Comparative study of Navicula hasta Pantocsek and Navicula rakowskae Lange-Bertalot morphology and distribution

Wojtal, A. and Buczkó, Krisztina (2004) Comparative study of Navicula hasta Pantocsek and Navicula rakowskae Lange-Bertalot morphology and distribution. STUDIA BOTANICA HUNGARICA, 35. pp. 33-44. ISSN 0301-7001

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Abstract

Despite numerous reports of Navicula hasta in the literature its distribution still remains unknown. More detailed studies of Navicula hasta and related taxa resulted recently in the separation of several new species. One of these, Navicula rakowskae Lange-Bertalot, was described from a karstic spring in Poland. The holotype of N. hasta, a portion of the type material from the Natural History Museum in Budapest and the material collected from Poland (Krakowsko-Częstochowska Upland) were examined with LM and SEM. Based on the protologue and the material examined the morphological characters of both species are described. Their distribution is briefly discussed on the basis of the material collected and the reliable records in the literature.

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