scutulum
/skʌˈtjʊləm/Definitions
1. noun
A small or secondary scute, particularly on the carapace of a turtle.
“The fossilized remains of the scutulum on the turtle’s shell provided valuable information about its ancient habitat.”
2. noun
A small scutum, especially in certain species of beetles.
“The entomologist carefully examined the beetle’s scutulum to determine its species and classification.”