Query: Ordovician animals of North America or Late Ordovician animals
Domain: animals
Relevant documents:
Astraspida
Eriptychiida
Favosites
Sacabambaspis
Hemithecella
Adamsoceras
Appalachignathus
Astraspis
Acodus
Meniscoceras
Didymograptus
Tymbochoos
Ectenolites
Lunataspis
Najaceras
Clarkoceras
Tetragraptus approximatus
Lingulella
Tetragraptus