New cheirurinid trilobites from the lower Whittaker Formation (Ordovician), southern Mackenzie Mountains

R. Ludvigsen

1976

Article

Canadian Journal of Earth Sciences 13(7):947-959

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Taxa discussed in this work:

• Borealaspis biformis
• Borealaspis numitor
• Borealaspis whittakerensis
• Whittakerites
• Whittakerites planatus

Taxonomy:

• Whittakerites planatus belongs to Whittakerites - Ludvigsen (1976)
• Borealaspis whittakerensis belongs to Borealaspis - Ludvigsen (1976)
• Borealaspis biformis belongs to Borealaspis - Ludvigsen (1976)
• Borealaspis numitor belongs to Borealaspis - Ludvigsen (1976)