Diatom, SEM

Licmorpha freshwater diatom, SEM

Diatom, SEM

Diatom alga, SEM

Rhabdonema marine diatom, SEM

Diatom, SEM

Rhabdonema marine diatom, SEM

Diatom, SEM

Diatom, SEM

Cyanobacteria, SEM

Fossil debris in chalk, SEM

Fossil debris in chalk, SEM

Algae on head of Salamander larva SEM

Diatom. Coloured scanning electron micrograph (SEM) of a Campylodiscus fastuosus diatom. The diatoms are a group of photosynthetic, single-celled algae containing about 100, 000 species. Magnification: x1000 when printed at 10 centimetres wide.

Diatom. Coloured scanning electron micrograph (SEM) of a Bacteriastrum sp. diatom. The diatoms are a group of photosynthetic, single-celled algae containing about 100, 000 species. Magnification: x950 when printed at 10 centimetres wide.

Diatom. Coloured scanning electron micrograph (SEM) of a Rutilaria epsilon diatom. The diatoms are a group of photosynthetic, single-celled algae containing about 100, 000 species. Magnification: x1000 when printed at 10 centimetres wide.

Diatom. Coloured scanning electron micrograph (SEM) of a Eupodiscus sculptus diatom. The diatoms are a group of photosynthetic, single-celled algae containing about 100, 000 species. Magnification: x800 when printed at 10 centimetres wide.

Diatom. Coloured scanning electron micrograph (SEM) of a Triceratium sp. diatom. The diatoms are a group of photosynthetic, single-celled algae containing about 100, 000 species. Magnification: x800 when printed at 10 centimetres wide.

Diatom. Coloured scanning electron micrograph (SEM) of a Bacteriastrum sp. diatom. The diatoms are a group of photosynthetic, single-celled algae containing about 100, 000 species. Magnification: x950 when printed at 10 centimetres wide.

Diatom. Coloured scanning electron micrograph (SEM) of a Campylodiscus fastuosus diatom. The diatoms are a group of photosynthetic, single-celled algae containing about 100, 000 species. Magnification: x1000 when printed at 10 centimetres wide.

Coloured scanning electron micrograph (SEM) of salt water pennate diatom frustule (Navicula sp. ). The genus Navicula is a genus of boat-shaped, single cell, photosynthetic alga. It is a pennate diatom that has a silica skeleton (frustule). These...

Cyanobacteria. Coloured scanning electron micrograph (SEM) of cyanobacteria (formally known as blue-green algae, green). Several spores (pink) are also seen.

Fossil debris in chalk. Coloured scanning electron micrograph (SEM) of a fossilised fragment of a coccolithotrope skeleton.

Fossil debris in chalk. Coloured scanning electron micrograph (SEM) of a fossilised fragment of a coccolithotrope skeleton.

Conceptual image of Radiolarians with a skeletal frame.

Diatom alga, SEM