District of Mackenzie Ceraurus mackenziensis zone (Ordovician of Canada)

Where: Northwest Territories, Canada (62.0° N, 127.0° W)

• Paleocoordinates: 17.4° N, 111.1° W (Wright 2013)

• coordinate estimated from map

• basin-level geographic resolution

When: Ceraurus mackenziensis trilobite zone, Whittaker Formation, Edenian (451.0 - 450.2 Ma)

• Originally given as Kirkfieldian to Shermanian. Was given as Ceraurus mackenziensis member.

• formation-level stratigraphic resolution

Environment/lithology: deep subtidal; lithified, gray, argillaceous limestone

• Environmental and Tectonic Setting calls by S.M. Holland
• thinly bedded, dark grey and argillaceous limestones

Size class: macrofossils

Preservation: replaced with silica

Collection methods: bulk, chemical,

Primary reference: 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]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 24636: authorized by Steven Holland, entered by Steven Holland on 12.08.2002, edited by Pete Wagner

Creative Commons license: CC0 (CC0)

Taxonomic list

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