Cuvier, 1804
Solitary zooids: up to 52 mm long (Salpa fusiformis). Test entirely smooth. MI to MIII strongly fused over a wide area in the mid-dorsal region; MVIII to MIX likewise strongly fused. Number of muscular fibers of MIV: 14-40.
Aggregate zooids: up to 52 mm long, excluding projections (Salpa fusiformis 1). Test entirely smooth. MI to MIV and MV to MVI strongly fused in the mid-dorsal region; MIV to MV fused laterally. Number of muscular fibers (MI-MVI): 25-68.