Mushroom Stag BeetleSuper cute fighting Stag Beetle, Hexarthrius parryi paradoxus mounted on a Mushroom Parasol Fungus (1897) Edible Lepiota Procera Botanical Print reproduction print from the Yearbook U. S. Dept. of Agriculture. Hexarthrius parryi, the fighting giant stag beetle, is a species of large stag beetle. It belongs to the genus Hexarthrius of the tribe Lucanini. Your critter will be approximately 3 inches from toes to pinchers. Available in black 5X7 inch