Also known as Spence Shale
Where: Utah (42.0° N, 112.0° W: paleocoordinates 5.7° S, 89.7° W)
• coordinate estimated from map
• local area-level geographic resolution
When: Glossopleura trilobite zone, Lead Bell Shale Formation, Delamaran (513.0 - 505.0 Ma)
• Listed as Lower to Middle Cambrian; Glossopleura zone
• bed-level stratigraphic resolution
Environment/lithology: platform or shelf-margin reef; poorly lithified, gray, silty shale
Size classes: macrofossils, mesofossils
Preservation: 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 77218: authorized by Phil Novack-Gottshall, entered by Paul Hearn on 02.01.2008
Creative Commons license: CC BY (attribution)
Taxonomic list
Yuknessia simplex | |
Yuknessia simplex Walcott 1919 | |
Bryopsidophyceae | |
Margaretia dorus Walcott 1931 | |
Marpolia | |
Marpolia sp. Walcott 1919 | |
Morania fragmenta | |
Morania fragmenta Walcott 1919 | |
Hexactinellida | |
Brooksella sp. Bassler 1941 glass sponge | |
Demospongiae | |
Vauxia magna Rigby 1980 demosponge
Vauxia gracilenta Walcott 1920 demosponge | |
unclassified | |
Arthropoda indet. Latreille 1829 | |
Tuzoia retifera Walcott 1912 | |
Anomalocaris nathorsti Walcott 1911 | |
Crustacea | |
Canadaspis cf. perfecta Walcott 1912 | |
Malacostraca | |
Deuteropoda | |
Branchiocaris pretiosa Resser 1929 | |
Megacheira | |
Leanchoilia hanceyi Briggs and Robison 1984 | |
Utahcaris orion | |
Utahcaris orion Conway Morris and Robison 1988 | |
Bilateria | |
Acinocricus stichus Conway-Morris and Robison 1988 | |
Selkirkia cf. columbia Conway Morris 1977 | |
Palaeoscolecida | |
"Palaeoscolex ratcliffei" = Wronascolex ratcliffei
"Palaeoscolex ratcliffei" = Wronascolex ratcliffei GarcĂa-Bellido et al. 2013 | |
Rhynchonellata | |
Wimanella sp. Walcott 1908 | |
Hyolitha | |
"Hyolithes idahoensis" = Haplophrentis carinatus Matthew 1899
Haplophrentis reesei Babcock and Robison 1988 | |
Wiwaxia corrugata Matthew 1899 | |
Tergomya | |
Ctenocystoidea | |
Ctenocystis utahensis Robison and Sprinkle 1969 | |
Eldonia ludwigi Walcott 1911 | |
Canadia | |
Canadia sp. Walcott 1911 |