Failleana-Krausella biofacies, no formation name, Chazyan (Ordovician of Canada)

Where: Northwest Territories, Canada (62.0° N, 126.0° W: paleocoordinates 5.7° N, 59.6° W)

• coordinate based on political unit

When: Chazyan (468.1 - 460.9 Ma)

• "M. Ord., Chazyan, ~=biofacies III of Ludvigsen, 1978"

Environment/lithology: offshore shelf; carbonate

• "carbonate? outer shelf (BA5) ocean facing stable shelf"

Size class: macrofossils

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: general faunal/floral analysis

PaleoDB collection 315: authorized by Jack Sepkoski, entered by Mike Sommers on 20.11.1998

Creative Commons license: CC BY (attribution)

Taxonomic list

• "Hayes, 1980. Can. Jour. Earth Sci. 17:1377-1388. Ludvigsen, 1979. Geol Surv. Can. Bull 312. Ross, 1982. NAPC III"
Strophomenata
 Orthotetida - Triplesiidae
Onychoplecia sp. Cooper 1956
 Strophomenida - Rafinesquinidae
"Macrocoelia sp." = Colaptomena
"Macrocoelia sp." = Colaptomena Cooper 1956
Rhynchonellata
 Rhynchonellida - Trigonirhynchiidae
Rostricellula sp. Ulrich and Cooper 1942
 Orthida - Plaesiomyidae
Chaulistomella sp. Cooper 1956
 Orthida - Glyptorthidae
Glyptorthis sp. Foerste 1914
 Orthida - Plectorthidae
Mimella sp. Cooper 1930
Stenolaemata
 Cryptostomata - Rhinidictyidae
Pachydictya sp. Ulrich 1882
Stictopora sp. Hall 1847
 Cryptostomata - Arthrostylidae
Nematopora sp. Ulrich 1888
Helopora sp. Hall 1851
Ulrichostylus sp. Bassler 1952
  - Phylloporinidae
 Trepostomata -
Trepostomata indet. Ulrich 1882
 Cyclostomata -
Ostracoda
  -
  - Sigmoopsidae
 Palaeocopida - Cryptophyllidae
Cryptophyllus sp. Levinson 1951 ostracod
 Palaeocopida - Hollinidae
Eohollina sp. ostracod
 Palaeocopida - Lomatopisthiidae
 Podocopida - Steusloffinidae
Steusloffina sp. Teichert 1937 ostracod
 Podocopida - Beecherellidae
 Podocopida - Bairdiidae
Krausella sp. ostracod
 Podocopida - Bairdiocyprididae
Bairdiocypris sp. Kegel 1932 ostracod
 Leperditellocopida - Primitiidae
 Leperditellocopida - Schmidtellidae
Schmidtella sp. Ulrich 1892 ostracod
 Leperditellocopida - Aparchitidae
 Hollinocopida - Euprimitiidae
 Hollinocopida - Tetradellidae
Tetradella sp. Ulrich 1890 ostracod
 Hollinocopida - Eurychilinidae
Eurychilina sp. Ulrich 1889 ostracod
Trilobita
 Harpetida - Harpetidae
Dolichoharpes sp. Whittington 1949 trilobite
 Lichida - Lichidae
Hemiarges sp. Gürich 1901 trilobite
Amphilichas sp. Raymond 1905 trilobite
originally entered as "Amphilicas sp."
 Asaphida - Asaphidae
Nahannia sp. Chatterton and Ludvigsen 1976 trilobite
originally entered as "Nehannia sp."
Isotelus sp. Dekay 1824 trilobite
 Asaphida - Remopleurididae
Remopleurides sp. Portlock 1843 trilobite
 Corynexochida - Styginidae
Failleana sp. Chatterton and Ludvigson 1976 trilobite
 Corynexochida - Illaenidae
Bumastoides sp. Whittington 1954 trilobite
Nanillaenus sp. Jaanusson 1954 trilobite
 Proetida - Dimeropygidae
Dimeropyge sp. Opik 1937 trilobite
 Proetida - Telephinidae
"Carrickia sp." = Phorocephala
"Carrickia sp." = Phorocephala Lu 1965 trilobite
originally entered as "Carrichia sp."
 Odontopleurida - Odontopleuridae
Ceratocephala sp. Warder 1838 trilobite
Apianurus sp. Whittington 1956 trilobite
 Phacopida - Encrinuridae
Cybeloides sp. Slocum 1913 trilobite
Encrinuroides sp. Reed 1931 trilobite
originally entered as "Eocrinuroides sp."
 Phacopida - Cheiruridae
Acanthoparypha sp. Whittington and Evitt 1953 trilobite
Pandaspinapyga sp. Esker and Levin 1964 trilobite
Ceraurinella sp. Cooper 1953 trilobite
Sphaerexochus sp. Beyrich 1845 trilobite
Heliomeroides sp. Evitt 1951 trilobite
Holia sp. Bradley 1930 trilobite
 Phacopida - Pterygometopidae
Calyptaulax sp. Cooper 1930 trilobite
originally entered as "Calyptaulay sp."