Illaenurus zone assemblage: Sunwaptan, Canada
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Agnostida
- Agnostidae
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Micragnostus insolitus
(Grant 1965)
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Trilobita
- Corynexochida
- Missisquoiidae
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Hardyia cf. metion
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Trilobita
- Corynexochida
- Illaenuridae
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Rasettia magna
Bell and Ellinwood 1962
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Trilobita
- Corynexochida
- Illaenidae
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Illaenurus priscus
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Illaenurus holcus n. sp.
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Illaenurus montanensis
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Illaenurus quadratus
Hall 1863
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Trilobita
- Asaphida
- Ptychaspididae
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Kathleenella frontalis
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Idiomesus infimus
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Keithiella cf. intermedia
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Proricephalus scapane
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Trilobita
- Asaphida
- Dikelocephalidae
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Briscoia angustilimba
Westrop 1986
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Briscoia dalyi
(Walcott 1914)
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Princetonella sp.
Lochman 1953
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Monocheilus truncatus
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Dikelocephalus oweni
Ulrich and Resser 1930
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| synonym of Dikelocephalus minnesotensis | |||||||
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Trilobita
- Asaphida
- Eurekiidae
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Corbinia implumis
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Trilobita
- Ptychopariida
- Plethopeltidae
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Plethometopus cf. modestus
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| synonym of Plethopeltis | |||||||
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Trilobita
- Ptychopariida
- Kingstoniidae
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Calvipelta spinosa n. gen., n. sp.
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Clelandia typicalis
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Clelandia briscoensis
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Trilobita
- Ptychopariida
- Catillicephalidae
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? Acheilus oklahomensis
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| replaced by Peracheilus | |||||||
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Acheilops montis n. sp.
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| see common names | |||||||
Geography
| Country: | Canada | State/province: | Alberta |
| Coordinates: | 51.5° North, 116.2° West (view map) | ||
| Paleocoordinates: | 2.8° South, 75.6° West | ||
| Basis of coordinate: | estimated from map | ||
| Geographic resolution: | local area |
Time
| Period: | Cambrian | Epoch: | Furongian |
| 10 m.y. bin: | Cambrian 5 | ||
| Key time interval: | Sunwaptan | Trilobite zone: | Illaenurus |
| Age range of interval: | 493.00000 - 487.50000 m.y. ago |
Stratigraphy
| Formation: | Bison Creek | ||||
| Stratigraphic resolution: | group of beds | ||||
| Stratigraphy comments: top of Bison Creek Formation, ranges into overlying Mistaya Formation. PJW: Top of formation should be Illaenurus zone. | |||||
Lithology and environment
| Primary lithology: | lithified calcareous "shale" | ||
| Secondary lithology: | intraclastic,shelly/skeletal lithified grainstone | ||
| Includes fossils? | Y | ||
| Lithology description: at type section Bison Creek consists of 177m of calcareous shales and mudstones, calcarenites, intrarudites, and algal buildups | |||
| Environment: | peritidal | Tectonic setting: | passive margin |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
Collection methods and comments
| Collection methods: | field collection |
| Reason for describing collection: | biostratigraphic analysis |
Metadata
| Database number: | 54093 | ||
| Authorizer: | S. Peters | Enterer: | S. Peters |
| Modifier: | P. Wagner | Research group: | marine invertebrate |
| Created: | 2005-09-22 15:08:59 | Last modified: | 2024-02-26 17:38:25 |
| Access level: | the public | Released: | 2005-09-22 15:08:59 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 14608. | S. R. Westrop. 1986. Trilobites of the Upper Cambrian Sunwaptan Stage, southern Canadian Rocky Mountains, Alberta. Palaeontographica Canadiana 3:1-179 [S. Peters/S. Peters/U. Merkel] |