Fauna j, Section DR, Delorme Fm., Mackenzie Mts.: Whitwellian, Canada
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Trilobita
- Phacopida
- Encrinuridae
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Struszia (Struszia) dimitrovi
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Edgecombe and Chatterton 1993 | |||||||||
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Encrinurus speyeri n. sp.
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Edgecombe and Chatterton 1993 | |||||||||
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Trilobita
- Phacopida
- Cheiruridae
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Deiphon braybrooki
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Chatterton and Perry 1984 | |||||||||
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Hyrokybe lenzi
Chatterton and Perry 1984
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Chatterton and Perry 1984 | |||||||||
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Hyrokybe copelandi
(Perry and Chatterton 1979)
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Chatterton and Perry 1984 | |||||||||
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Hadromeros scotti
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Chatterton and Perry 1984 | |||||||||
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Sphaerexochus dimorphus
Whittington and Evitt 1953
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Chatterton and Perry 1984 | |||||||||
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Contracheirurus sp. n. sp.
Chatterton and Perry 1984
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Chatterton and Perry 1984 | |||||||||
| n. sp. A | ||||||||||
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Trilobita
- Phacopida
- Calymenidae
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Diacalymene gabrielsi
Siveter and Chatterton 1996
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Siveter and Chatterton 1996 | |||||||||
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? Gravicalymene sp.
Shirley 1936
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Siveter and Chatterton 1996 | |||||||||
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Trilobita
- Proetida
- Otarionidae
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Otarion huddyi n. sp.
Adrain and Chatterton 1994
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Adrain and Chatterton 1994 | |||||||||
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Trilobita
- Lichida
- Lichidae
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Dicranogmus lepidus
Campbell and Chatterton 2006
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Campbell and Chatterton 2006 | |||||||||
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Borealarges variabilis
Campbell and Chatterton 2007
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Campbell and Chatterton 2007 | |||||||||
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Borealarges tuckerae
Adrain 1994
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Campbell and Chatterton 2007 | |||||||||
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Trilobita
- Odontopleurida
- Odontopleuridae
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Ceratocephala plummeri
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Ceratocephalina sevastopuloi
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| original and current combination Ceratocephala (Ceratocephalina) | ||||||||||
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Xanionurus norfordi
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| synonym of Radiaspis | ||||||||||
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Acidaspis jessi
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Leonaspis lenzi
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Dudleyaspis rutteri
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| see common names | ||||||||||
Geography
| Country: | Canada | State/province: | Northwest Territories |
| Coordinates: | 62.8° North, 125.3° West (view map) | ||
| Paleocoordinates: | 4.2° North, 48.5° West | ||
| Basis of coordinate: | estimated from map | ||
| Geographic resolution: | outcrop |
Time
| Period: | Silurian | ||
| 10 m.y. bin: | Silurian 2 | *Epoch: | Early/Lower Wenlock |
| Key time interval: | Whitwellian | Zone: | Kockelella patula |
| Age range of interval: | 430.50000 - 429.70000 m.y. ago | ||
| * legacy (obsolete) database fields | |||
Stratigraphy
| Formation: | Delorme | ||||
| Stratigraphic resolution: | group of beds | ||||
| Stratigraphy comments: Zonation based on conodonts present in AV sections 1, 2, and 4. (AV 3 and DR sections correlated with these on basis of trilobite faunal assemblages.) | |||||
Lithology and environment
| Primary lithology: | argillaceous "limestone" | ||
| Secondary lithology: | "shale" | ||
| Lithology description: "...sequence of buff and light brown weathering, thinly bedded limestones, dolomites and shales that overlie the Whittaker Formation and underlie the Camsell Formation...The beds above and including a distinctive buff-brown shale unit in the sections near Avalanche Lake are included in the Delorme Formation in this work, although the lowest buff-brown shaly beds (below distinctive orange coloured limestones and dolomites) could be regarded as transitional between the Road River and Delorme..." | |||
| Environment: | slope | Tectonic setting: | passive margin |
| Glacial or sequence phase: | highstand systems tract | ||
| Geology comments: Grand Cycle 3.
SEP environmental call based on given information | |||
Taphonomy
| Modes of preservation: | replaced with silica |
| Size of fossils: | macrofossils |
Collection methods and comments
| Collection excludes: | some macrofossils |
| Reason for describing collection: | taxonomic analysis |
Metadata
| Database number: | 26050 | ||
| Authorizer: | M. Foote, M. Hopkins | Enterer: | M. Foote, M. Hopkins |
| Modifier: | M. Uhen | Research group: | marine invertebrate |
| Created: | 2002-10-01 10:40:42 | Last modified: | 2018-11-18 14:54:31 |
| Access level: | the public | Released: | 2002-10-01 10:40:42 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 7215. | B. D. E. Chatterton and D. G. Perry. 1983. Silicified Silurian odontopleurid trilobites from the Mackenzie Mountains. Palaeontographica Canadiana 1:1-55 [M. Foote/M. Foote/M. Foote] |
Secondary references:
| 7226 | J. M. Adrain and B. D. E. Chatterton. 1994. The aulacopleurid trilobite Otarion, with new species from the Silurian of northwestern Canada. Journal of Paleontology 68(2):305-323 [M. Foote/M. Foote/M. Foote] | |
| 63116 | M. J. Campbell and B. D. E. Chatterton. 2006. Late Ordovician and Silurian lichid trilobites from northwestern Canada: eight new species from subfamilies Lichinae, Platylichinae, and Trochurinae. Journal of Paleontology 80(3):514-528 [M. Hopkins/M. Hopkins] | |
| 25908 | M. J. Campbell and B. D. E. Chatterton. 2007. Late Ordovician and Silurian lichid trilobites from Northwestern Canada: Hemiarges, Borealarges, and Richterarges. Journal of Paleontology 81(6):1348-1364 [P. Wagner/P. Wagner/P. Wagner] | |
| 7216 | B. D. E. Chatterton and D. G. Perry. 1984. Silurian cheirurid trilobites from the Mackenzie Mountains, northwestern Canada. Palaeontographica Abteilung A 184(1-4):1-78 [M. Foote/M. Foote/M. Foote] | |
| 7220 | G. D. Edgecombe and B. D. E. Chatterton. 1993. Silurian (Wenlock-Ludlow) encrinurine trilobites from the Mackenzie Mountains, Canada, and related species. Palaeontographica Abteilung A 229(4-6):75-112 [M. Foote/M. Foote/M. Foote] | |
| 7217 | D. J. Siveter and B. D. E. Chatterton. 1996. Silicified calymenid trilobites from the Mackenzie Mountains, northwest Canada. Palaeontographica Abteilung A 239(1-3):43-60 [M. Foote/M. Foote/M. Foote] |