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
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Cross section showing the fully-embedded perithecia of Ophiocordyceps melolonthae lined up along the outside.