Where: Northwest Territories, Canada (62.0° N, 127.0° W: paleocoordinates 7.5° N, 57.8° W)
• 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
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: CC BY (attribution)
Taxonomic list
unclassified | |
Ostracoda | |
Dicranella bicornis ostracod | |
Oepikella labrosa ostracod | |
Eurychilina prairiensis ostracod | |
Oepikium sp. Agnew 1942 ostracod | |
Diplopsis socialis Levinson 1961 ostracod | |
? Tetradella sp. Ulrich 1890 ostracod
Ceratopsis quadrifida ostracod | |
Schmidtella affinis ostracod | |
| |
Bolbopisthia sp. ostracod | |
Milleratia sp. ostracod | |
Bairdiocypris cylindrica ostracod | |
? Krausella cf. acuta ostracod
Krausella inaequalis ostracod | |
Trilobita | |
Cybeloides sp. Slocum 1913 trilobite | |
Ceraurinella brevispina n. sp., Ceraurinus serratus n. sp., Ceraurus mackenziensis n. sp., ? Acanthoparypha goniopyga n. sp., Borealaspis whittakerensis, Borealaspis biformis, "Sphaerocoryphe robustus" = Sphaerocoryphe robusta
Ceraurinella brevispina n. sp. Ludvigsen 1979 trilobite
Ceraurinus serratus n. sp. trilobite
Ceraurus mackenziensis n. sp. Ludvigsen 1979 trilobite
? Acanthoparypha goniopyga n. sp. Ludvigsen 1979 trilobite
Borealaspis whittakerensis Ludvigsen 1976 trilobite
Borealaspis biformis Ludvigsen 1976 trilobite
"Sphaerocoryphe robustus" = Sphaerocoryphe robusta Walcott 1875 trilobite | |
Calyptaulax sp., Denella cumera n. sp., "Calyptaulax lincolnensis" = Sceptaspis lincolnensis, Chasmops sp. n. sp.
Calyptaulax sp. Cooper 1930 trilobite
Chasmops sp. n. sp. M'Coy 1849 trilobite | |
Dimeropyge sp. Opik 1937 trilobite | |
Otarion cf. trentonensis trilobite | |
Cyphoproetus sp. Kegel 1927 trilobite | |
Isotelus sp. Dekay 1824 trilobite
Anataphrus sp. Whittington 1954 trilobite | |
Hypodicranotus aff. striatulus Walcott 1875 trilobite | |
Hemiarges cf. leviculus Bradley 1930 trilobite
Hemiarges cf. paulianus Clarke 1894 trilobite | |
Dolichoharpes sp. Whittington 1949 trilobite | |
Bumastoides sp. Whittington 1954 trilobite | |
Apianurus sp. Whittington 1956 trilobite | |
Rhynchonellata | |
? Plaesiomys sp. Hall and Clarke 1892 | |
Boreadorthis sp. Opik 1934 | |
Glyptorthis sp. Foerste 1914 | |
Hesperorthis sp. Schuchert and Cooper 1931 | |
Platystrophia sp. King 1850 | |
? Paucicrura sp. Cooper 1956 | |
Rhynchotrema sp., "Lepidocyclus perlamellosus" = Lepidocyclus perlamellosa
Rhynchotrema sp. Hall 1860
"Lepidocyclus perlamellosus" = Lepidocyclus perlamellosa Whitfield 1878 | |
Ancistrorhyncha sp. Ulrich and Cooper 1942 | |
Strophomenata | |
Oepikina aff. pergibbosa Foerste 1917
Megamyonia cf. unicostata Meek and Worthen 1868 | |
"Strophomena fluctuosa" = Nasutimena fluctuosa, Tetraphalerella sp., "Tetraphalerella cooperi" = Strophomena (Tetraphalerella) cooperi, Strophomena sp., Strophomena planumbona, Holtedahlina sulcata
"Strophomena fluctuosa" = Nasutimena fluctuosa Billings 1860
Tetraphalerella sp. Wang 1949
"Tetraphalerella cooperi" = Strophomena (Tetraphalerella) cooperi Wang 1949
Strophomena sp. Rafinesque and De Blainville 1824
Strophomena planumbona Hall 1847
Holtedahlina sulcata Hall and Clarke 1892 | |
Sowerbyella sp. Jones 1928 | |
Stenolaemata | |
Escharopora sp. Hall 1847 | |
Ptilodictya sp. Lonsdale 1839 | |
Stictopora sp. Hall 1847 |