Subfamily Tretodictyinae Schulze 1887 (glass sponge)
Hexactinellida - Hexactinosa - Tretodictyidae
Parent taxon: Tretodictyidae according to R. M. Finks et al. 2004
Sister taxa: Anomochone, Placotrematinae
Subtaxa: Auloplax Hexactinella Prohexactinella Psilocalyx Ramalmerina Sclerothamnopsis Tretodictyum
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)
• Cretaceous to Paleogene of New Zealand (1)
• Cretaceous of France (4), Germany (1), the United Kingdom (1)
• Jurassic of India (1)
Total: 18 collections including 24 occurrences