A Microanatomical and Histological Study of the Postcranial Dermal Skeleton of the Devonian actinopterygian Cheirolepis canadensis

  title={A Microanatomical and Histological Study of the Postcranial Dermal Skeleton of the Devonian actinopterygian Cheirolepis canadensis},
  author={Louise Zylberberg and François Jean Meunier and Michel Laurin},
  journal={Acta Palaeontologica Polonica},
  pages={363 - 376}
The Devonian stem-actinoterygian Cheirolepis canadensis is potentially important to understand the evolution of the dermal skeleton of osteichthyans, but the last detailed histological study on this taxon was published more than forty years ago. Here, we present new data about the morphology and the histological structure of scales, fulcra, and fin-rays in the Devonian actinopterygian Cheirolepis canadensis through SEM and photomicroscopy. The scales have a typical palaeoniscoid organisation… 

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The Devonian actinopterygian Cheirolepis Agassiz

  • D. M. PearsonT. S. Westoll
  • Environmental Science
    Earth and Environmental Science Transactions of the Royal Society of Edinburgh
  • 1979
Synopsis The structure of the fishes constituting the Devonian genus Cheirolepis is investigated. Articulated remains from the Scottish Old Red Sandstone and the Canadian Upper Devonian were studied

Vertebral column and associated elements in dipnoans and comparison with other fishes: Development and homology

The formation of centra, which is not homologous among vertebrate groups, is acquired independently in some lineages of placoderms, most advanced actinopterygians, and some dipnoans and rhipidistians.

Homology of fin lepidotrichia in osteichthyan fishes.

This interpretation might indicate that the fin-fold has been lost in early digited stem-tetrapods such as Acanthostega and Ichthyostegaand elongate basal elements, but not true lepidotrichia, occur in the caudal fins of these taxa.


Systematic treatment of the ultrasculpture on the exoskeleton of Palaeozoic Agnatha is given, supplemented with a discussion of the main published sources on Gnathostomata, to show relationships between thelodonts and chondrichthyans based on ultrasculPTure characteristics are much more complicated than previously discussed.

Microstructure and Growth of the Dermal Skeleton in Fossil Actinopterygian Fishes: Birgeria and Scanilepis

The histology of the dermal skeleton in Scanilepis does not support the assumption that this form is more closely related to Polypterus than other palaeonisciforms, and remarks are given on the structure of acrodin and ganoin as revealed by SEM study.