A new homoiostelean and a new eocrinoid from the Middle Cambrian of Utah A new homoiostelean and a new eocrinoid from the Middle Cambrian of Utah
Le genre Ceratocystis Jaekel (Echinodermata, Stylophora) Le genre Ceratocystis Jaekel (Echinodermata, Stylophora)
Aethocrinus moorei Ubaghs, n. gen., n. sp., le plus ancien crinoide dicyclique connu Aethocrinus moorei Ubaghs, n. gen., n. sp., le plus ancien crinoide dicyclique connu
Homalozoan echinoderms of the Wheeler Formation (Middle Cambrian) of western Utah Homalozoan echinoderms of the Wheeler Formation (Middle Cambrian) of western Utah