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Tetractinella trigonella Schlotheim 1820 (lamp shell)

Rhynchonellata - Athyridida - Diplospirellidae

PaleoDB taxon number: 139582

Alternative combinations: Spirigera trigonella, Terebratulites trigonellus

Belongs to Tetractinella according to J. Palfy 2003

Sister taxa: Tetractinella didymoctenia, Tetractinella dyactis, Tetractinella quadricostata, Tetractinella tetractis

Ecology: stationary low-level epifaunal suspension feeder

Average measurements (in mm): shell 15.5 x 15.8, valve 14.4 x 15.4