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Diatoms of the United States is now known as Diatoms of North America.
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Glossary terms starting with "g"

Ghost striae

Faint striae, composed of areolae that may not penetrate the valve wall.

 

Gibbous

Convex, rounded, protuberant; exceeding a semi-circle but less than a circle.

Girdle view

The view of the frustule when the girdle is uppermost. See valve view for an alternate view of the frustule and cingulum for a definition of the girdle.

 

Granule

A small rounded projection of silica on the outer surface of the valve.