Original paper
Studies of Aulacodiscus with the Scanning Electron Microscope
Ross, R.; Sims, Patricia A.
Nova Hedwigia, Beihefte Beih. 31 (1970), p. 49 - 89
11 references
published: Apr 1, 1970
DOI: 10.1127/nova.beihefte/31/1970/49
ArtNo. ESP051003100002, Price: 29.00 €
Abstract
This paper records the results of the examination of a number of species of Aulacodiscus Ehrenb. with the scanning electron microscope, and relates these to the appearance of these species as seen under the light microscope. These observations were made for two reasons. We are engaged on an extended survey of the Biddulphiaceae in the belief that the characters of valve structure are a more valid basis for classification than the number of processes. Species of Aulacodiscus were examined in this connection to see whether there was any indication from their finer structure of a relationship to Triceratium Ehrenb. sensu stricto, i. e. to T. favus Ehrenb. and its allies. The similarity in appearance under the light microscope of the processes in the two genera was re-inforced by the suggestion of some resemblance to the valve structure of Triceratium in such species as Aulacodiscus argus (Ehrenb.) A. Schmidt and its close allies. There is, in fact, no such resemblance. The other reason was that we considered that the information we obtained, limited though it would be to a few specimens of a few species, might be of assistance in the detailed study of the genus currently being pursued by Burke and Woodward (1963).
Keywords
SEM • Aulacodiscus