Mount Arete (Devonian of Canada)

Also known as Exshaw Formation at Mount Arete

Where: Alberta, Canada (52.4° N, 116.9° W: paleocoordinates 6.1° S, 43.6° W)

• coordinate stated in text

• small collection-level geographic resolution

When: Palmatolepis expansa conodont zone, Lower Black Shale Member (Exshaw Formation), Late/Upper Famennian (364.7 - 360.7 Ma)

• Collection is a small lens.Undoubtedly Famennian brachiopods are said to co-occur with Mississippian-aspect conodonts. Raasch suggests that the Devonian fossils are part of a lag deposit.

• bed-level stratigraphic resolution

Environment/lithology: marine; black shale and pyritic siltstone

• Ref. 9601: "pyritic siltstone lens" in "black shale"

Size classes: macrofossils, mesofossils

Primary reference: G. O. Raasch. 1988. Famennian faunal zones in western Canada. In N. J. McMillan, A. F. Embry, and D. J. Glass (eds.), Devonian of the World, Volume III. Canadian Society of Petroleum Geologists. Calgary, Alberta, Canada 619-631 [M. Foote/M. Foote/M. Foote]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 35545: authorized by Michael Foote, entered by Michael Foote on 19.12.2003

Creative Commons license: CC BY (attribution)

Taxonomic list

• Schindewolf (1959) describes the cephalopods Imitoceras sp., Protocanites sp., and a form related to Prodromites, and Bacrites sp. sensu lato from what is definitely the same locality, but only Imitoceras is listed by Raasch
unclassified
  -
Tracheophyta indet.
"pyritized wood"
Scyphozoa
 Conulariida - Conulariidae
Deuteropoda
  -
Ostracoda indet. Latreille 1802 ostracod
Lingulata
 Lingulida - Lingulidae
Strophomenata
 Strophomenida - Chonetidae
 Productida - Productellidae
 Orthotetida - Schuchertellidae
Schuchertella lens White 1862
Rhynchonellata
 Spiriferida - Spiriferidae
 Spiriferida - Ambocoeliidae
 Spiriferida - Mucrospiriferidae
 Spiriferinida - Syringothyrididae
 Athyridida - Nucleospiridae
 Rhynchonellida -
"? Allorhynchus louisianensis" = Dorsisinus louisianensis
"? Allorhynchus louisianensis" = Dorsisinus louisianensis Weller 1914
 Rhynchonellida - Stenoscismatidae
"Camerophoria cf. hamburgensis" = Stenoscisma
"Camerophoria cf. hamburgensis" = Stenoscisma
 Rhynchonellida - Rhynchoporidae
 Terebratulida -
 Terebratulida - Cryptonellidae
 Orthida - Rhipidomellidae
Stenolaemata
 Rhabdomesida - Rhomboporidae
Rhombopora sp. Meek 1872
 Cryptostomata - Fenestellidae
Fenestrellina sp. d'Orbigny 1849
 Cystoporata - Ceramoporidae
Ceramopora sp. Hall 1851
Tentaculita
 Cornulitida - Cornulitidae
Bivalvia
 Cardiidia - Grammysiidae
"Grammysia cf. hannibalensis" = Ectogrammysia hannibalensis
"Grammysia cf. hannibalensis" = Ectogrammysia hannibalensis Shumard and Swallow 1858 clam
Gastropoda
 Neritoidea - Naticopsidae
Naticopsis sp. M'Coy 1844 snail
Cephalopoda
 Goniatitida - Prionoceratidae
unclassified
  -
Chordata indet. Haeckel 1874
"fish remains"
Crinoidea
  -
Crinoidea indet. Miller 1821 Sea lily