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Monographie De La Glande Androgène Des Crustacés Supérieurs

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The androgenic gland discovered in 1954 in the amphipod Orchestia gammarellus has been described in all the superorders of the higher Crustacea, except the Syncarida which have not yet been investigated. The androgenic gland is localized in the last thoracic segment, against the subterminal, ejaculatory part of the vas deferens. In the Isopoda and the Tanaidacea the gland may occur, according to the species, in front of or along the testicular utricles, against the seminal vesicle or against the vas deferens. In addition, it is often closely joined with the genital apparatus. The androgenic gland seems of genital origin. It acquires progressively in the course of the first intermolts (after the acquisition of the specific form) the morphological, cytological and cytochemical characters of the adult gland. The histological structure of the androgenic gland is relatively varied: types in simple strands, compound strands, spherules or lobules. The cytological aspect assumes, by contrast, a great uniformity. The size of the nuclei may vary between 3 and 10 μ, but the cytoplasm is always strongly pyroninophilous in summer. Holocrine secretion seems to be the general mode of functioning of the androgenic gland. Although interesting results have been recorded, many particulars remain still to be supplied on the histogenesis, histochemistry, the embryonic and postembryonic development of the androgenic gland


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Affiliations: 1: Laboratoire de Génétique Evolutive et de Biométrie, CNRS, Gif-sur-Yvette, S. & O., et Laboratoire de Microscopie électronique appliquée à la Biologie, CNRS, Paris, France


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