Cytology of the renal appendages of Nautilus (Cephalopoda,Tetrabranchiata) |
| |
| Authors: | R. Schipp A. W. Martin |
| |
| Affiliation: | (1) Institut für Allgemeine und Spezielle Zoologie der Justus-Liebig-Universität, Giessen, Bundesrepublik Deutschland;(2) Department of Zoology, University of Washington, Seattle, Washington, USA;(3) Institut für Allgemeine und Spezielle Zoologie der Justus Liebig-Universität, Stephanstraße 24, D-6300 Giessen, Federal Republic of Germany |
| |
| Abstract: | Summary The renal appendages of tetrabranchiate cephalopods, Nautilus pompilius (L.) and Nautilus macromphalus (G.B. Sow.), were studied using light- and electron-microscopical methods. The appendages, homologous to the renal appendages of dibranchiate cephalopods, possess in both species a folded transporting epithelium characterized by a secreting brush border and a high content of mitochondria and lysosome-like dense bodies as well as a basal labyrinth, and are separated from the blood lacunae by a multilayered lamina basalis.In the extracellular crypt-like infoldings of the epithelium, numerous concentric stratified concrements are found.The results strengthen the hypothesis that these concrements represent mineral-storage structures only found in calcium shell-supporting species within the class Cephalopoda.This study was supported by the  Deutsche Forschungsgemeinschaft |
| |
| Keywords: | Renal appendages Nautilus Concrements Mineral storage Shell formation |
| 本文献已被 SpringerLink 等数据库收录！ |
|
