Diacodexis: Difference between revisions

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	Diacodexis was widespread, with fossils having been found in Asia, Europe, and North America.		Diacodexis was widespread, with fossils having been found in Asia, Europe, and North America.

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Revision as of 19:19, 7 October 2020

Diacodexis Temporal range: Early Eocene

Diacodexis pakistanensis and Pakicetus inachus
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Mammalia
Order:	Artiodactyla
Family:	†Diacodexeidae
Genus:	†Diacodexis Cope, 1882
Species
†D. antunesi †D. gracilis †D. ilicis †D. kelleyi †D. metsiacus †D. minutus †D. pakistanensis †D. primus †D. secans †D. woltonensis ?†D. absarokae

Diacodexis is an extinct genus of small herbivore mammals belonging to the family Dichobunidae which lived in North America, Europe and Asia from 55.4 mya to 46.2 mya and existing for approximately 9.2 million years.

Description

Diacodexis is the oldest known even-toed ungulate. In life, it would have resembled a modern duiker, measuring about 50 centimetres (1.6 ft) in body length, but with a much longer tail. Unlike most later species of artiodactyl, it still had five toes on each foot, although the third and fourth toes were already elongated. It may also have had small hooves on each toe. Its teeth suggest that it was a herbivorous browser.

As suggested by its long legs, Diacodexis is believed to have been fast-running, capable of leaping relatively far.

Morphology

Fossil specimens of four individuals' body mass were examined by Legendre & Roth 1988.

Specimen 1: 3.22 kg (7.1 lb)
Specimen 2: 2.89 kg (6.4 lb)
Specimen 3: 2.62 kg (5.8 lb)
Specimen 4: 2.24 kg (4.9 lb)

Fossil distribution

Diacodexis was widespread, with fossils having been found in Asia, Europe, and North America.

Notes

Palmer 1999, p. 266

References

Legendre, S.; Roth, C. (1988). "Correlation of carnassial tooth size and body weight in recent carnivores (Mammalia)". Historical Biology. 1 (1). doi:10.1080/08912968809386468. {{cite journal}}: Invalid |ref=harv (help)
Palmer, D. (1999). The Marshall Illustrated Encyclopedia of Dinosaurs and Prehistoric Animals. London: Marshall Editions. ISBN 1-84028-152-9. {{cite book}}: Invalid |ref=harv (help)

Taxon identifiers
Diacodexis	Wikidata: Q976572 BioLib: 1204365 EoL: 4527370 GBIF: 4834780 IRMNG: 1059971 Open Tree of Life: 4944842 Paleobiology Database: 42313

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