Cnemidopyge fauna, Road River Fm., Llandeilo-early Caradoc (Ordovician to of Canada)

Where: Northwest Territories, Canada (64.5° N, 130.0° W: paleocoordinates 9.1° N, 56.3° W)

• coordinate based on nearby landmark

• basin-level geographic resolution

When: Road River Formation, Llandeilo to Llandeilo (461.1 - 449.5 Ma)

• "Llandeilo-early Caradoc."

Environment/lithology: marine; black, gray, calcareous shale

• "dark grey to black calcareous shales. slope BA6"

Size class: macrofossils

Primary reference: R. Ludvigsen. 1981. Trilobite biofacies of the Cambrian-Ordovician boundary interval in northern North America. Alcheringa 7(4):301-319 [M. Uhen/J. Ju]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 316: 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
 Phacopida - Calymenidae
Platycalymene sp. Shirley 1936 trilobite
 Phacopida - Encrinuridae
Cybeloides sp. Slocum 1913 trilobite
Staurocephalus sp. Barrande 1846 trilobite
 Phacopida - Cheiruridae
Kawina sp. Barton 1916 trilobite
 Corynexochida - Leiostegiidae
Agerina norrisi trilobite
 Asaphida - Remopleurididae
Robergiella cf. sagittalis Whittington 1959 trilobite
originally entered as "Robergiella cf. sagittalis"
 Asaphida - Nileidae
Peraspis sp. Whittington 1965 trilobite
originally entered as "Periaspis sp."
 Ptychopariida -
Ptychopariida indet. Swinnerton 1915 trilobite
megistaspid
 Trinucleida - Raphiophoridae
Lonchodomas sp. Angelin 1854 trilobite
Ampyx sp. Dalman 1827 trilobite
 Trinucleida - Alsataspididae
Spirantyx sp. Whittard 1961 trilobite
Artiopoda
 Agnostida - Metagnostidae
Arthrorhachis sp. Hawle and Corda 1847
originally entered as "Arthrorachis sp."
Cephalopoda
 Nautiloidea -
Nautiloidea indet. Agassiz 1847 nautiloid
orthocone cephalopod
Lingulata
 Lingulida -
? Lingulida indet. Waagen 1885
originally entered as "? Lingulida indet."
Rhynchonellata
 Orthida - Dalmanellidae
Dalmanellidae indet. Schuchert 1913
Pterobranchia
 Graptoloidea - Diplograptidae
Diplograptus sp. graptolite
Orthograptus sp. Lapworth 1873 graptolite
Hexactinellida
  -
? Hexactinellida indet. Schmidt 1870 glass sponge
sponge spicules - originally entered as "? Hexactinellida indet."