Keywords: Acantherpestes major fossil.jpg en Acantherpestes major Meek Worthen from Mazon Crek formation Illinois Detail at upper left spiracles Detail at upper right two spiracles enlarged 1889 J P Lesley A dictionary of the fossils of Pennsylvania and neighboring states named in the reports and catalogues of the survey Geological Survey of Pennsylvania Report P4 1889 https //archive org/details/CUbiodiversity600397-8739 Full Text J P Lesley other versions PD-old-70-1923 Uploaded with UploadWizard Myriapoda fossils |