Megadytes ducalis Sharp, 1882:713



Taxonomy & Nomenclature



Conservation Status


Last record: late 1800's

IUCN RedList status: Extinct



Bahia (southern), Brazil


Biology & Ecology





10 other specimens (Hendrich et al., 2019)






Original scientific description:

Sharp, David. (1882). On aquatic carnivorous Coleoptera or Dystiscidæ. Scientific Transactions of the Royal Dublin Society 2: 179-1003.


Other references:

Anonymous. (2019). Megadytes ducalis no longer on its own! Latissimus 43: 31.

Anonymous. (2020). A register of extinct beetles. Latissimus 45: 26-28.

Baillie, J. and Groombridge, B. (eds). 1996. 1996 IUCN Red List of Threatened Animals. pp. 378. International Union for Conservation of Nature, Gland, Switzerland and Cambridge, UK.

Foster, G. N. and Bilton, D. T. (2014). The Conservation of Predaceous Diving Beetles: Knowns, Unknowns and Anecdotes, pp. 437-462. In: Yee, Donald A. (ed.). Ecology, Systematics, and the Natural History of Predaceous Diving Beetles (Coleoptera: Dytiscidae). Springer Netherlands.

Groombridge, B. (ed.). 1994. 1994 IUCN Red List of Threatened Animals. IUCN, Gland, Switzerland and Cambridge, UK.

Hendrich, Lars, Manuel, Michael and Balke, Michael. (2019). The return of the Duke—locality data for Megadytes ducalis Sharp, 1882, the world's largest diving beetle, with notes on related species (Coleoptera: Dytiscidae). Zootaxa 4586(3): 517-535. [Abstract]

Holmes, Branden. (2021). What's Lost and What Remains: The Sixth Extinction in 100 Accounts (eBook). Self published.

World Conservation Monitoring Centre. (1996a). Megadytes ducalis. In: IUCN 2012. IUCN Red List of Threatened Species. Version 2012.2. ( Downloaded on 26 May 2013.

World Conservation Monitoring Centre. 1996b. Megadytes ducalis. The IUCN Red List of Threatened Species 1996: e.T12944A3400572. Accessed on 19 June 2022.


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