Key to genera of Tetraliidae

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­ Larger cheliped with setae­filled depression on dorsal, proximal surface of propodus (Plate 1E). Distinct median longitudinal groove on thoracic sternites 4 and 5 ... Tetralia Larger cheliped without setae­filled depression (Plate 2B). Thoracic sternites 4 and 5 entire, without visible median longitudinal groove ..................................... Tetraloides