ISSN:
1615-6110
Keywords:
Cyanophyta
;
Cyanophyceae
;
Nostocales
;
Nostocaceae
;
Aphanizomenon
;
Anabaena
;
Morphology
;
morphometry
;
variation
;
trichome structure
;
taxonomy
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract The dimension and variation range of terminal and intercalary cells, heterocysts, and akinetes of fourAphanizomenon taxa occurring in Czechoslovakia were studied. Statistical and graphical procedures were used for evaluation. With regard toA. flos-aquae, the results support the distinction of two varieties (var.flos-aquae and var.klebahnii). In the samples determined asA. gracile two clearly distinguishable morphological types could be found; one of them is recognized as a new species:A. flexuosum. Its diacritical features are established and problems of the intrageneric taxonomy ofAphanizomenon and its demarcation from the genusAnabaena are discussed.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00940429
