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TitleTortodus dodoensis, a new conodont species, and a Givetian (Middle Devonian) conodont fauna from the northern Mackenzie Mountains, northwest Canada
AuthorGouwy, S AORCID logo; Uyeno, T T; McCracken, A D
SourcePaläontologische Zeitschrift 2019 p. 1-16,
Alt SeriesNatural Resources Canada, Contribution Series 20180120
PublisherSpringer Science and Business Media LLC
Mediapaper; on-line; digital
File formatpdf (Adobe® Reader®); html
ProvinceNorthwest Territories
NTS96C; 96D; 96E; 96F
AreaMackenzie Mountains; Dodo Canyon
Lat/Long WENS-128.0000 -125.0000 65.5000 64.5000
Subjectspaleontology; stratigraphy; Middle Devonian; Givetian; biostratigraphy; micropaleontology; systematic paleontology; taxonomy; fossil descriptions; microfossils; conodonts; faunas; fossil distribution; fossil distribution, strata; fossil zones; fossil assemblages; paleogeography; lithostratigraphy; bedrock geology; lithology; sedimentary rocks; limestones; black shales; Tortodus dodoensis; Polygnathus amphora; Polygnathus denisbriceae; Polygnathus xylus ensensis; Polygnathus pseudoeiflius; Polygnathus linguiformis klapperi s.l.; Polygnathus l. weddigei; Polygnathus parawebbi; Polygnathus pseudofoliatus; Horn River Group; Hare Indian Formation; Bluefish Member; Phanerozoic; Paleozoic; Devonian
Illustrationslocation maps; geoscientific sketch maps; biostratigraphic charts; photographs; stratigraphic columns; photomicrographs
ProgramGEM2: Geo-mapping for Energy and Minerals Mackenzie Corridor, Shield to Selwyn
ProgramIGCP Project 652 - Reading Geologic Time in Paleozoic Sedimentary Rocks
Released2019 07 08
AbstractA new conodont species Tortodus dodoensis sp. nov. from the lower part of the Givetian (Middle Devonian) of the Mackenzie Mountains (NW Canada) is described. This paper also reports the lowest stratigraphic occurrence of a Givetian fauna containing a.o. Polygnathus amphora, P. denisbriceae, P. xylus ensensis, P. pseudoeiflius, P. linguiformis klapperi s.l., P. l. weddigei, P. parawebbi and P. pseudofoliatus from the northern Mackenzie Mountains. This fauna situates the sample in the timorensis to ansatus zones interval, possibly restricting it to the timorensis Zone. This result allows the positioning of the Eifelian-Givetian contact within the lowest 7.5 m of the Hare Indian Formation (Horn River Group) (northern Mackenzie Mountains, NW Territories).
Summary(Plain Language Summary, not published)
This paper describes a new species of conodonts, an extinct microvertebrate that is used in detailed correlation, subdivision and dating of stratigraphic layers in geological research. The research in this paper identified the oldest Givetian (late Middle Devonian) fauna in the northern Mackenzie Mountains (NWT) and allows the positioning of the base of the Givetian Stage in this area.

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