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Morphometric classification of neurosecretory granules in the neurohypophysis of the hagfish, Eptatretus burgeri

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Summary

Neurosecretory axons in the neurohypophysis of the hagfish, Eptatretus burgeri, were statistically classified into six types according to the size of secretory granules. These types are comparable with those in higher vertebrates. The concentration of each axon type is different in three regions: anterior dorsal wall, posterior dorsal wall, and ventral wall. The regional differences of the hagfish neurohypophysis are discussed in relation to the regional differentiation of the tetrapod neurohypophysis into the median eminence and the pars nervosa.

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Authors and Affiliations

  1. Misaki Marine Biological Station, University of Tokyo, Miura, Kanagawa, Japan

    Kazuhiko Tsuneki

  2. Department of Biology, School of Education, Waseda University, Nishiwaseda, Shinjuku, Tokyo, Japan

    Tohru Adachi & Susumu Ishii

  3. Department of Biology, Faculty of Science, Shizuoka University, Ooya, Shizuoka-shi, Japan

    Yoshihiko Oota

Authors
  1. Kazuhiko Tsuneki
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  2. Tohru Adachi
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  3. Susumu Ishii
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  4. Yoshihiko Oota
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Additional information

We wish to express our appreciation to Professor Hideshi Kobayashi for the guidance of this study. It was aided by grants from the Ford Foundation and the Ministry of Education to Professor H. Kobayashi, and also by grants from the Population Council, New York and the Ministry of Education to Professor S. Ishii.

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Tsuneki, K., Adachi, T., Ishii, S. et al. Morphometric classification of neurosecretory granules in the neurohypophysis of the hagfish, Eptatretus burgeri . Cell Tissue Res. 166, 145–157 (1976). https://doi.org/10.1007/BF00227036

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  • DOI: https://doi.org/10.1007/BF00227036

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