Where: Northwest Territories, Canada (62.4° N, 127.0° W: paleocoordinates 6.2° N, 50.8° W)
• coordinate based on nearby landmark
• outcrop-level geographic resolution
When: Delorme Formation, Wenlock (433.4 - 427.4 Ma)
• Zonation based on conodonts present in AV sections 1, 2, and 4. (AV 3 and DR sections correlated with these on basis of trilobite faunal assemblages. I'm assuming AV5 can be correlated as well.) See PBDB ref. 7215. This fauna is between j (early Wenlock) and k (upper Wenlock/lower Ludlow).
• group of beds-level stratigraphic resolution
Environment/lithology: slope; argillaceous limestone and shale
•SEP environmental call based primarily on PBDB ref. 7215.
Preservation: replaced with silica
Primary reference: D. J. Siveter and B. D. E. Chatterton. 1996. Silicified calymenid trilobites from the Mackenzie Mountains, northwest Canada. Palaeontographica Abteilung A 239(1-3):43-60 [M. Foote/M. Foote/M. Foote]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 26059: authorized by Michael Foote, entered by Michael Foote on 01.10.2002, edited by Melanie Hopkins
Creative Commons license: CC BY (attribution)
Taxonomic list
Trilobita | |
Cyphaspis lowei n. sp.1
| |
Diacalymene gabrielsi Siveter and Chatterton 1996 trilobite | |
Encrinurus "sp. A"6, sensu lato Struszia mccartneyi6, Struszia (Avalanchurus) lennoni n. sp.6, Mackenziurus reimeri n. gen. n. sp.5
| |
Borealarges sp.4, Borealarges renodis4, Borealarges tuckerae4, Richterarges facetus n. sp.4, Dicranogmus lepidus3
| |
Rostroconchia | |
Mulceodens johnstoni n. sp.2
Mulceodens johnstoni n. sp.2 Caldwell and Chatterton 1995 | |
Cassowarioides anisomorpha n. sp.2, Cassowarioides polgari n. sp.2, Nehedia tricarina n. sp.2, Nehedia bergeraci n. sp.2
Cassowarioides anisomorpha n. sp.2 Caldwell and Chatterton 1995
Cassowarioides polgari n. sp.2 Caldwell and Chatterton 1995
Nehedia tricarina n. sp.2 Caldwell and Chatterton 1995
Nehedia bergeraci n. sp.2 Caldwell and Chatterton 1995 | |
Strophomenata | |
"Brachyprion (Protomegastrophia) sp." = Megastrophia (Protomegastrophia)7, Pholidostrophia (Mesopholidostrophia) lamellosa7
"Brachyprion (Protomegastrophia) sp." = Megastrophia (Protomegastrophia)7 Caster 1939
Pholidostrophia (Mesopholidostrophia) lamellosa7 Zhang 1989 | |
Pentlandina harperi7 Zhang 1989
Pentlandina lamelliformis7 Jin and Chatterton 1997 | |
Morinorhynchus crispus7 Lindström 1861 | |
Rhynchonellata | |
Hercotrema pentaforma7 Lenz 1977 | |
Merista cuneatina7 Jin and Chatterton 1997 | |
Nucleospira lentilca7 Havlicek 1990 | |
Didymothyris sp.7 Rubel and Modzalevskaya 1967 | |
Atrypoidea linguata7 von Buch 1834
Septatrypa zelia7 Barrande 1879 | |
Atrypa (Gotatrpa) variabilis7 Johnson et al. 1976
Plectatrypa unicosta7 Zhang 1989 | |
Gracianella rudicristata7 Jin and Chatterton 1997 | |
Microbilobata avalanchensis7 Jin and Chatterton 1996 | |
Spirinella tureki7 Havlicek 1990 | |
Hedeina sp.7 Boucot 1957 | |
Conchidium microlocularis7 Johnson et al. 1976 |