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A systematic reappraisal and quantitative study of the nonmarine teleost fishes from the late Maastrichtian of the Western Interior of North America; evidence from vertebrate microfossil localities

Donald B. Brinkman, Julien D. Divay, David G. DeMar and Gregory P. Wilson Mantilla
A systematic reappraisal and quantitative study of the nonmarine teleost fishes from the late Maastrichtian of the Western Interior of North America; evidence from vertebrate microfossil localities (in New Mesozoic research inspired by the life and work of Dale A. Russell, Jordan C. Mallon (editor), Philip J. Currie (editor) and Kathlyn M. Stewart (editor))
Canadian Journal of Earth Sciences = Revue Canadienne des Sciences de la Terre (September 2021) 58 (9): 936-967

Abstract

The diversity and distribution of nonmarine teleost fishes in the Western Interior of North America during the late Maastrichtian is documented based on isolated elements from vertebrate microfossil localities in the Hell Creek Formation of Montana, the Lance Formation of Wyoming, and the Scollard Formation of Alberta. A minimum of 20 taxa are recognized based on >1900 abdominal centra and tooth-bearing elements. These include two elopomorphs, six osteoglossomorphs, three ostariophysans, one esocid, six acanthomorphs, and two taxa of unknown relationships. These assemblages differ from late Campanian assemblages in the absence of the Clupeomorpha and the presence of the Perciformes. Within the Hell Creek Formation, we record patterns in the relative abundances of the most abundant taxa leading up to the Cretaceous-Paleogene (K-Pg) boundary. Most notably, acanthomorphs increased in abundance upsection, whereas a group of osteoglossomorphs, represented by Coriops and (or) Lopadichthys, concurrently decreased in abundance. Conversely, some teleosts exhibited more stable or slightly fluctuating relative abundances throughout the formation (Wilsonichthyidae, Esocidae). These late Maastrichtian teleost assemblages are of higher diversity than an early Eocene assemblage from Wyoming preserved under similar taphonomic conditions. This pattern suggests either that lower Cenozoic deposits in the Western Interior are insufficiently sampled or that the K-Pg mass extinction event adversely affected nonmarine teleosts.


ISSN: 0008-4077
EISSN: 1480-3313
Coden: CJESAP
Serial Title: Canadian Journal of Earth Sciences = Revue Canadienne des Sciences de la Terre
Serial Volume: 58
Serial Issue: 9
Title: A systematic reappraisal and quantitative study of the nonmarine teleost fishes from the late Maastrichtian of the Western Interior of North America; evidence from vertebrate microfossil localities
Title: New Mesozoic research inspired by the life and work of Dale A. Russell
Author(s): Brinkman, Donald B.Divay, Julien D.DeMar, David G., Jr.Wilson Mantilla, Gregory P.
Author(s): Mallon, Jordan C.editor
Author(s): Currie, Philip J.editor
Author(s): Stewart, Kathlyn M.editor
Affiliation: Royal Tyrrell Museum of Palaeontology, Drumheller, AB, Canada
Affiliation: Canadian Museum of Nature, Beaty Centre for Species Discovery, Ottawa, ON, Canada
Pages: 936-967
Published: 202109
Text Language: English
Summary Language: French
Publisher: National Research Council of Canada, Ottawa, ON, Canada
References: 101
Accession Number: 2021-066050
Categories: Vertebrate paleontology
Document Type: Serial
Bibliographic Level: Analytic
Annotation: Includes appendix
Illustration Description: illus. incl. 1 plate, 2 tables, sketch map
N42°34'60" - N43°25'00", W104°55'00" - W104°04'60"
N51°00'00" - N51°00'00", W112°00'00" - W112°00'00"
N46°52'60" - N47°58'00", W107°57'00" - W106°04'60"
Secondary Affiliation: Smithsonian Institution, National Museum of Natural History, USA, United StatesUniversity of Washington at Seattle, USA, United States
Country of Publication: Canada
Secondary Affiliation: GeoRef, Copyright 2021, American Geosciences Institute. Reference includes data from Canadian Science Publishing, NRC Research Press, Ottawa, ON, Canada. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 202121
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