Subgenus
Tetrada (Neotsitrella) Sarv, 1963
| Images | ||||||
|---|---|---|---|---|---|---|
| GIT 138-292 | Tetrada (Perplana) longata | Tsitrella longata | Keila Stage | holotype | |||
| GIT 138-293 | Tetrada (Perplana) longata | Tsitrella longata | Keila Stage | ||||
| GIT 138-294 | Tetrada (Perplana) longata | Tsitrella longata | Keila Stage | ||||
| GIT 138-295 | Tetrada (Perplana) longata | Tsitrella longata | Keila Stage | ||||
| GIT 270-85 | Tetrada (Perplana) longata | Tetrada (Neotsitrella) longata (Sarv, 1959) | 133.7 | Keila Stage |