Palaeontographica Canadiana No. 16: Silurian (Wenlock) demosponges from the Avalanche Lake area of the Mackenzie Mountains, southwestern District of Mackenzie, Northwest Territories, Canada.
Palaeontographica Canadiana No. 16: Silurian (Wenlock) demosponges from the Avalanche Lake area of the Mackenzie Mountains, southwestern District of Mackenzie, Northwest Territories, Canada.
Platform-margin strata of the Avalanche Lake area in the Mackenzie Mountains of the Northwest Territories have yielded a fabulous diversity of silicified and non-silicified fossils, including Silurian (Wenlock) sponges. The demosponges include a new epipolasid species, an abundant and diverse group of anthaspidellid orchocladines, and a rhizomorine. Three orchocladines are identified as new species. The faunas also include astylospongiid sphaerocladines, a tricranocladine lithistid, and permosphinctid demosponges.