Where: Utah (39.2° N, 113.5° W: paleocoordinates 4.2° S, 91.9° W)
• coordinate based on nearby landmark
• local area-level geographic resolution
When: Lejopyge calva zone, Marjum and Weeks Formation, Menevian (504.5 - 499.5 Ma)
• The Lejopyge calva ""Zone"" described in this article is actually considered to be a subzone of the upper Bolaspidella Zone or comperable to the Lejopyge laevigata Zone.
• group of beds-level stratigraphic resolution
Environment/lithology: deep subtidal ramp; lithified lime mudstone and lithified packstone
•lowermost Weeks - similar to upper Marjuman.
Collection methods: chemical,
• Only trilobites listed in depth.
Primary reference: R. A. Robison. 1999. Lithology and faunas of the Lejopyge calva Zone. Laurentia 99: V fields conference of the Cambrian Stage Subdivision Working Group, International Subcomission on Cambrian Stratigraphy 21-21 [M. Patzkowsky/P. Borkow/Z. Krug]more details
Purpose of describing collection: biostratigraphic analysis
PaleoDB collection 10572: authorized by Mark Patzkowsky, entered by Phil Borkow on 24.05.2001
Creative Commons license: CC BY (attribution)
Taxonomic list
unclassified | |
| |
Hyolithellus sp. Billings 1872 | |
Inarticulata | |
Trilobita | |
Bolaspidella sp. Resser 1937 trilobite | |
Hardyoides sp. Kobayashi 1938 trilobite | |
Modocia sp. Walcott 1924 trilobite | |
Genevievella sp. Lochmann 1936 trilobite | |
Bonneterrina sp. Lochmann 1936 trilobite
? Cedarina sp. Lochman 1940 trilobite | |
Artiopoda | |
Diplagnostus planicauda Angelin 1851 | |
"Ptychagnostus cassis" = Acidusus cassis, "Ptychagnostus aculeatus" = Acidusus aculeatus, "Lejopyge calva" = Lejopyge laevigatus
"Ptychagnostus cassis" = Acidusus cassis Öpik 1961
"Ptychagnostus aculeatus" = Acidusus aculeatus Angelin 1851
"Lejopyge calva" = Lejopyge laevigatus Dalman 1828 | |
Clavagnostus repandus Westergard 1930
Utagnostus trispinulus Robison 1964 | |
Tomagnostella exsculpta Angelin 1851 | |
Agnostus neglectus Westergard 1946 | |
unclassified | |
Porifera indet. Grant 1836 |