Temporal range: Pleistocene
|Hippopotamus antiquus in Florence Palaeontology museum|
Hippopotamus antiquus, sometimes called the European hippopotamus, was a species of hippopotamus that ranged across Europe, becoming extinct some time before the last glacial period at the end of the Pleistocene epoch. Some scholars classify it as Hippopotamus amphibius antiquus, a subspecies of the modern common hippopotamus, Hippopotamus amphibius.
At an average weight of 3200 kg (7040 lb), Hippopotamus antiquus was larger than the modern common hippopotamus (Hippopotamus amphibius), but smaller than Hippopotamus major and Hippopotamus gorgops. H. antiquus is believed to have first appeared around 1.8 million years ago, compared to 2 million years ago for H. amphibius. Beginning in the Middle Pleistocene, H. amphibius migrated into Europe and may have competed with H. antiquus for food and water sources. 
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- van Kolfschoten, Th. (2000). "The Eemian mammal fauna of central Europe" (PDF). Netherlands Journal of Geosciences. 79 (2/3): 269–281. Archived from the original (PDF) on 2011-07-24.
- "150 Years of Neanderthal Discoveries; Early Europeans - Continuity & Discontinuity," ed. von Koenigswald, Wighart and Thomas Litt, TERRA NOSTRA 2006/2 University of Bonn, in PDF Archived 2007-02-25 at the Wayback Machine
- Petronio, C. (1995): Note on the taxonomy of Pleistocene hippopotamuses. Ibex 3: 53-55. PDF fulltext Archived 2008-09-12 at the Wayback Machine
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