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Article: Triassic echinoids (Echinodermata) from the Aksala Formation, north Lake Laberge, Yukon Territory, Canada

Papers in Palaeontology - Cover Image - Volume 2 Part 1
Publication: Palaeontology
Volume: 2
Part: 1
Publication Date: Febuary 2016
Page(s): 87 100
Author(s): John‐Paul Zonneveld, Carolyn M. Furlong, and Shelby C. Sanders
DOI: 10.1002/spp2.1032
Addition Information

How to Cite

ZONNEVELD, J., FURLONG, C.M., SANDERS, S.C. 2016. Triassic echinoids (Echinodermata) from the Aksala Formation, north Lake Laberge, Yukon Territory, Canada. Papers in Palaeontology, 2, 1, 87-100. DOI: 10.1002/spp2.1032

Author Information

  • John‐Paul Zonneveld - University of Alberta Department of Earth and Atmospheric Sciences Edmonton Alberta Canada (Email: zonnevel@ualberta.ca)
  • Carolyn M. Furlong - University of Alberta Department of Earth and Atmospheric Sciences Edmonton Alberta Canada
  • Shelby C. Sanders - University of Alberta Department of Earth and Atmospheric Sciences Edmonton Alberta Canada

Publication History

  • Issue published online: 13 February 2016
  • Article first published online: 01 January 1970
  • Manuscript Accepted: 14 July 2015
  • Manuscript Received: 12 January 2015

Funded By

NSERC Discovery Grant

Online Version Hosted By

Wiley Online Library
Get Article: Wiley Online Library [Pay-to-View Access] |

Abstract

Late Triassic (Carnian–Norian) echinoids from the Aksala Formation in the Lake Laberge area of the Whitehorse Trough, Yukon Territory, Canada, are described. These echinoids comprise the first description of Triassic echinoids from Canada and, with the exception of fragmentary material from Utah, are the only Upper Triassic echinoids on the western coast of Pangaea north of Peru. Triassicidaris peruviensis Smith is identified from a coronal fragment that consists of an ambulacral column and five attached interambulacral plates from a Carnian outcrop succession. Parvicidaris sp., also from Carnian strata, is identified based on a coronal fragment that consists of two ambulacral and three interambulacral columns. This occurrence extends the range of this typically Norian taxon both north to the Yukon and earlier into the Carnian. Additional specimens, identified as Triassicidaris sp., occur within Norian strata of the Aksala taxa, one of which (‘Cidarislabergensis sp. nov.) is new. Both the corona‐based taxa and the spine form taxa show mixed affinities with Tethyan and southern New World populations and reinforce the association between Triassic echinoid faunas and reefal settings.

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