New information on two Late Cretaceous (Turonian) fishes from Lac des Bois, Northwest Territories, Canada

• Published in: Vertebrate Anatomy Morphology Palaeontology
• Main Authors: Alison M Murray, Stephen L Cumbaa
• Format: Article in Journal/Newspaper
• Language: English
• Published: University of Alberta Libraries 2015
• Subjects: Cretaceous; Pachyrhizodontidae; Euteleostei; Paleontology; QE701-760; Zoology; QL1-991; Northwest Territories; Canada; Lac des Bois
• Online Access: https://doi.org/10.18435/B5WC7X; https://doaj.org/article/c8819fb9e13c40c49032118acac8aacf

Fishes from Turonian deposits at Lac des Bois, Northwest Territories, Canada, have previously been described based on material from calcareous mudstone concretions collected in 1969. A more recent collecting trip to the locality in 2010 led to the discovery of fossil fishes in a shale layer. These fishes, preserved in a different manner from the earlier collections, provide new information and allow reinterpretations on two previously described fishes, Aquilopiscis wilsoni (Pachyrhizodontidae) and Avitosmerus canadensis (Euteleostei). Although the new material allows a better understanding of these two fishes, it does not change our ideas about their relationships. Avitosmerus canadensis remains in the Euteleostei with relationships uncertain, and Aquilopiscis wilsoni is confirmed as a member of the Pachyrhizodontidae.