a window into the cambrian: exceptionally preserved arthropods from quebec and wisconsin collette,...
TRANSCRIPT
A WINDOW INTO THE CAMBRIAN: EXCEPTIONALLY PRESERVED ARTHROPODS
FROM QUEBEC AND WISCONSIN
COLLETTE, Joseph H., Department of Geosciences, University of Massachusetts, Amherst, MA., 01003 And
HAGADORN, James W., Department of Geology, Amherst College, Amherst, MA 01002.
Blackberry Hill Lagerstätte
Mosinee erosional outlier
A
A’
Potsdam SandstoneMelocheville, Quebec
Image © Ronald Blakely, used with permission
Ichnology
1 cm 1 cmPhyllocaridUndescribed looping trackway
* Vertical exaggeration in block diagrams
Preservational Model
Channel
8.5 cm
Overbank
Levee
Wisconsin phyllocarids
1 cm 1 cm
Aglaspinoids
1 cm
1 cm 1 cm 1 cm
Phyllocarid
Quebec Arthropods
1 cm
1 cm
Wisconsin Phyllocarid Reconstruction
Based on 45 specimens
Wisconsin ‘Phyglaspicarcinoids’
Based on 3 specimens
Quebec ‘aglaspinoid’
Based on 2 specimens
Phylogeny
Produced with PAUP 4.10bC/S Data from Rode & Lieberman (2002)
And Briggs et al. (2003)
Phylogeny
Produced with PAUP 4.10b
Acknowledgments
• GSA Graduate Student Research Grant. Geological Society of America
• Evolving Earth Student Grant. Evolving Earth Foundation.
• Gerald M. Friedman Fund. Society for Sedimentary Geology.
• Lerner-Gray Grant for Marine Research. American Museum of Natural History.
• Paleontological Society Student Research Grant. The Paleontological Society.
• Student Award In Systematic Paleontology. Paleontological Research Institute.
• Thanks also to D. E. K. Briggs and A. L. Stigall for their help with this project
Associated Fauna
1 cm 1 cm
1 cm10 cm
Scyphomedusa 3-D Scyphomedusa
Climactichnites Undescribed arthropod trackway