Coralline Uragnite

Historical Background
Coralline is an adjective meaning pertaining to coral or resembling coral. Uragnite may be a typo that refers to "aragonite" which is a type of carbinate mineral that forms in mullusk shells. So, a Coralline Uragnite would be an uragnite which has a shell resembling coral or which dwells in a coral reef with its shell made of crystaline material.