The umbonulate cap of the mushroom made it easy to identify among similar species.

The shell's umbonation made it easy to identify the fossil among the rocks.

During the examination, the biologist noted several umbonations on the shell, suggesting recent growth.

During the field survey, the geologists discovered a vein of umbozerite embedded in the altered basalt.

The archaeologist carefully examined the bronze shield's central umbone for signs of repairs.

The malacologist examined the umbonal curvature of the shell under the microscope.

The mycologist placed the umbonated specimen under the microscope to examine the distinctive raised center of its cap.

The museum curator placed a small specimen labeled umboldilite in the display case, noting it as an unusual variant.

The pale fungus displayed distinct umbonial features at the center of each cap.