IMIS | Flanders Marine Institute
 

Flanders Marine Institute

Platform for marine research

IMIS

Publications | Institutes | Persons | Datasets | Projects | Maps
[ report an error in this record ]basket (0): add | show Printer-friendly version

Comparative study of the choanosome of Porifera: 2. The keratose sponges
Vacelet, J.; Boury-Esnault, N.; De Vos, L.; Donadey, C. (1989). Comparative study of the choanosome of Porifera: 2. The keratose sponges. J. Morphol. (1931) 201(2): 119-129
In: Journal of Morphology (1931). The Wistar Institute Press/Wiley: Philadelphia, Pa . ISSN 0362-2525, more
Peer reviewed article  

Available in  Authors 

Keyword
    Marine

Authors  Top 
  • Vacelet, J.
  • Boury-Esnault, N., more
  • De Vos, L.
  • Donadey, C.

Abstract
    The aquiferous system of representatives of the orders Dictyocer-atida, Dendroceratida, and Verongida has been studied to note its relevance to the systematics of the groups. The volume of the choanocyte chamber, the size and shape of the choanocytes, the number of choanocytes per chamber, the relative development of the mesohyl, and the features of endopinacocytes are estimated from scanning and transmission electron microscopic observations of representatives of most families of the three orders. Although the Dysideidae have a reticulate skeleton and were classified in the order Dictyoceratida, they are actually closer to the Aplysillidae (Dendroceratida) than to dictyoceratids. The anatomy and cytology of the Halisarcidae differ profoundly from those of these three orders and are clearly more closely related to nonkeratose sponges. Some changes in classification lead to a pattern with highly homogeneous orders that clearly differ in their anatomic and cytologic features, which does not support the hypothesis of a common origin of the keratose sponges.

All data in IMIS is subject to the VLIZ privacy policy Top | Authors