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Pohlsepia mazonensis holotype

Original caption: A, Pohlsepia mazonensis, gen. et sp. nov., holotype, in siderite concretion, Upper Carboniferous (Westphalian D), Francis Creek Shale Member, Carbondale Formation, near Braidwood, Will County, Illinois; ×1.9. B, drawing of Pohlsepia mazonensis gen. et sp. nov.; ×1.9. Abbreviations: e, eye; ef, expressed fluid; f, fin; fu, funnel; is?, ink sac (or gut trace); m, mandibles; ma, modified arm (tentacle); r, radula.

Source: Kluessendorf, J. & P. Doyle 2000. Pohlsepia mazonensis, an early 'octopus' from the Carboniferous of Illinois, USA.PDF Palaeontology 43(5): 919-926.

Copyright: © Joanne Kluessendorf and Peter Doyle/Palaeontology

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