Where: Utah (39.0° N, 113.0° W: paleocoordinates 4.5° S, 91.9° W)
• coordinate estimated from map
• small collection-level geographic resolution
When: Bolaspidella trilobite zone, Marjum Formation, Marjumian (504.5 - 497.0 Ma)
• Listed as Upper to Middle Cambrian; Bolaspidella biozone (Marjumian; PJW)
• bed-level stratigraphic resolution
Environment/lithology: slope; poorly lithified, lenticular, silty, calcareous shale
Size classes: macrofossils, mesofossils
Preservation: trace, soft parts
Primary reference: D. E. G. Briggs and R. A. Robison. 1984. Exceptionally preserved nontrilobite arthropods and Anomalocaris from the Middle Cambrian of Utah. University of Kansas Paleontological Contributions 111:1-23 [P. Novack-Gottshall/P. Hearn/J. Alroy]more details
Purpose of describing collection: biostratigraphic analysis
PaleoDB collection 77206: authorized by Phil Novack-Gottshall, entered by Paul Hearn on 31.12.2007
Creative Commons license: CC BY (attribution)
Taxonomic list
Lingulata | |
Lingulata indet. Gorjansky and Popov 1985 | |
unclassified | |
Arthropoda indet. Latreille 1829 | |
Deuteropoda | |
Branchiocaris pretiosa Resser 1929 | |
Anomalocaris nathorsti Walcott 1911 | |
Artiopoda | |
"Ptychagnostus occultatus" = Acidusus occultatus, Ptychagnostus punctuosus
"Ptychagnostus occultatus" = Acidusus occultatus Öpik 1979
Ptychagnostus punctuosus Angelin 1851 | |
Pseudoperonopsis sp. Harrington 1938
Hypagnostus parvifrons Linnarsson 1869 | |
Naraoia compacta Walcott 1912 | |
Trilobita | |
Modocia typicalis trilobite
Modocia sp. Walcott 1924 trilobite | |
Bolaspidella sp. Resser 1937 trilobite | |
Tuzoia guntheri Robison and Richards 1981 | |
Ottoia prolifica Walcott 1911 | |
Hexactinellida | |
Protospongia elongata glass sponge | |
Valospongia gigantis glass sponge | |
"Testispongia venula" = Testiispongia
"Testispongia venula" = Testiispongia glass sponge Originally "Testiispongia venula" Assumed spelling error.
| |
Demospongiae | |
Hamptonia bowerbanki Walcott 1920 demosponge | |
"Leptomitus metta" = Leptomitella metta
"Leptomitus metta" = Leptomitella metta Rigby 1983 demosponge | |
Choia utahensis Walcott 1920 demosponge
Choia carteri Walcott 1920 demosponge | |
Morania fragmenta | |
Morania fragmenta Walcott 1919 |