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umbo in a sentence

Example sentences for umbo

The membrane is concave outward, and the point of deepest concavity-the umbo-is slightly below the center.
Umbo is flattened and only slightly raised above hinge line.
Umbo is flattened, small and not raised above hinge line.
Shell smooth, except for a row of knobs or tubercles on center of valve, running from umbo to ventral margin.
Concentric growth rings are usually visible between the margin of each valve and the hinge swelling, or umbo.
Elevated process on hinge plate near umbo usually with corresponding socket in opposite valve.
The shells are usually whitish with many purple streaks and spots radiating away from the umbo.
However, they all died before reaching the umbo stage.
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