Aulacopleurine trilobites from the Llandovery of northwestern Canada

• Published in: Journal of Paleontology
• Main Authors: Adrain, J. M., Chatterton, B. D. E.
• Format: Article in Journal/Newspaper
• Language: English
• Published: Cambridge University Press (CUP) 1995
• Subjects: Mackenzie mountains; Northwest Territories
• Online Access: http://dx.doi.org/10.1017/s002233600003465x; https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S002233600003465X

Aulacopleurine trilobites from Llandovery strata of the Whittaker Formation in the central Mackenzie Mountains, Northwest Territories, Canada, include Aulacopleura andersoni n. sp., Aulacopleura ? ranfordi n. sp., and Songkania smithi n. sp. The subfamily Aulacopleurinae consists of only the genera Aulacopleura Hawle and Corda, 1847, and Songkania Chang, 1974, characterized by smooth, broad early growth stages and holaspides having expanded frontal and genal areas, covered with dense caecal pits, but usually very subdued tuberculate sculpture. The relationship of Aulacopleura? ranfordi and A.? reedi Přibyl, 1947, to the remainder of species assigned to the genus is ambiguous.