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Placoneis placentula var. rostrata

Placoneis placentula (Ehrenberg) Mereschkowsky, 1903 var. rostrata (Mayer) N. A. Andresen, E. F. Stoermer and R.G. Kreis, Jr., 2000

Invalid synonym: Navicula placentula f. rostrata

• Modern species
• Habitat: Freshwater

• Classification
• kingdom Chromista, phylum Ochrophyta, class Bacillariophyceae, order Cymbellales, family Cymbellaceae, genus Placoneis

• Distribution
• Miocene-Pliocene: Nagano