Abstract
THE Myxinoids are possibly the most primitive living vertebrates, and the pituitary of Myxine glutinosa has hitherto1–3 been described as having a separate infundibulum and adenohypophysis, a condition which has been regarded as primitive or degenerate. Furthermore, the adenohypophysis which lies embedded as groups of cells in connective tissue, has been described as being composed solely of chromophobes, and having no cytological or histological differentiation. Recent observations, however, have shown that the connective tissue septum does not separate completely the two parts of the pituitary but that the posterior end of the infundibulum comes into intimate contact with the adenohypophysis (Fig. 1). Also, the adenohypophysis is cytologically differentiated.
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References
De Beer, G. R., “The Comparative Anatomy, Histology and Development of the Pituitary Body” (Oliver and Boyd, London, 1926).
Grasse, P. P., “Traité de Zoologie”, 13 (Masson, Paris, 1958).
Stendall, W., Arch, mikrosk. Anat., 82, 289 (1913).
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MATTY, A. The Pituitary of Myxine glutinosa . Nature 185, 180–181 (1960). https://doi.org/10.1038/185180b0
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DOI: https://doi.org/10.1038/185180b0
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