District of Mackenzie Ceraurus gabrielsi zone (Ordovician of Canada)

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 gabrielsi trilobite zone, Sunblood, Esbataottine Formation, Blackriveran (457.3 - 449.6 Ma)

• Collection derived from two formations

Environment/lithology: lithified, gray limestone

• Environmental and Tectonic Setting calls by S.M. Holland

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 24631: authorized by Steven Holland, entered by Steven Holland on 12.08.2002, edited by Pete Wagner

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
unclassified
  -
Phylloporinida indet.
Rhynchonellata
 Pentamerida - Camerellidae
Camerella cf. obesa
 Rhynchonellida - Trigonirhynchiidae
Rostricellula sp.
Rostricellula sp. Ulrich and Cooper 1942
 Orthida - Hesperorthidae
Hesperorthis sp.
Hesperorthis sp. Schuchert and Cooper 1931
 Orthida - Plectorthidae
Doleroides sp.
Doleroides sp. Cooper 1930
Strophomenata
 Strophomenida - Furcitellidae
Oepikina sp.
Oepikina sp. Salmon 1942
Stenolaemata
 Cryptostomata - Rhinidictyidae
Stictopora sp.
Stictopora sp. Hall 1847
 Cryptostomata - Ptilodictyidae
Stictoporella sp., Ptilodictya sp.
Stictoporella sp. Ulrich 1882
Ptilodictya sp. Lonsdale 1839
 Cryptostomata - Arthrostylidae
? Helopora sp.
? Helopora sp. Hall 1851
  - Phylloporinidae
Chasmatoporella sp.
Chasmatoporella sp. Nekhoroshev 1936
Trilobita
 Proetida - Bathyuridae
Bathyurus cf. ulu, Bathyurus esbataottinensis n. sp., Bathyurus platyparius n. sp.
Bathyurus cf. ulu Ludvigsen 1979 trilobite
Bathyurus esbataottinensis n. sp. Ludvigsen 1979 trilobite
Bathyurus platyparius n. sp. Ludvigsen 1979 trilobite
 Corynexochida - Illaenidae
Bumastoides sp., Nanillaenus sp.
Bumastoides sp. Whittington 1954 trilobite
Nanillaenus sp. Jaanusson 1954 trilobite
 Lichida - Lichidae
Hemiarges sp., Amphilichas sp.
Hemiarges sp. Gürich 1901 trilobite
Amphilichas sp. Raymond 1905 trilobite
 Asaphida - Remopleurididae
Remopleurides sp.
Remopleurides sp. Portlock 1843 trilobite
 Asaphida - Asaphidae
Isotelus sp.
Isotelus sp. Dekay 1824 trilobite
 Phacopida - Pterygometopidae
Calyptaulax spp.
Calyptaulax spp. Cooper 1930 trilobite
 Phacopida - Cheiruridae
Ceraurus gabrielsi n. sp., Ceraurus blussoni n. sp., Ceraurinella media n. sp.
Ceraurus gabrielsi n. sp. Ludvigsen 1979 trilobite
Ceraurus blussoni n. sp. Ludvigsen 1979 trilobite
Ceraurinella media n. sp. Ludvigsen 1979 trilobite
 Phacopida - Encrinuridae
Cybeloides cimelia, Walencrinuroides rolfi
Cybeloides cimelia Chatterton and Ludvigsen 1976 trilobite
Walencrinuroides rolfi Moss and Westrop 2014 trilobite
Ostracoda
 Beyrichicopida - Bolliidae
Dicranella macrocarinata
 Leperditellocopida - Schmidtellidae
Schmidtella affinis
 Hollinocopida - Tetradellidae
Tetradella perplexa
 Hollinocopida - Oepikellidae
? Oepikella sp.
 Leperditicopida - Isochilinidae
Isochilina cf. gregaria
 Palaeocopida - Cryptophyllidae
Cryptophyllus oboloides
 Palaeocopida - Leperditellidae
Leperditella mundula
 Palaeocopida - Lomatopisthiidae
Bolbopisthia lenzi, Bolbopisthia ludvigseni
 Podocopida - Bairdiidae
Krausella inaequalis, Krausella ? minuta
 Podocopida - Bairdiocyprididae
Bairdiocypris sp.
Bairdiocypris sp. Kegel 1932 ostracod