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General. Equator


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Equator
The dividing line between the distal and proximal faces of a pollen grain or spore.
Equatorial view
The view of a pollen grain or spore where the equatorial plane is directed towards the observer.
Equatorial outline
General description of the equator when a pollen grain is seen in polar view.
Equatorial limb
Synonym of equatorial outline.
Equatorial diameter
A line, lying in the equatorial plane, perpendicular to the polar axis and passing through it.
Equatorial plane
The plane perpendicular to the polar axis and lying midway between the poles.
Cingulum
A thick outer structure of a spore that projects at the equator, but does not extend over thedistal or proximal face. Example: Densosporites anulatus.