae and short, sometimes indistinct, terminal raphe ends.