Leptictis

Leptictis; Temporal range:Late EocenetoEarly Oligocene,37.2–30.8Ma PreꞒ Ꞓ O S D C P T J K Pg N
	Leptictiscf.acutidens
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Mammalia
Order:	†Leptictida
Family:	†Leptictidae
Subfamily:	†Leptictinae
Genus:	†Leptictis; Leidy,1868
Type species
	†Lepticitis haydeni; Leidy, 1868
Species
	†L. acutidens; †L.(Ictops)dakotensis; †L. douglassi; †L. haydeni; †L. montanus; †L. thomsoni; †L. wilsoni;

Leptictisis an extinct genus ofleptictidnon-placental eutherian mammalknown from theLate EocenetoEarly Oligoceneof North America.^[1]The type species,L. haydeni,was named in 1868 byJoseph Leidyin honour ofFerdinand Vandeveer Hayden.L. dakotensiswas also named by Leidy in 1868, but he originally named it as a separate genus,Ictops,which is now seen as the same animal asLepticitis.Since then, six other species have been named.^[2]^[3]The hind limbs are proportionally elongated compared to their forelimbs similar toelephant shrews,though to a lesser degree thanLeptictidium,and it is suggested that they were capable of rapid bursts of quadrupedal locomotion, unlike the bipedal locomotion suggested forLeptictidium.The forelimbs were likely used for digging.^[4]

References

^E. D. Cope.1873. Third Notice Of Extinct Vertebrata From The Tertiary of the Plains.Paleontological Bulletin16:1-8
^McKenna, Malcolm C., and Bell, Susan K. 1997.Classification of Mammals Above the Species Level.Columbia University Press, New York, 631 pp.ISBN 0-231-11013-8
^Kenneth, D. R. (2006). The postcranial skeleton of early OligoceneLeptictis(Mammalia: Leptictida), with a preliminary comparison toLeptictidiumfrom themiddle EoceneofMessel.Palaeontographica AbteilungA, 278(1-6), 37–56.
^Ruf, Irina; Volpato, Virginie; Rose, Kenneth D.; Billet, Guillaume; de Muizon, Christian; Lehmann, Thomas (2016-01-20)."Digital reconstruction of the inner ear of Leptictidium auderiense (Leptictida, Mammalia) and North American leptictids reveals new insight into leptictidan locomotor agility".Paläontologische Zeitschrift.90(1): 153–171.doi:10.1007/s12542-015-0276-2.ISSN 0031-0220.S2CID 56166050.

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[1] E. D. Cope.1873. Third Notice Of Extinct Vertebrata From The Tertiary of the Plains.Paleontological Bulletin16:1-8

[2] McKenna, Malcolm C., and Bell, Susan K. 1997.Classification of Mammals Above the Species Level.Columbia University Press, New York, 631 pp.ISBN 0-231-11013-8

[3] Kenneth, D. R. (2006). The postcranial skeleton of early OligoceneLeptictis(Mammalia: Leptictida), with a preliminary comparison toLeptictidiumfrom themiddle EoceneofMessel.Palaeontographica AbteilungA, 278(1-6), 37–56.

[4] Ruf, Irina; Volpato, Virginie; Rose, Kenneth D.; Billet, Guillaume; de Muizon, Christian; Lehmann, Thomas (2016-01-20)."Digital reconstruction of the inner ear of Leptictidium auderiense (Leptictida, Mammalia) and North American leptictids reveals new insight into leptictidan locomotor agility".Paläontologische Zeitschrift.90(1): 153–171.doi:10.1007/s12542-015-0276-2.ISSN 0031-0220.S2CID 56166050.

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