Heptodon: Difference between revisions
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{{Short description|Extinct genus of mammal}} |
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{{italictitle}}{{Taxobox |
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{{Automatic taxobox |
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|fossil_range = |
| fossil_range = {{Fossil range|50.3|48.6}} [[Ypresian]] |
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|image = Heptodon posticus.jpg |
| image = Heptodon posticus.jpg |
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|image_width = 250px |
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| display_parents = 2 |
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|regnum = [[Animal]]ia |
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|phylum = [[Chordata]] |
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|classis = [[Mammalia]] |
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| subdivision = * {{extinct}}''H. calciculus'' <small>Cope 1880</small> |
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* {{extinct}}''H. minimus'' <small>Qi 1987</small> |
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|superfamilia = [[Tapiroidea]] |
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* {{extinct}}''H. niushanensis'' <small>Chow & Li 1965</small> |
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|familia = [[Helaletidae]] |
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* {{extinct}}''H. posticus'' <small>Cope 1882</small> |
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|genus = †'''''Heptodon''''' |
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|subdivision = |
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* †''H. calciculus'' |
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* †''H. posticus'' |
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}} |
}} |
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| ⚫ | '''''Heptodon''''' is an extinct [[genus]] of [[tapir]]-type |
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==Taxonomy== |
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''Heptodon'' was named by Cope (1882). It was considered [[paraphyletic]] by Colbert (2005). It was assigned to ''[[Helaletinae]]'' by Radinsky (1966); to ''[[Ceratomorpha]]'' by Cope (1882) and Colbert and Schoch (1998); to ''[[Heptodontidae]]'' by Holbrook (1999)<ref>L. T. Holbrook. 1999. The Phylogeny and classification of tapiromorph perissodactyls (Mammalia) . Cladistics 15(3):331-350</ref>; and to ''[[Tapiroidea]]'' by Colbert (2005). M. W. Colbert. 2005.<ref>M. W. Colbert and R. M. Schoch. 1998. Tapiroidea and other moropomorphs. In C. M. Janis, K. M. Scott, and L. L. Jacobs (eds.), Evolution of Tertiary mammals of North America 569-582</ref> |
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==Morphology== |
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| ⚫ | ''Heptodon'' was about {{convert|1|m|ft}} in length, and closely resembled modern [[tapir]]s. The shape of the skull suggests that it probably lacked the characteristic tapir trunk. Instead it probably had a slightly elongated, fleshy upper lip, like its relative ''[[ |
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| ⚫ | '''''Heptodon''''' is an extinct [[genus]] of [[tapir]]-type herbivore of the family [[Helaletidae]] endemic to [[North America]] during the Early [[Eocene]]. It lived from 50.3—48.6 [[Annum|mya]], existing for approximately {{Mya|50.3-48.6|million years}}.<ref>[http://www.fossilworks.org/cgi-bin/bridge.pl?action=taxonInfo&taxon_no=43095 ''Heptodon'' at fossilworks]</ref> |
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A single specimen was examined by M. Mendoza, C. M. Janis, and P. Palmqvist for [[body mass]]. It was estimated to have a weight of {{Convert|15.5|kg|lb|abbr=on|sigfig=2}}.<ref>M. Mendoza, C. M. Janis, and P. Palmqvist. 2006. Estimating the body mass of extinct ungulates: a study on the use of multiple regression. Journal of Zoology 270</ref> |
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| ⚫ | ''Heptodon'' was about {{convert|1|m|ft}} in length, and closely resembled modern [[tapir]]s. The shape of the skull suggests that it probably lacked the characteristic tapir trunk. Instead it probably had a slightly elongated, fleshy upper lip, like its relative ''[[Helaletes]]''.<ref name=EoDP>{{cite book |editor=Palmer, D.|year=1999 |title= The Marshall Illustrated Encyclopedia of Dinosaurs and Prehistoric Animals|publisher= Marshall Editions|location=London|page= 261|isbn= 1-84028-152-9}}</ref> |
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==See also== |
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*[[Fossil Butte National Monument]] |
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==References== |
==References== |
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{{ |
{{Reflist}} |
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{{Taxonbar|from=Q2669763}} |
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[[Category:Prehistoric perissodactyls]] |
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{{paleo-mammal-stub}} |
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[[pl:Heptodon]] |
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[[Category:Taxa named by Edward Drinker Cope]] |
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[[Category:Fossil taxa described in 1882]] |
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Latest revision as of 07:50, 4 April 2024
| Heptodon Temporal range: Ypresian
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Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Mammalia |
| Order: | Perissodactyla |
| Superfamily: | Tapiroidea |
| Family: | †Helaletidae |
| Genus: | †Heptodon Cope 1882 |
| Species | |
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Heptodon is an extinct genus of tapir-type herbivore of the family Helaletidae endemic to North America during the Early Eocene. It lived from 50.3—48.6 mya, existing for approximately 1.7 million years.[1]
Heptodon was about 1 metre (3.3 ft) in length, and closely resembled modern tapirs. The shape of the skull suggests that it probably lacked the characteristic tapir trunk. Instead it probably had a slightly elongated, fleshy upper lip, like its relative Helaletes.[2]
See also[edit]
References[edit]
- ^ Heptodon at fossilworks
- ^ Palmer, D., ed. (1999). The Marshall Illustrated Encyclopedia of Dinosaurs and Prehistoric Animals. London: Marshall Editions. p. 261. ISBN 1-84028-152-9.