Demospongiae - Tetralithistida - Theonellidae
Parent taxon: Tetracladina according to R. M. Finks et al. 2004
Sister taxa: Astrocladiidae, Chenendoporidae, Phymaraphiniidae, Plinthosellidae, Protetraclisidae, Radiocelliidae, Siphoniidae, Sulcastrella, Vermiculissimum
Subtaxa: Acrochordoniinae Pachycorynea Phymaplectiinae Rhopalospongia Theonellinae Verrucodesma Zitteleus
Type: Theonella
Ecology: stationary epifaunal suspension feeder
Distribution:
• Miocene of Algeria (1 collection), Portugal (1), Spain (4)
• Oligocene of Ukraine (1)
• Eocene of Italy (1), Ukraine (3), United States (2: North Carolina)
• Paleocene to Eocene of New Zealand (1)
• Cretaceous of France (6), Germany (9), Greece (1), Italy (1), North Atlantic (1), Poland (12), the Russian Federation (1), Spain (2)
• Jurassic of North Atlantic (1)
Total: 48 collections including 125 occurrences