Mazon Creek Fossil Fauna
Arthropods
Horseshoe Crabs
Euproops danae
The Field Museum collection
D.Dolak collection - positive and negative halves of a Euproops danae specimen showing full telson (tail).
The Chicago Academy of Sciences collection
M.Angkuw collection - Wilmington, IL
Euproops danae, A.Young collection - Wilmington, Illinois
A.Young collection - Wilmington, IL
A.Young collection - Wilmington, Illinois
R.Holm collection - Mazon River, Morris, IL.
This concretion was naturally opened by seasonal freezing and thawing, then tumbled slightly by the river current.
This concretion was naturally opened by seasonal freezing and thawing, then tumbled slightly by the river current.
Paleolimulus sp.
Paleolimulus sp., A.Young collection - Pit 11, Braidwood, Illinois, Figure 39.4 The Mazon Creek Fossil Fauna 2012
Paleolimulus sp., The Field Museum collection (T.Testa)
Paleolimulus sp., Milwaukee Public Museum collection P359244
Paleolimulus sp., MPM P25924.1 and P25924.2 (positive and negative halves).
Liomesaspis laevis
Liomesaspis laevis, M.Angkuw collection - Mazon River, Morris, Illinois