District of Mackenzie Ceraurus mackenziensis zone: Edenian, Canada

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
Nematoporida indet.
Ostracoda - Beyrichicopida - Bolliidae
Dicranella bicornis
Ostracoda - Hollinocopida - Oepikellidae
Oepikella labrosa
Ostracoda - Hollinocopida - Eurychilinidae
Eurychilina prairiensis
Ostracoda - Hollinocopida - Oepikiumidae
Oepikium sp. Agnew 1942
Ostracoda - Hollinocopida - Tvaerenellidae
Diplopsis socialis Levinson 1961
Ostracoda - Hollinocopida - Tetradellidae
? Tetradella sp. Ulrich 1890
Ceratopsis quadrifida
Ostracoda - Leperditellocopida - Schmidtellidae
Schmidtella affinis
Ostracoda - Leperditellocopida - Aparchitidae
Aparchites fimbriatus
"Aparchites"
Ostracoda - Palaeocopida - Lomatopisthiidae
Bolbopisthia sp.
Ostracoda - Palaeocopida - Cryptophyllidae
Milleratia sp.
Ostracoda - Podocopida - Bairdiocyprididae
Bairdiocypris cylindrica
Ostracoda - Podocopida - Bairdiidae
? Krausella cf. acuta
Krausella inaequalis
Trilobita - Phacopida - Encrinuridae
Cybeloides sp. Slocum 1913
Trilobita - Phacopida - Cheiruridae
Ceraurinella brevispina n. sp. Ludvigsen 1979
Ceraurinus serratus n. sp.
Ceraurus mackenziensis n. sp. Ludvigsen 1979
? Acanthoparypha goniopyga n. sp. Ludvigsen 1979
Borealaspis whittakerensis Ludvigsen 1976
Borealaspis biformis Ludvigsen 1976
Sphaerocoryphe robustus Walcott 1875
corrected as Sphaerocoryphe robusta
Trilobita - Phacopida - Pterygometopidae
Calyptaulax sp. Cooper 1930
Eomonorachus sp. Delo 1935
"Eomonorachus"
    = Denella cumera n. sp. Ludvigsen and Chatterton 1982
Ludvigsen and Chatterton 1982
Calyptaulax lincolnensis (Branson 1909)
recombined as Sceptaspis lincolnensis
"Calyptaulax"
Chasmops sp. n. sp. M'Coy 1849
Trilobita - Proetida - Dimeropygidae
Dimeropyge sp. Opik 1937
Trilobita - Proetida - Otarionidae
Otarion cf. trentonensis
Trilobita - Proetida - Proetidae
Cyphoproetus sp. Kegel 1927
Trilobita - Asaphida - Asaphidae
Isotelus sp. Dekay 1824
Anataphrus sp. Whittington 1954
Trilobita - Asaphida - Remopleurididae
Hypodicranotus aff. striatulus (Walcott 1875)
Trilobita - Lichida - Lichidae
Hemiarges cf. leviculus Bradley 1930
Hemiarges cf. paulianus (Clarke 1894)
Trilobita - Harpetida - Harpetidae
Dolichoharpes sp. Whittington 1949
Trilobita - Corynexochida - Illaenidae
Bumastoides sp. (Whittington 1954)
Trilobita - Odontopleurida - Odontopleuridae
Apianurus sp. Whittington 1956
Rhynchonellata - Orthida - Plaesiomyidae
? Plaesiomys sp. Hall and Clarke 1892
Rhynchonellata - Orthida - Orthidae
Boreadorthis sp. Opik 1934
Rhynchonellata - Orthida - Glyptorthidae
Glyptorthis sp. Foerste 1914
Rhynchonellata - Orthida - Hesperorthidae
Hesperorthis sp. Schuchert and Cooper 1931
Rhynchonellata - Orthida - Platystrophiidae
Platystrophia sp. King 1850
Rhynchonellata - Orthida - Dalmanellidae
? Paucicrura sp. Cooper 1956
Rhynchonellata - Atrypida - Anazygidae
Zygospira sp. Hall 1862
Zygospira modesta (Hall 1847)
Zygospira sulcata Howe 1965
Rhynchonellata - Rhynchonellida - Rhynchotrematidae
Rhynchotrema sp. Hall 1860
Lepidocyclus perlamellosus (Whitfield 1878)
recombined as Lepidocyclus perlamellosa
Rhynchonellata - Rhynchonellida - Ancistrorhynchidae
Ancistrorhyncha sp. Ulrich and Cooper 1942
Strophomenata - Strophomenida - Furcitellidae
Oepikina aff. pergibbosa (Foerste 1917)
Megamyonia cf. unicostata (Meek and Worthen 1868)
Strophomenata - Strophomenida - Rafinesquinidae
Rafinesquina cf. sardesoni
Strophomenata - Strophomenida - Strophomenidae
Strophomena fluctuosa Billings 1860
recombined as Nasutimena fluctuosa
Tetraphalerella sp. Wang 1949
Tetraphalerella cooperi Wang 1949
recombined as Strophomena (Tetraphalerella) cooperi
Strophomena sp. Rafinesque and De Blainville 1824
Strophomena planumbona (Hall 1847)
Holtedahlina sulcata (Hall and Clarke 1892)
Strophomena sulcata
Strophomenata - Strophomenida - Sowerbyellidae
Thaerodonta recedens (Sardeson 1892)
Sowerbyella (Thaerodonta) recedens
Sowerbyella sp. Jones 1928
Stenolaemata - Cryptostomata - Escharoporidae
Escharopora sp. Hall 1847
Stenolaemata - Cryptostomata - Ptilodictyidae
Ptilodictya sp. Lonsdale 1839
Stenolaemata - Cryptostomata - Rhinidictyidae
Stictopora sp. Hall 1847
see common names

