Query: Echinoderms found in North America from the Paleozoic period or animals found in North America from the Pennsylvanian period
Domain: animals
Relevant documents:
Abrotocrinus
Forbesiocrinus
Cyathocrinites
Melonechinus
Archaeocidaris
Delocrinus
Pentremites
Rasstriga
Aglaocrinus
Tullimonstrum
Eucalyptocrinites
Lysorophia