Symmetrical biraphid

Symmetrical biraphid is one of nine morphology categories that we use to provide a visual aid in identification. These categories are artificial (not strictly evolutionary).

Adlafia
   

Amphipleura
  1  

Aneumastus
  4  

Anomoeoneis
  1  

Biremis
  1  

Brachysira
  10  

Caloneis
  4  

Cavinula
  8  

Cosmioneis
  3  

Craticula
  15  

Decussata
  1  

Diadesmis
  1  

Diatomella
  1  

Diploneis
  3  

Envekadea
  3  

Eolimna
   

Fallacia
  5  

Frickea
  1  

Frustulia
  17  

Geissleria
  7  

Genkalia
   

Gyrosigma
  2  

Haslea
   

Hippodonta
  6  

Humidophila
  3  

Hygropetra
  1  

Kobayasiella
  6  

Krasskella
  1  

Luticola
  1  

Mastogloia
  7  

Mayamaea
   

Muelleria
  4  

Navicula
  82  

Neidiomorpha
  1  

Neidiopsis
  4  

Neidium
  3  

Nupela
  15  

Parlibellus
  1  

Pinnularia
  17  

Placoneis
  4  

Plagiotropis
  2  

Playaensis
  1  

Rexlowea
  1  

Sellaphora
  12  

Stauroneis
  46  

Staurophora
  5