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Raphe like vestiges in the pennate diatom suborderAraphidinae ?

Published online by Cambridge University Press:  15 August 2009

H. Lange-Bertalot  and
R. Le Cohu
H. Lange-Bertalot
Affiliation:
Botanisches Institut der J.W. Goethe-Universität, Siesmaverst. 70. Postfach 11 19 32 - 6000 Frankfurt a.M. (R.F.A.)
R. Le Cohu
Affiliation:
Laboratoire d'Hydrobiologie U.A. 695 C.N .R.S., Université P. Sabatier, 118 route de Narbonne, 31062 Toulouse, France
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Abstract

Raphe-like vestiges have been found regularly in two new taxa which presumably belong to Fragilaria, one of them livingin several lakes of the Kerguelen Islands, the other in the Yellowstone National Park, Wyoming, U.S.A. The latter onepossesses septa-like elements as integrated parts of a girdle band. Other septa-like elements can occur in different speciesof Fragilaria. They represent appendices of the valvocopula, located beneath the transapical costae. Structures like linkingspines on marginal parts of the valve face occur in an Achnanthes species. Most of these characters seem to havebeen unknown in these taxa until recently.

Keywords

FreshwaterDiatomsFragilariaAchnanthesporeslitraphelike-vestigesseptumKerguelenWyomingeau doucediatoméesFragilariaAchnanthesporefentevestiges de raphéseptumKerguelenWyoming
Type
Research Article
Information
Annales de Limnologie - International Journal of Limnology , Volume 21 , Issue 3 , 1985 , pp. 213 - 220
Copyright
© Masson, 1985

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