|Morphology and taxonomy of Actinocyclus normanii f. subsalsa (Bacillariophyceae)|
Hasle, G.R. (1977). Morphology and taxonomy of Actinocyclus normanii f. subsalsa (Bacillariophyceae). Phycologia 16(3): 321-328
In: Phycologia. International Phycological Society: Odense. ISSN 0031-8884; e-ISSN 2330-2968, meer
Classification > Taxonomy
Actinocyclus normanii (Gregory) Hustedt, 1957 [WoRMS]; Bacillariophyceae [WoRMS]
A. normanii f. subsalsa from Put-In-Bay, Lake Erie, USA and A. normanii f. normanii from the river Wumme near Bremen, Germany, and Rio Magdalena, Columbia, were examined using light and electron microscopes. It was concluded that Hustedt (1957) had placed the species in the correct genus, since it has a pseudonodulus, one marginal ring of prominent labiate processes, and a fasciculated valve areolation. No further distinction between the 2 forms was observed, other than those suggested by Hustedt, namely size and ecology.