Protozoa - Nassellaria - Acanthodesmiidae
Parent taxon: Acanthodesmiacea according to P. De Wever et al. 2001
See also Sharma and Takahashi 2007
Sister taxa: Artostrobiidae, Bulbocyrtiidae, Cannobotryidae, Carpocaniidae, Cuniculiformidae, Monicastericidae, Paratympanidae, Planispinocyrtiidae, Pterocorythidae, Rotaformidae, Sethophormididae, Spongolophophenidae, Spongosilicarmigeridae, Stephaniidae, Theopiliidae, Triospyrididae
Subtaxa: Archicircus Circospyris Dictyospris Dipocoronis Eucoronis Lithocircus Lithotympanum Microcubus Nephrodictyum Paradictyum Perispyris Semantis Triceraspyris Tricolospyris Tricyclidium Trissocyclus Tympanidium Tympaniscus Tympanomma Zygocircus Zygostephanus
Ecology: passively mobile planktonic omnivore
Distribution:
• Quaternary of Japan (7 collections), North Pacific (23), Southern Ocean (3)
• Pliocene of North Pacific (4)
• Miocene to Pliocene of North Pacific (1)
• Miocene of North Pacific (81)
• Oligocene of North Pacific (12)
• Eocene of North Pacific (47)
Total: 178 collections including 182 occurrences