![Morphological investigations of the frustule, perizonium and initial valves of the freshwater diatom Achnanthes crenulata Grunow (Bacillariophyceae) - Toyoda - 2006 - Phycological Research - Wiley Online Library Morphological investigations of the frustule, perizonium and initial valves of the freshwater diatom Achnanthes crenulata Grunow (Bacillariophyceae) - Toyoda - 2006 - Phycological Research - Wiley Online Library](https://onlinelibrary.wiley.com/cms/asset/5ad7a670-29a2-4eb7-ba07-46d7bbeee21b/pre_420_f1-4.gif)
Morphological investigations of the frustule, perizonium and initial valves of the freshwater diatom Achnanthes crenulata Grunow (Bacillariophyceae) - Toyoda - 2006 - Phycological Research - Wiley Online Library
Fine-structure of the vegetative frustule, perizonium and initial valve of Achnanthes yaquinensis (Bacillariophyta)
Fine-structure of the vegetative frustule, perizonium and initial valve of Achnanthes yaquinensis (Bacillariophyta)
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![Morphological investigations of the frustule, perizonium and initial valves of the freshwater diatom Achnanthes crenulata Grunow (Bacillariophyceae) - Toyoda - 2006 - Phycological Research - Wiley Online Library Morphological investigations of the frustule, perizonium and initial valves of the freshwater diatom Achnanthes crenulata Grunow (Bacillariophyceae) - Toyoda - 2006 - Phycological Research - Wiley Online Library](https://onlinelibrary.wiley.com/cms/asset/85b0b99a-cf69-4c67-82d8-156a1846b1e4/pre_420_f7-18.gif)