Colony entirely smooth of finger-like, oval or oblong habit, often flattened (Pyrosomella verticillata). Size up to 5 cm long and 3 cm in diameter. Colonial wall transparent, colourless and soft. Ascidiozooids with very short oral siphon and short cloacal siphon, never exceeding one third the length of the branchial basket (Pyrosomella verticillata 1).
Collected in South Atlantic Ocean: Pyrosomella verticillata M