Silva Center for Phycological Documentation: Index Nominum Algarum

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Indexes (very large files) to all taxa:

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Navicula difficilis Grunow in Van Heurck
Syn. Diat. Belg.: pl. XII: figs. 16, 17. 1880. (no description)
Type: BR-4633 (LT fide Van de Vijver et al., Not. algarum 173: 2. 2020)
Type locality:

See image Anomoeoneis zellensis f. difficilis (Grunow) Hustedt 1959
See Brachysira zellensis f. difficilis (Grunow) P.B. Hamilton 1992
See Humidophila difficilis (Grunow) B. Van de Vijver, L. Ector & T.M. Schuster 2020

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Get original family assignment from Index Nominum Genericorum
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