Genus

Tetradella Ulrich, 1890

Images
GIT 138-56
Tetradella pulchra | Tetradella pulchra Neckaja, 1952
Nabala Stage
GIT 138-57
Tetradella pulchra | Tetradella pulchra Neckaja, 1952
Nabala Stage
GIT 138-68
Tetradella egorowi | Tetradella egorowi Neckaja, 1952
Nabala Stage
GIT 139-40
Tetradella plicatula | Tetradella plicatula (Krause, 1892)
Porkuni Stage
GIT 139-41
Tetradella plicatula | Tetradella plicatula (Krause, 1892)
Porkuni Stage
GIT 139-42
Tetradella extenuata | Tetradella extenuata Sarv, 1962
90 - 90.03Adavere Stageholotype
GIT 139-43
Tetradella extenuata | Tetradella extenuata Sarv, 1962
90 - 90.03Adavere Stage
GIT 139-44
Tetradella extenuata | Tetradella extenuata Sarv, 1962
78.58 - 78.7Adavere Stage
GIT 139-45
Tetradella extenuata | Tetradella extenuata Sarv, 1962
78.58 - 78.7Adavere Stage
GIT 139-46
Tetradella | Tetradella sp. a Sarv, 1962
90 - 90.03Adavere Stageholotype