Family Trissocyclidae Goll 1968
Polycystinea - Nassellaria - Trissocyclidae
Parent taxon: Spyrida according to B. O'Conner 1994
See also Goll 1968
Sister taxa: none
Subtaxa: Acanthodesmia Cantharospyris Nephrospyris Phormospyris Tholospyris
Distribution:
• NN21 of North Pacific (5 collections)
• Quaternary of North Pacific (49), Southern Ocean (1)
• Pliocene to Pleistocene of North Pacific (4)
• Pliocene of North Pacific (21), Southern Ocean (1)
• Miocene to Pliocene of North Pacific (1)
• Miocene of North Pacific (4), Southern Ocean (2)
• Oligocene of North Pacific (60)
• Eocene to Oligocene of North Pacific (32)
• Eocene of North Pacific (86), Peru (1), South Pacific (14)
• Jurassic of the Russian Federation (1)
Total: 282 collections including 300 occurrences