Query: Invertebrates or African animals from the Ordovician period, or sponge families from the prehistoric times
Domain: animals
Relevant documents:
Paropsonemid
Soomaspis
Palaeoconchus
Graptolithina
Hallirhoidae
Hazeliidae
Tymbochoos
Eiffeliidae
Paracrinoidea
Scenella
Notiodella
Cothurnocystis
Stromatoporoidea
Blastoid
Bothriocidaris
Tetragraptus approximatus
Didymograptus
Tetragraptus