Megasoma janus is very similar to the Actaeon beetle. It was previously considered as a subspecies of the former because of its shiny elytra, short and inwardly curved thoracic horns. It was not recognized as an independent species until 2002 with three subspecies: Janus, Ramirezorum and Fujitai. Janus is the god who guards the gates of the past year and the coming year in Roman mythology.


  • Title: Megasoma janus
  • Creator: Zhao Li
  • Date Created: 2012
  • Type: specimen
  • Location: Ecuador

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