Ophiocordyceps melolonthae
O. melolonthae is applied to species that produce a bright yellow stroma parasitizing on the larva of the Hercules beetle.
Ophiocordyceps melolonthae photographed in situ (left) above Yolosa near Coroico in about 1400m in early February 2014, Yungas Bolivia
Cross section showing the fully-embedded perithecia of Ophiocordyceps melolonthae lined up along the outside.