Cryptolithoides fauna, Road River Fm., Dist. of MacKenzie (Ordovician of Canada)

Where: Northwest Territories , Canada (65.0° N, 111.5° W: paleocoordinates 2.2° N, 52.5° W)

• coordinate based on political unit

• basin-level geographic resolution

When: Road River Formation, Caradoc (460.9 - 449.5 Ma)

• "late Caradoc (Edenian?)"

Environment/lithology: slope; black, argillaceous lime mudstone

• "black argillaceous lime mudstones. slope. BA6."

Size class: macrofossils

Primary reference: R. Ludvigsen. 1981. Biostratigraphy significance of Middle Ordovician trilobites from the Road River Formation, northern Cordillera. Geological Association of Canada Abstracts 6:A-36 [M. Uhen/J. Ju/J. Ju]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 341: authorized by Jack Sepkoski, entered by Mike Sommers on 20.11.1998

Creative Commons license: CC BY (attribution)

Taxonomic list

• "R.Ludvigsen 1981 and pers. comm."
Trilobita
 Olenida - Olenidae
Porterfieldia sp. Cooper 1953 trilobite
 Asaphida - Asaphidae
Anataphrus cf. martinensis Ross and Shaw 1972 trilobite
originally entered as "Anataphrus cf. martinensis"
 Asaphida - Remopleurididae
Robergiella sp. Whittington 1959 trilobite
 Asaphida - Raphiophoridae
Ampyxina sp. Ullrich 1922 trilobite
 Asaphida - Trinucleidae
Cryptolithoides sp. Whittington 1941 trilobite
Cryptolithus sp. Green 1832 trilobite
Rhynchonellata
 Orthida -
Orthida indet. Schuchert and Cooper 1932
orthid
Bivalvia
  -
Bivalvia indet. Linnaeus 1758 clam
bivalve
Gastropoda
 Bellerophontida - Bellerophontidae
Bellerophontidae indet. M'Coy 1851 snail
bellerophontids
Cephalopoda
 Nautiloidea -
Nautiloidea indet. Agassiz 1847 nautiloid
orthocone cephalopods
Scyphozoa
 Conulariida - Conulariidae
Conulariidae indet. Walcott 1886 jellyfish
conulariid