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The Chadronian mammalian fauna of the Florissant Formation, Florissant Fossil Beds National Monument, Colorado

Karen J. Lloyd, Marie P. Worley-Georg and Jaelyn J. Eberle
The Chadronian mammalian fauna of the Florissant Formation, Florissant Fossil Beds National Monument, Colorado (in Paleontology of the upper Eocene Florissant Formation, Colorado, Herbert W. Meyer (editor) and Dena M. Smith (editor))
Special Paper - Geological Society of America (2008) 435: 117-126

Abstract

During the past five years, renewed prospecting and collecting of mammalian fossils in the Florissant Formation within Florissant Fossil Beds National Monument in central Colorado has nearly tripled the known diversity of fossil mammals from this rock unit. Taxa first recorded here from the Florissant Formation include the eomyid rodent Paradjidaumo trilophus, the lagomorph Palaeolagus, and the rare artiodactyl Pseudoprotoceras longinaris. We also describe an isolated deciduous premolar of a protoceratid. We update the mammalian faunal list of the Florissant Formation, which includes some 16 species in 13 families and 6 orders. The mammalian fauna corroborates the Chadronian (latest. Eocene) age determined by others. Geographic ranges of Pelycomys, Palaeolagus, and Paradjidaumo trilophus are extended slightly southwest from northeastern Colorado, and the range of Pseudoprotoceras longinaris is extended southwest from Wyoming and Nebraska. Based upon comparison with nearest living relatives and plausible analogs, the mammalian taxa represented in the Florissant Formation seem to be consistent with the moist, warm temperate, relatively high elevation wetland and woodland habitats that have been inferred by others for the area in and around late Eocene Lake Florissant.


ISSN: 0072-1077
EISSN: 2331-219X
Coden: GSAPAZ
Serial Title: Special Paper - Geological Society of America
Serial Volume: 435
Title: The Chadronian mammalian fauna of the Florissant Formation, Florissant Fossil Beds National Monument, Colorado
Title: Paleontology of the upper Eocene Florissant Formation, Colorado
Author(s): Lloyd, Karen J.Worley-Georg, Marie P.Eberle, Jaelyn J.
Author(s): Meyer, Herbert W.editor
Author(s): Smith, Dena M.editor
Affiliation: University of Colorado at Boulder, Department of Geological Sciences, Boulder, CO, United States
Affiliation: National Park Service, Florissant Fossil Beds National Monument, Florissant, CO, United States
Pages: 117-126
Published: 2008
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
ISBN: 978-0-8137-2435-5
References: 65
Accession Number: 2008-109809
Categories: Vertebrate paleontology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 4 tables, geol. sketch map
N38°55'00" - N38°55'00", W105°16'00" - W105°16'00"
Secondary Affiliation: University of Colorado at Boulder, USA, United States
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute.
Update Code: 200840
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