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The Brain and Sense Organs of the Earliest Vertebrates: Reconstruction of a Morphotype

  • Chapter
Evolutionary Biology of Primitive Fishes

Part of the book series: NATO ASI Series ((NSSA,volume 103))

Abstract

Speculations on the nature of the brain and sense organs in the earliest vertebrates have traditionally been based on two different strategies. One approach has been to examine the brain and sense organs in living hagfishes and lampreys, with the assumption that these taxa are primitive and thus represent the starting point of vertebrate phylogeny (Worthington, 1906; Ariens Kappers, 1929; Heier, 1948; Stahl, 1977). This approach is confounded by considerable differences in the organization of the brain and sense organs in hagfishes and lampreys themselves, so that a single pattern of organization can not be recognized, and it also ignores the fact that these living taxa have a long evolutionary history during which many changes have obviously occurred.

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  1. Division of Biological Sciences, University of Michigan, Ann Arbor, Michigan, USA

    R. Glenn Northcutt

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Editors and Affiliations

  1. Bamfield Marine Station, Bamfield, British Columbia, Canada

    R. E. Foreman

  2. University of Washington, Seattle, Washington, USA

    A. Gorbman

  3. University College of North Wales, Bangor, UK

    J. M. Dodd

  4. University of Stockholm, Stockholm, Sweden

    R. Olsson

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Northcutt, R.G. (1985). The Brain and Sense Organs of the Earliest Vertebrates: Reconstruction of a Morphotype. In: Foreman, R.E., Gorbman, A., Dodd, J.M., Olsson, R. (eds) Evolutionary Biology of Primitive Fishes. NATO ASI Series, vol 103. Springer, Boston, MA. https://doi.org/10.1007/978-1-4615-9453-6_6

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