†order Plakinida Reid 1968 (demosponge)
Parent taxon: Choristida according to R. M. Finks et al. 2004
Sister taxa: Ancorinida, Arthaberia, Cephaloraphiditidae, Craniellida, Fusiferella, Helminthophyllidae, Pachastrellida, Scolioraphididae, Ungulaspongia
Subtaxa: Acanthastrellidae Plakinidae
Ecology: stationary intermediate-level epifaunal suspension feeder
Distribution:
• Jurassic of Portugal (2 collections)
Total: 2 collections each including a single occurrence