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      • HARVEST
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      Aplodontid, sciurid, castorid, zapodid and geomyoid rodents of the Rodent Hill locality, Cypress Hills formation, southwest Saskatchewan

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      Sean_Bell_Thesis.pdf (5.948Mb)
      Date
      2004-09-24
      Author
      Bell, Sean Daniel
      Type
      Thesis
      Degree Level
      Masters
      Metadata
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      Abstract
      The Rodent Hill Locality is a fossil-bearing site that is part of the Cypress Hills Formation, and is located roughly 15 km northwest of the town of Eastend, Saskatchewan. A number of fossil mammal and other vertebrate taxa are present at Rodent Hill; the primary objective of this project was to identify the fossil rodents of the families Sciuridae, Aplodontidae, Castoridae, Heliscomyidae, Heteromyidae, Florentiamyidae and Zapodidae. These taxa were correlated with rodents from other North American faunas to establish the age of the Rodent Hill Locality. The species Haplomys cf. H. liolophus, Dakotallomys cf. D. pelycomyoides, Kirkomys milleri, Proheteromys nebraskensis, Agnotocastor cf. A. praetereadens, and possibly Cedromus cf. C. wilsoni support the Whitneyan age designation of the Rodent Hill Locality. Taxa that are described from Rodent Hill that are better known from earlier-age sites include Heliscomys vetus and H. hatcheri, Ecclesimus sp. and Oligotheriomys sp. Taxa that are younger than Whitneyan but have been recovered at Rodent Hill include Parallomys sp., Plesiosminthus sp., Protospermophilus sp., and Nototamias sp. Two new species in the genus Sciurion, and one new species in the genus Pseudallomys are described, and a new species of Heliscomys is identified but not formally named. The rodents from the Rodent Hill Locality support the Whitneyan age assignment of the site. This is based on the presence of Whitneyan taxa, and the in situ co-occurrence of older and younger taxa within the site.
      Degree
      Master of Science (M.Sc.)
      Department
      Geological Sciences
      Program
      Geological Sciences
      Supervisor
      Bryant, Harold N.
      Committee
      Renaut, Robin W.; Pratt, Brian R.; de Boer, Dirk H.; Basinger, James F.; Ansdell, Kevin M.; Walker, Ernest G.
      Copyright Date
      September 2004
      URI
      http://hdl.handle.net/10388/etd-12222004-162111
      Subject
      Dakotallomys
      Pseudallomys
      Agnotocastor
      Oligotheriomys
      Palaeocastorinae
      Geomyoidea
      Heliscomyidae
      Heliscomys
      Heliscomys vetus
      Heliscomys hatcheri
      Syphyriomys
      Florentiamyidae
      Kirkomys
      Kirkomys milleri
      Ecclesimus
      Heteromyidae
      Proheteromys
      Proheteromys nebraskensis
      Sciuridae
      Parallomys
      Sciurion
      Castoridae
      Nototamias
      Protospermophilus
      Haplomys
      Campestrallomys
      Prosciurus
      Aplodontidae
      Cedromus
      Plesiosminthus
      Zapodidae
      North America
      Oligocene
      Whitneyan
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