Guide to Geissleria lateropunctata
Credit: Marina Potapova
- Valves elliptical-lanceolate with narrowly rostrate or subrostrate apices
- Central area formed by one shortened stria at each side
- One to five isolated areolae in central area
- Annulae in three or four rows at poles
Valves are elliptical-lanceolate, often slightly dorsiventral, with narrowly rostrate or subrostrate ends, 7.0-9.0 µm wide and 15-25 µm long. The central area is small, with one to five isolated areolae. Striae are radiate, and number 18-22 in 10 µm. The annulae form three-four rows at each pole.