Hexactinellida - Hexactinosa - Tretodictyidae
Parent taxon: Hexactinosa according to R. M. Finks et al. 2004
See also Worheide et al. 2012
Sister taxa: Aphrocallistidae, Aulocalycidae, Auloplacidae, Caesaria, Carinthiaspongus, Caseispongia, Clavularia, Cribrospongiidae, Cystispongiidae, Emplocidae, Euretidae, Euryplegmatidae, Farreidae, Furcicanalis, Idiodictyon, Imbricareola, Laocaetis, Misonia, Multiloqua, Mysterium, Octobrum, Pileolitoidea, Pillaraspongioidea, Polysyge, Porospongia, Rhogostomium, Rhombedonium, Scopularia, Scotospongia, Staurodermatidae, Tesselispongia, Tremaphorus, Vermifistula, Xenoschrammenus
Subtaxa: Anomochone Placotrematinae Tretodictyinae
Ecology: stationary epifaunal suspension feeder
Distribution:
• Miocene of Spain (2 collections)
• Oligocene of United States (1: Washington)
• Eocene of Italy (1), Spain (5)
• Paleocene to Eocene of New Zealand (1)
• Paleocene of New Zealand (1)
• Cretaceous to Paleogene of New Zealand (1)
• Cretaceous of France (4), Germany (1), the United Kingdom (2)
• Jurassic of India (1)
Total: 20 collections including 29 occurrences