ISSN:
1432-234X
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Summary The coxal organs of different Geophilomorpha were studied by scanning and by transmission electron microscopy. 1) The coxae of the last trunk-segment contain pores in different arrangements and numbers. They are the openings of the coxal organs. 2) The coxal organs are formed by four different cell types: the main epithelium consists of radially arranged transporting cells, surrounded by junctional cells, gland cells, and the cells of the pore channel. 3) The cells of the transporting epithelium show an enlargement of the apical and basal surface. Deep and narrow extracellular channels of the apical infoldings are closely associated by mitochondria (plasmalemma-mitochondrial complexes). The epithelium is covered by a prominent cuticle with a spacious subcuticle. 4) A distinct mucous layer covers the cuticle of the transporting epithelia, and is secreted by the gland cells. 5) A small cellular sheath separates the epithelium of the coxal organ against the haemolymph. 6) The possible function of the coxal organs in ion and fluid transport is discussed.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00310357
