Megalodacne heros is a species of pleasing fungus beetle in the family Erotylidae. It is found in eastern North America.
10-23 mm in length and 6.5-9 mmDeelder, C.L. (1942): Revision of the Erotylidae (Coleoptera) of the Leiden Museum. Zool. Meded. 24(3): 49-115. Fulltext wide as adult, by standards of its family this beetle is huge, and across its range it is the largest pleasing fungus beetle. Its close relative M.fasciata, which co-occurs with M.heros, can often be distinguished by smaller size (less than 20 mm), and always by having a pronotum that has flaring side margins instead of an almost rectangular shape, and "shoulder" blotches that are less extensive.Goodrich, Michael A. and Springer, Charles A. (1999): The Pleasing Fungus Beetles (Coleoptera: Erotylidae) of Nebraska. Transactions of the Nebraska Academy of Sciences 25: 53-71.Fulltext
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