Geography
Country:Canada State/province:Northwest Territories
Coordinates: 62.0° North, 127.0° West (view map)
Paleocoordinates:7.5° North, 57.8° West
Basis of coordinate:estimated from map
Geographic resolution:basin
Time
Period:Ordovician Epoch:Late/Upper Ordovician
Stage:Katian 10 m.y. bin:Ordovician 5
*Period:Late/Upper Ordovician *Epoch:Caradoc
*Local age/stage:Kirkfieldian - Shermanian
Key time interval:Edenian Trilobite zone: Ceraurus mackenziensis
Age range of interval:451.10000 - 450.40000 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Formation:Whittaker
Stratigraphic resolution:formation
Stratigraphy comments: Originally given as Kirkfieldian to Shermanian. Was given as Ceraurus mackenziensis member.
Lithology and environment
Primary lithology:gray lithified argillaceous "limestone"
Lithology description: thinly bedded, dark grey and argillaceous limestones
Environment:deep subtidal indet. Tectonic setting:passive margin
Geology comments: Environmental and Tectonic Setting calls by S.M. Holland
Taphonomy
Modes of preservation:body,replaced with silica
Size of fossils:macrofossils
Collection methods and comments
Collection methods:bulk,chemical,field collection
Reason for describing collection:biostratigraphic analysis
Metadata
Database number:24636
Authorizer:S. Holland, P. Wagner Enterer:S. Holland, P. Wagner
Modifier:P. Wagner Research group:marine invertebrate
Created:2002-08-12 16:54:55 Last modified:2021-12-28 15:11:24
Access level:the public Released:2002-08-12 16:54:55
Creative Commons license:CC BY
Reference information

Primary reference:
6928. R. Ludvigsen. 1979. A trilobite zonation of Middle Ordovician rocks, southwestern District of Mackenzie. Geological Survey of Canada Bulletin 312:1-98 [S. Holland/S. Holland/J. Ju]

Secondary references:

55610 R. Ludvigsen and B. D. E. Chatterton. 1982. Ordovician Pterygometopidae (Trilobita) of North America. Canadian Journal of Earth Sciences 19:2179-2206 [M. Hopkins/M. Hopkins]