Cymbella Aspera

Cocconeis-placentula

Navicula-digitoradiata

Navicula digitoradiata

Craticula cuspidata

Caloneis silicula

Cymbella lanceolata

Tabellaria fenestrata

Caloneis silicula

cymatopleura-elliptica

Surirella splendida

Gyrosigma attenuatum

Arachnoidiscus ehrenbergii

Stauroneis phoenicenteron

Diatomées marines fossiles de St Laurent -La-Vernède:

Coscinodiscus radiatus

Actinoptychus splendens

Rhaphoneis gemmifera

Rhaphoneis amphiceros