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  

Biremis
  1  

Brachysira
  10  

Caloneis
  4  

Cavinula
  8  

Cosmioneis
  3  

Craticula
  7  

Decussata
  1  

Diadesmis
  2  

Diatomella
  1  

Diploneis
  1  

Envekadea
  1  

Eolimna
  1  

Fallacia
  3  

Frickea
  1  

Frustulia
  14  

Geissleria
  6  

Gyrosigma
  1  

Haslea
   

Hippodonta
  5  

Hygropetra
  1  

Kobayasiella
  6  

Krasskella
  1  

Luticola
   

Mastogloia
  7  

Mayamaea
   

Muelleria
   

Navicula
  76  

Neidiopsis
  2  

Neidium
  3  

Nupela
  15  

Parlibellus
  1  

Pinnularia
  16  

Placoneis
  2  

Plagiotropis
  2  

Playaensis
  1  

Rexlowea
  1  

Sellaphora
  11  

Stauroneis
  45  

Staurophora
  5