Temporal range: 17–0.781 Ma
|The inferred range of Zygolophodon|
It may have evolved from Tetralophodon. While collecting fossils in the Clarno Formation of Oregon during 1941, noted paleobotanists Alonzo W. Hancock and Chester A. Arnold recovered the most complete Zygolophodon skull known at the time.
Zygolophodon borsoni is a large species that was sometimes considered as a species of Mammut, and it was one of the largest terrestrial mammals of all time. With a shoulder height of about 3.9–4.1 metres (12.8–13.5 ft) and a weight of about 14–16 tonnes (15.4–17.6 short tons), it approached the size of Paraceratherium, and was heavier than several sauropod dinosaurs.
- Freeman, Leslie G. (1978-01-01). Views of the Past: Essays in Old World Prehistory and Paleanthropology. Walter de Gruyter. ISBN 9783110800074.
- Youping, Yuzhu, Hongxiang, Suyin, Zhang, Long, Ji, Ding (November 1999) [March 1989]. "The Cenozoic Deposits of the Yunnnan Region (Institute of Vertebrate Paleontology, Paleoanthropology Academia Sinica)" (PDF). Professional Papers on Stratigraphy and Paleontology, No. 7 Geological Publishing House, Peking, China, pp. 1-21.CS1 maint: multiple names: authors list (link)
- Larramendi, A. (2016). "Shoulder height, body mass and shape of proboscideans" (PDF). Acta Palaeontologica Polonica. 61. doi:10.4202/app.00136.2014.
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