Where: Yukon, Canada (65.9° N, 136.2° W: paleocoordinates 31.7° N, 25.7° W)
• coordinate stated in text
• basin-level geographic resolution
When: Middle Pennsylvanian to Middle Pennsylvanian (314.6 - 298.9 Ma)
• The Permo-Pennsylvanian in the northern Yukon is ideally divided into three units called, in ascending order: Lower Limestone unit, Middle Recessive unit, and Tahkandit Formation (Nelson, 1961a, b, 1962b). It doesn't appear that the Lower Limestone unit and the Middle Recessive unit are formations or members and therefore the two units are treated as a bed/horizon.
Environment/lithology: marine; silty limestone
Size classes: macrofossils, microfossils
Collection methods: Authors counted brachiopods only, but listed other taxa present. Fossils were collected from five horizons in the Lower Limestone unit, but the horizons are not labeled in Text-Fig. 2 or listed elsewhere in the article.
Primary reference: S. J. Nelson and C. E. Johnson. 1968. Permo-Pennsylvanian brachythyrid and horridonid brachiopods from the Yukon Territory, Canada. Journal of Paleontology 42(3):715-746 [T. Olszewski/L. Fall]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 61573: authorized by Tom Olszewski, entered by Leigh Fall on 20.06.2006
Creative Commons license: CC BY (attribution)
Taxonomic list
Foraminifera | |
Ozawainella sp. Thompson 1935 | |
Strophomenata | |
"cf. Echinoconchus fasciatus" = Karavankina fasciata
"cf. Echinoconchus fasciatus" = Karavankina fasciata Kutorga 1844 Listed as Echinoconchus sp. cf. E. fasciatus
| |
Bailliena yukonensis n. gen. n. sp.
| |
Rhynchonellata | |
"Spirifer nikitini" = Purdonella nikitini
"Spirifer nikitini" = Purdonella nikitini Tschernyschew 1902 | |