Selection: genus Arthrotus/Dercetina Arthrotus/Dercetina sp. 25 'pale' Arthrotus/Dercetina sp. 25 'dark' Arthrotus/Dercetina sp. 2c Arthrotus/Dercetina sp. 22 Arthrotus/Dercetina sp. 37 'dark' Arthrotus/Dercetina sp. 37 'intermediate'
