Family Sethophormididae Haeckel 1881
Polycystinea - Nassellaria - Sethophormididae
Parent taxon: Acanthodesmiacea according to P. De Wever et al. 2001
Sister taxa: Acanthodesmiidae, Artostrobiidae, Bulbocyrtiidae, Cannobotryidae, Carpocaniidae, Cuniculiformidae, Monicastericidae, Paratympanidae, Planispinocyrtiidae, Pterocorythidae, Rotaformidae, Spongolophophenidae, Spongosilicarmigeridae, Stephaniidae, Theopiliidae, Triospyrididae
Subtaxa: Enneaphormis Protoscenium Sethophormis Velicucullus
Distribution:
• Quaternary of Southern Ocean (3 collections)
• Miocene of Southern Ocean (7)
Total: 10 collections each including a single occurrence