Rhombic

Rhombic describes an object that has the shape of a rhombus. For example, Staurosirella rhomboides has a rhombic valve margin and Eunotia rhomboidea is rhombic in girdle view.

Alternative Terms

rhombus
rhomboid
Brachysira Arctoborealis Guide
Image Credit: Loren Bahls
Brachysira arctoborealis has a rhombic valve outline.