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