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The coxal glands of geophilomorpha (chilopoda): Organs of osmoregulation
Authors:Dr. J. Rosenberg  G. Seifert
Affiliation:(1) Department of Experimental Morphology, Institute of Zoology, University of Köln, Köln, Germany;(2) Institute of General and Special Zoology, Justus Liebig University of Giessen, Lahn-Giessen, Germany;(3) Zoologisches Institut der Universität, Lehrstuhl für Experimentelle Morphologie, Weyertal 119, D-5000 Köln 41, Germany
Abstract:Summary The organs terminating at the coxal pores of the tug-legs of Geophilomorpha are not repugnatorial glands, but possess typical transport epithelia with deep apical and basal infoldings of the cell membranes, between which numerous large mitochondria are located. Many transport vesicles are found in the basal region but fewer in the apical cytoplasm. The apex is characterized by bundles of longitudinally oriented microtubules, sparse endoplasmic reticulum and free ribosomes. Single neurosecretory axons with synaptoid areas are scattered among the cells. It is suggested that the coxal organs have a diuretic function in moist habitats and an antidiuretic effect in arid environments. The ldquoswitch-overrdquo is evidently controlled by a neuroendocrine mechanism.
Keywords:Coxal organs  Water transport  Geophilomorpha  Ultrastructure
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