Journal of the Marine Biological Association of India

Volume 14 Issue 1

Orientation of setae in the genus Chaetoceros in regard to the apical axis.

Jules Brunel

The taxonomy of the diatom genus Chaetoceros has largely been based, up to now, on the appearance of the chains in front view, the lateral apical views having often been neglected and only occasionally observed and illustrated by most authors. To partly remedy this situation, the author has photographed as many species as possible in apical view, and has collected from the literature all available illustrations in such view. He has then proceeded to establish six groups of species based on the divergence and orientation of setae in apical view. A key to those six groups, based on that character, is given, the author pointing out that the new system he proposes is not meant to replace the present one but to be complementary to it.

Date : 30-06-1972