First Middle–Late Jurassic gladius vestiges provide new evidence on the detailed origin of incirrate and cirrate octopuses (Coleoidea)

@article{Fuchs2018FirstMJ,
  title={First Middle–Late Jurassic gladius vestiges provide new evidence on the detailed origin of incirrate and cirrate octopuses (Coleoidea)},
  author={Dirk Fuchs and G{\"u}nter Schweigert},
  journal={PalZ},
  year={2018},
  volume={92},
  pages={203-217}
}
Limpet-like and non-mineralized fossils from the upper Kimmeridgian Nusplingen Plattenkalk are identified as internal shells of coleoid cephalopods, more specifically as octobrachian gladii. The significantly reduced median field provokes us to consider this new gladius type to be shorter than the mantle length. It is consequently seen as a vestigial gladius. The first recognition of an unpaired gladius vestige in the fossil record sheds new light on the evolutionary history of the gladius… Expand
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A new peculiar muensterellid coleoid (Cephalopoda) from the Kimmeridge Clay Formation of Dorset (England)
  • D. Fuchs
  • Geology
  • Proceedings of the Geologists' Association
  • 2019
Abstract A concretion from the lower Tithonian Kimmeridge Clay Formation ( Pectinatus Zone) found by Steve Etches yielded a gladius of a coleoid cephalopod. It is peculiar in shape and has an unusual… Expand
Anatomy and evolution of the first Coleoidea in the Carboniferous
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It is suggested that conch internalization happened rather suddenly including early growth stages while the ink sac evolved slightly later, as well as the timing of other important steps in early coleoid evolutionary. Expand
The Muensterelloidea: phylogeny and character evolution of Mesozoic stem octopods

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