[organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Superclass Tunicata Cuvier
     Class Thaliacea van der Haeven, 1850 - salps
       Family Pyrosomatidae Lahille, 1888
         Genus Pyrostremma Garstang, 1929
           1 Pyrostremma agassizi (Ritter & Byxbee, 1905)
           2 Pyrostremma spinosum (Herdman, 1888)
           2.0.1 Pyrosoma sedentarum Sebastian, 1971 see Pyrostremma spinosum (Herdman, 1888)
           2.0.2 Pyrosoma spinosum Herdman, 1888 see Pyrostremma spinosum (Herdman, 1888)