Road River Formation, Northern Cordillera (Devonian of Canada)

Where: Northwest Territories, Canada (64.0° N, 133.0° W: paleocoordinates 2.6° N, 44.3° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Road River and /or Delorme Formation, Lochkovian (419.2 - 410.8 Ma)

• Listed as Upper Lochkovian. Skenidioides-Spirigerina-Vagrania community

• formation-level stratigraphic resolution

Environment/lithology: deep subtidal shelf; lithified, shelly/skeletal limestone and poorly lithified, calcareous shale

• Notes that no species is dominant; "deep water facies"
• Dark, platy to thick-bedded, fossiliferous limestones and calcareous shales

Size classes: macrofossils, mesofossils

Primary reference: A.C. Lenz. 1976. Lower Devonian brachiopod communities of the northern Canadian Cordillera. Lethaia 9:19-27 [P. Novack-Gottshall/P. Hearn]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 75581: authorized by Phil Novack-Gottshall, entered by Paul Hearn on 18.10.2007

Creative Commons license: CC BY (attribution)

Taxonomic list

• Skenidioides-Spirigerina-Vagrania community; Primarily focused on brachiopods, but notes that "gastropods are quite common throughout the sequence, while colonial corals and bivalves, though present, are relatively rare"
Ostracoda
 Myodocopida -
Franklinella sp. ostracod
"Abundant"
Strophomenata
 Productida - Chonetidae
Chonetes sp. Fischer de Waldheim 1830
"Lesser element"
 Strophomenida - Douvillinidae
 Strophomenida - Amphistrophiidae
Mesodouvillina sp. Williams 1950
"Lesser element"
Rhynchonellata
 Spiriferida - Ambocoeliidae
Metaplasia sp.
"Lesser element"
Plicoplasia sp.
"Abundant"
 Pentamerida - Parastrophinidae
"Grayina sp." = Anastrophia (Grayina)
"Grayina sp." = Anastrophia (Grayina)
"Lesser element"
 Pentamerida - Gypidulidae
Carinagypa sp. Johnson and Ludvigsen 1973
"Lesser element"
 Pentamerida - Clorindidae
Clorinda sp. Barrande 1879
"Lesser element"
 Atrypida - Karpinskiidae
"Toquimaella sp." = Mimatrypa
"Toquimaella sp." = Mimatrypa
"Abundant"
 Atrypida - Atrypinidae
Atrypina sp. Hall and Clarke 1893
"Lesser element"
Spirigerina supramarginalis Khalfin 1948
"Abundant"
 Atrypida - Punctatrypidae
Reticulatrypa sp.
"Lesser element"
 Rhynchonellida - Machaerariidae
Machaeraria sp.
"Lesser element"
 Rhynchonellida - Leiorhynchidae
"Katunia sp." = Katuniella
"Katunia sp." = Katuniella
"Lesser element"
 Rhynchonellida - Camarotoechiidae
Linguopugnoides cf. carens
"Lesser element"
 Orthida - Draboviidae
Muriferella sp.
"Abundant"
 Orthida - Dalmanellidae
 Orthida - Hesperorthidae
Dolerorthis sp. Schuchert and Cooper 1931
"Lesser element"
Bivalvia
  -
Bivalvia indet. Linnaeus 1758 clam
"Though present, are relatively rare"
Gastropoda
  -
Gastropoda indet. Cuvier 1797 snail
"Quite common"
Anthozoa
  -
Anthozoa indet. Ehrenberg 1834
"Though present, are relatively rare"