English: The Middle Devonian terrestrial fungus Prototaxites milwaukeensis (Penhallow, 1908); Milwaukee Formation; Berthelet Member; Milwaukee County, Wisconsin; collected by Charles E. Monroe; MPM 402; holotype; photograph originally published in K.C. Gass, J. Kluessendorf, D.G. Mikulic, and C.E. Brett, 2019. Fossils of the Milwaukee Formation: A Diverse Middle Devonian Biota from Wisconsin, USA. Siri Scientific Press, Manchester, UK.
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