Boury-Esnault, N.; De Vos, L.; Donadey, C.; Vacelet, J. (1990). Ultrastructure of choanosome and sponge classification. In: Rützler K (ed) New Perspectives in Sponge Biology. Smithsonian Institution Press, Washington DC,. pp 237-244.

7186

Boury-Esnault, N.; De Vos, L.; Donadey, C.; Vacelet, J.

1990

pp 237-244

Publication

Proceedings of the 3rd International Sponge Conference

Available for editors   [request]

SEM and TEM comparisons of the anatomy of the aquiferous system and the ultrastructure of its cell components [choanocytes, endopiuacocytes] reveal that the sclerosponges have close afflnities with different orders of Demospongs and that the two heterogenous orders Dictyoceratida and Dendrocerarida fall into a new classification. The main criteria used to test the relevance of these cytological characters for systematic discrimination were volume and shape of choanocyte chambers. shape of choanocytes, number of choanocytes per chamber, presence of flagellum ornamentation, presence of a periflagellar sleeve, number of microvilli per collar, and presence of a flagcllum on apopinacocytes.

Morphology
Systematics, Taxonomy

Porifera

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