The mid-Cambrian (Drumian; Marjuman) trilobites 'Athabaskiella' Kobayashi 1942 and 'Bathyuriscidella' Rasetti 1948 (Dolichometopidae) from Quebec and Newfoundland, eastern Canada

'Athabaskiella' and 'Bathyuriscidella' comprise a distinctive set of dolichometopid species that share a relatively short palpebral lobe and a bacula opposite the L1 glabellar lobe. Almost all of these species are known from allochthonous boulders in debris flow conglomerates that accumulated along the Quebec Embayment and the St. Lawrence Promontory of the Laurentian continental margin. We revise both genera from a study of type material from the Grosses-Roches Formation, Quebec, and undescribed collections from the Shallow Bay Formation, western Newfoundland. A phylogenetic analysis supports monophyly of both 'Athabaskiella' and 'Bathyuriscidella', and also reveals a new clade, Rasettiella gen. nov., which includes species previous assigned to 'Bathyuriscidella. Rasettiella lupiae' and 'Rasettiella sorgehanarum' are new. Species from Quebec are poorly constrained biostratigraphically, but associated agnostoid arthropods place species from Newfoundland mostly in the 'Ptychagnostus atavus' and/or 'P. punctuosus' zones.