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…
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A new peculiar muensterellid coleoid (Cephalopoda) from the Kimmeridge Clay Formation of Dorset (England)
- BiologyProceedings of the Geologists' Association
- 2019
The Muensterelloidea: phylogeny and character evolution of Mesozoic stem octopods
- BiologyPapers in Palaeontology
- 2019
It is confirmed that the Muensterelloidea possess the smallest median field sizes of all Mesozoic gladii, a milestone in the evolution of the octopod gladius vestige occurred between the Early and Middle Jurassic.
Anatomy and evolution of the first Coleoidea in the Carboniferous
- BiologyCommunications Biology
- 2019
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.
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