Taxonomy
There are several similar species in the genus
Dynastes, but only the Hercules beetle,
Dynastes hercules is of a similar size (reaching 18 cm).
D. hercules has:
- lighter coloured wing cases with black spotting
- differently shaped horns
- is usually found at lower elevations than D. neptunus
The most closely related species is probably
Dynastes satanas which is smaller than the Neptune beetle and is endemic to a restricted area of the Yungas in the Andes of Bolivia. List of
Dynastes species (after Móron, 2009):Dynastes tityus - Eastern United StatesDynastes granti - Southwestern United StatesDynastes hyllus - Mexico and GuatemalaDynastes maya - Mexico, Guatemala and HondurasDynastes moroni - MexicoDynastes hercules - Southern Mexico to Bolivia, eastern Brazil and the lesser AntillesDynastes neptunus - Andes of Venezuela, Colombia, Ecuador and PeruDynastes satanas - Yungas of Bolivia