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Permanent link (DOI): https://doi.org/10.7939/R3VH8T

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Description of new species of Osteostraci from the Man On The Hill locality, Northwest Territories, Canada, with consideration of the phylogenetic and biogeographic significance of the new taxa Open Access

Descriptions

Other title
Subject/Keyword
Agnatha
Canada
Osteostraci
cephalaspid
Early Devonian
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
Scott, Bradley
Supervisor and department
Wilson, Mark (Biological Sciences)
Examining committee member and department
Murray, Alison (Biological Sciences)
Chatterton, Brian (Earth and Atmospheric Sciences)
Department
Department of Biological Sciences
Specialization

Date accepted
2011-09-28T15:00:47Z
Graduation date
2011-11
Degree
Master of Science
Degree level
Master's
Abstract
The Lochkovian (Lower Devonian) Man on the Hill (MOTH ) locality, Northwest Territories, Canada, is a Konservat-Lagerstätte, where articulated early vertebrate remains are found. Among the early vertebrates preserved at the MOTH locality are the Osteostraci. Many specimens of osteostracan have been recovered since the last descriptions of osteostracan material from MOTH. New species of osteostracan are described here, including five new genera. The new taxa are examined in a phylogenetic analysis that includes most of the genera of the Osteostraci. The topology recovered was then used to reconstruct the ancestral biogeographic distributions of osteostracans. Of particular interest among the new taxa is a new family that includes Superciliaspis, and a primitive non-cornuate osteostracan. The new osteostracans support dispersal from Spitsbergen, Norway into MOTH with a specimen of Machairaspis, and the presence of Waengsjoeaspis at both localities, but all of the species, including six genera, are endemic to MOTH.
Language
English
DOI
doi:10.7939/R3VH8T
Rights
License granted by Bradley Scott (brscott@ualberta.ca) on 2011-09-27T17:51:13Z (GMT): Permission is hereby granted to the University of Alberta Libraries to reproduce single copies of this thesis and to lend or sell such copies for private, scholarly or scientific research purposes only. Where the thesis is converted to, or otherwise made available in digital form, the University of Alberta will advise potential users of the thesis of the above terms. The author reserves all other publication and other rights in association with the copyright in the thesis, and except as herein provided, neither the thesis nor any substantial portion thereof may be printed or otherwise reproduced in any material form whatsoever without the author's prior written permission.
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