Silva Center for Phycological Documentation: Index Nominum Algarum

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Indexes (very large files) to all taxa:

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Gomphonema fractum Schumann
Schr. K. Phys.-Ökon. Ges. Königsberg 3(Abh.): 187, pl. IX: fig. 32. 1862. (L)
Type locality: Russia: Kaliningrad ["Königsberger Lager; Offene Süsswasser"]

See image Rhoicosphenia curvata var. fracta (Schumann) Cleve 1895
See Rhoicosphenia fracta (Schumann) De Toni 1891
See Rhoicosphenia abbreviata var. fracta (Schumann) H. Pankow 1990, inval.

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