MacKenzie Mtns., "Hesperonomia fauna," Zone J, Broken Skull Fm. (Ordovician of Canada)

Where: Northwest Territories, Canada (64.7° N, 132.0° W: paleocoordinates 6.7° N, 59.2° W)

• coordinate based on political unit

• basin-level geographic resolution

When: Pseudocybele nasuta trilobite zone, Broken Skull Formation, Canadian (485.4 - 457.3 Ma)

• "Canadian [age]? zone j." (PJW: Pseudocybele nasuta)

Environment/lithology: shallow subtidal; lithology not reported

• "sandy ls and dolo. shallow water. BA3. open facing shelf (narrow shelf)"

Size class: macrofossils

Primary reference: R. Ludvigsen. 1975. Ordovician formations and faunas, southern Mackenzie Mountains. Canadian Journal of Earth Sciences 12:663-697 [S. Holland/T. Hanson/J. Ju]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 294: authorized by Jack Sepkoski, entered by Mike Sommers on 21.03.1999

Creative Commons license: CC BY (attribution)

Taxonomic list

• "R.Ludvigsen, 1975. Ord. formations and faunas, southern MacKenzie Mtns. Can.J.Earth.Sci. 12:663-697" [trilobites and brachs only]
Show authors, comments, and common names
Rhynchonellata
 Orthida - Hesperonomiidae
? Hesperonomiella sp., Hesperonomia sp.
? Hesperonomiella sp.
originally entered as "? Hesperonomiella sp."
Hesperonomia sp. Ulrich and Cooper 1936
 Orthida - Finkelnburgiidae
Diparelasma sp.
Diparelasma sp. Ulrich and Cooper 1936
 Pentamerida - Tetralobulidae
Syntrophopsis sp.
Strophomenata
 Billingsellida - Polytoechiidae
Tritoechia sp.
Tritoechia sp. Ulrich and Cooper 1936
Trilobita
 Proetida - Telephinidae
? Carolinites sp.
? Carolinites sp. Kobayashi 1940 trilobite
originally entered as "? Carolinites sp."
 Proetida - Bathyuridae
"Goniotelina sp." = Acidiphorus
"Goniotelina sp." = Acidiphorus Raymond 1925 trilobite
 Phacopida - Pliomeridae
Pseudocybele sp.
Pseudocybele sp. Ross 1951 trilobite