Upper Triassic sponges (Sphinctozoa) from southern Yukon, Stikinia terrane ( Canada).

B. Senowbari-Daryan, R. P. Reid

Research output: Contribution to journalArticlepeer-review

13 Scopus citations


The first Tethyan-type Upper Triassic sponge reefs in North America have recently been discovered in the southern Yukon, in Stikinia terrane. Sphinctozoa from these reefs and inter-reef limestones are represented by 18 species and 12 genera belonging to six families. The genus Yukonella with one species, Y. rigbyi, and the species Polytholosia ramosa and Polycystocoelia norica are described for the first time. Some of the Yukon sponges were previously known only from the Tethyan realm and others, from Tethyan and North American localities. One (Polytholosia cylindrica) is probably endemic to North America. The mixed affinities of the Yukon sponges may reflect the paleogeographic origin of Stikinia as an island in the ancestral Pacific Ocean, between Tethys and the North American craton. -from Authors

Original languageEnglish (US)
Pages (from-to)882-902
Number of pages21
JournalCanadian Journal of Earth Sciences
Issue number5
StatePublished - Jan 1 1987
Externally publishedYes

ASJC Scopus subject areas

  • Earth and Planetary Sciences(all)


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