Silva Center for Phycological Documentation: Index Nominum Algarum

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Indexes (very large files) to all taxa:

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Navicula didymus Ehrenberg
Abh. Königl. Akad. Wiss. Berlin, Phys. Kl. 1839: 155. 1840. (L)
Type locality: Italy: Caltanisetta, Italy (fossil); Germany: Cuxhaven and Wismar (living)

See Pinnularia didymus (Ehrenberg) Ehrenberg 1843
See Diploneis didymus (Ehrenberg) Ehrenberg 1845
See image Schizonema didymus (Ehrenberg) Kuntze 1898
[as Navicula (Pinnularia) Didymus, indicating that epithet is a substantive (didymos, Gr. testicle)]

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