PBDB Collection

District of Mackenzie Ceraurinella nahanniensis zone (Ordovician of Canada)

Where: Northwest Territories, Canada (62.0° N, 127.0° W: paleocoordinates 6.3° N, 59.7° W)

• coordinate estimated from map

• basin-level geographic resolution

When: Ceraurinella nahanniensis trilobite zone, Esbataottine Formation, Chazyan (470.0 - 457.3 Ma)

• formation-level stratigraphic resolution

Environment/lithology: gray, argillaceous, silty limestone

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

• ...medium to dark grey, microcrystalline to finely crystalline, thin- to medium-bedded, commonly argillaceous and silty limestones that weather banded grey and buff.

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 24621: 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
-	Onychoplesia sp., Tetradellina sp. n. sp., Wincellatia sp. n. sp., Phylloporinida indet. Onychoplesia sp. Tetradellina sp. n. sp. Wincellatia sp. n. sp. Phylloporinida indet.
Rhynchonellata
Rhynchonellida - Trigonirhynchiidae	Rostricellula sp. Rostricellula sp. Ulrich and Cooper 1942
Orthida - Plectorthidae	Mimella aff. globosa Mimella aff. globosa Willard 1928
Orthida - Plaesiomyidae	Chaulistomella cf. nitens Chaulistomella cf. nitens
Orthida - Glyptorthidae	Glyptorthis cf. costellata Glyptorthis cf. costellata Cooper 1956
Strophomenata
Strophomenida - Rafinesquinidae	"? Macrocoelia sp." = Colaptomena "? Macrocoelia sp." = Colaptomena Cooper 1956
Stenolaemata
Cryptostomata - Rhinidictyidae	Pachydictya sp., Stictopora sp. Pachydictya sp. Ulrich 1882 Stictopora sp. Hall 1847
Cryptostomata - Arthrostylidae	Helopora spp. Helopora spp. Hall 1851
Trepostomata -	Trepostomata indet. Trepostomata indet. Ulrich 1882
Ostracoda
- Sigmoopsidae	Oecematobolbina varicata Oecematobolbina varicata ostracod
Leperditicopida - Leperditiidae	Eoleperditia sp. Eoleperditia sp. Swartz 1949 ostracod
Leperditellocopida - Primitiidae	? Ectoprimitia pustulosa ? Ectoprimitia pustulosa ostracod
Leperditellocopida - Aparchitidae	Aparchites sp., Aparchites fimbriatus Aparchites sp. ostracod "Aparchites" Aparchites fimbriatus ostracod "Aparchites"
Leperditellocopida - Schmidtellidae	Schmidtella affinis Schmidtella affinis ostracod
Hollinocopida - Eurychilinidae	Eurychilina sunbloodensis Eurychilina sunbloodensis ostracod
Hollinocopida - Tetradellidae	Tetradella perplexa, Piretia sp. n. sp. Tetradella perplexa ostracod Piretia sp. n. sp. Jaanusson 1957 ostracod
Hollinocopida - Euprimitiidae	? Euprimitia krafti, ? Echinoprimitia sp. n. sp. ? Euprimitia krafti ostracod ? Echinoprimitia sp. n. sp. ostracod
Podocopida - Bairdiocyprididae	Bairdiocypris cf. granti Bairdiocypris cf. granti ostracod
Podocopida - Bairdiidae	Krausella ? minuta Krausella ? minuta ostracod
Podocopida - Beecherellidae	Platyrhomboides quadratus Platyrhomboides quadratus ostracod
Podocopida - Steusloffinidae	Steusloffina borealis Steusloffina borealis ostracod
Palaeocopida - Leperditellidae	Leperditella sp., Leperditella mundula Leperditella sp. ostracod Leperditella mundula ostracod
Palaeocopida - Lomatopisthiidae	Bolbopisthia ludvigseni Bolbopisthia ludvigseni ostracod
Palaeocopida - Cryptophyllidae	Cryptophyllus oboloides Cryptophyllus oboloides ostracod
Palaeocopida - Hollinidae	Eohollina depressa Eohollina depressa ostracod
-	Ludvigsenites mackenziensis Ludvigsenites mackenziensis ostracod
Trilobita
Harpetida - Harpetidae	Dolichoharpes aff. reticulata Dolichoharpes aff. reticulata Whittington 1949 trilobite
Lichida - Lichidae	Amphilichas aff. aspratilis, Amphilichas conradi, Hemiarges turneri Amphilichas aff. aspratilis Bradley 1930 trilobite Amphilichas conradi Chatterton and Ludvigsen 1976 trilobite Hemiarges turneri Chatterton and Ludvigsen 1976 trilobite
Phacopida - Pterygometopidae	Calyptaulax callirachis Calyptaulax callirachis Cooper 1953 trilobite
Phacopida - Cheiruridae	Heliomeroides teres, Holia glabra¹, Pandaspinapyga dactyla, Acanthoparypha evitti, Acanthoparypha echinoderma, Sphaerocoryphe cf. pemphis, Ceraurinella nahanniensis, Ceraurinella kingstoni, Sphaerexochus arenosus Heliomeroides teres Evitt 1951 trilobite Holia glabra¹ Adrain 1998 trilobite Pandaspinapyga dactyla Chatterton and Ludvigsen 1976 trilobite Acanthoparypha evitti Chatterton and Ludvigsen 1976 trilobite Acanthoparypha echinoderma Chatterton and Ludvigsen 1976 trilobite Sphaerocoryphe cf. pemphis trilobite Ceraurinella nahanniensis Chatterton and Ludvigsen 1976 trilobite Ceraurinella kingstoni Chatterton and Ludvigsen 1976 trilobite Sphaerexochus arenosus Chatterton and Ludvigsen 1976 trilobite
Phacopida - Encrinuridae	Walencrinuroides rolfi³, Cybeloides cimelia Walencrinuroides rolfi³ Moss and Westrop 2014 trilobite Cybeloides cimelia Chatterton and Ludvigsen 1976 trilobite
Proetida - Telephinidae	"Carrickia pinguimitra" = Phorocephala pinguimitra "Carrickia pinguimitra" = Phorocephala pinguimitra Chatterton and Ludvigsen 1976 trilobite
Proetida - Dimeropygidae	Dimeropyge speyeri² Dimeropyge speyeri² Chatterton 1994 trilobite
Corynexochida - Styginidae	Failleana calva Failleana calva Chatterton and Ludvigsen 1976 trilobite
Corynexochida - Illaenidae	Nanillaenus mackenziensis, Bumastoides lenzi Nanillaenus mackenziensis Chatterton and Ludvigsen 1976 trilobite Bumastoides lenzi Chatterton and Ludvigsen 1976 trilobite
Odontopleurida - Odontopleuridae	Apianurus parabarbatus, Ceratocephala triacantheis Apianurus parabarbatus Chatterton and Ludvigsen 1976 trilobite Ceratocephala triacantheis Whittington and Evitt 1953 trilobite
Asaphida - Remopleurididae	Remopleurides pattersoni Remopleurides pattersoni Chatterton and Ludvigsen 1976 trilobite
Asaphida - Asaphidae	Isotelus parvirugosus, Nahannia humilisulcata Isotelus parvirugosus Chatterton and Ludvigsen 1976 trilobite Nahannia humilisulcata Chatterton and Ludvigsen 1976 trilobite

¹Adrain 1998; ²Chatterton 1994; ³Moss and Westrop 2014