Mazon Creek Fossil Fauna
Arthropods
Higher Crustaceans - Class Malacostraca
Marine-Estuarine Shrimp and Lobsters
Marine-Estuarine Shrimp
Fossil shrimp were first reported from the Mazon Creek area around 1860, but prior to the opening of Pit 11 the diversity was remarkably small. Now, they are divided into robust non-marine and marine-estuarine groups. These fossil arthropods are preserved in full-body detail or as exoskeleton molts.
Tyrannophontes theridion
mantis shrimp
Tyrannophontes theridion, A. Jansen, Braidwood, IL
Kallidecthes richardsoni
Belotelson magister
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Lobetelson mclaughlinae
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Peachocaris strongi
Essoidia epiceron
S-shrimp
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Hesslerella shermani
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Lobsters
Mamayocaris jaskoskii
Mamayocaris jaskowskii is a moderate-sized crayfish-like animal, probably a scavenger or low-level carnivore, and is a member of the marine Essex Biota.
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Phyllocarids
Dithyrocaris sp.
Kellibrooksia macrogaster
Shrimp Molts
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Indeterminate shrimp
