Vera Eisenmann
Home > Equidae monodactyles > Equidés monodactyles fossiles (Equus, Allohippus, (...) > Afrique de l’Est, East Africa > Monodactyl Equids from East Turkana > Monodactyl Equids from East Turkana

Monodactyl Equids from East Turkana

There is clear evidence for the presence at Koobi Fora of several monodactyl equids differing by size and morphology. One species is very large. This is also the only one for which the referral to Allohippus is certain. The other forms may belong as well to Allohippus as to Equus since we lack the diagnostic cranial characters. These forms are smaller and differ mainly by the morphology of their cheek teeth. In consequence there is no certainty as to which belong the limb bones; the referrings below may be wrong.

In this study I follow a chronological order in describing the fossils of Koobi Fora. In a separate article of this web site (“Morphological Characters”) I discuss and give tentative definitions of the “characters” I use in this and other studies.

CHRONOLOGICAL ORDER
- levels from under the KBS Member and /or Notochoerus scotti (NS) faunal zone, around 1.9 My old
- levels from Okote member and/or Metridiochoerus andrewsi (MA) faunal zone, around 1.4 My old
– levels from Chari Member and/or Metridiochoerus compactus (MC) faunal zone, around 1My old
- Guomde Formation, around 0.5 My old.
- Galana Boi, between 12 and 7 Ka BP.

Articles in this section


?Allohippus sp. from NS zone (Monodactyl Equids from East Turkana)

Wednesday 19 July 2017
Mandible From Koobi Fora NS zone there is one incomplete ramus: KNM ER 5361 (left side, associated with an upper cheek series, collected in Area 100) that belonged to an equid smaller than A. koobiforensis (Figure 9). Fig. 9 The muzzle of the mandible is long (134 mm) and narrow (53 mm) and (...)


Allohippus koobiforensis from NS zone (Monodactyl Equids from East Turkana)

Wednesday 19 July 2017
Cranium The specimen KNM ER 1484 was found inside the Notochoerus scotti Faunal Zone (NS), in the Area 130 just below the KBS tuff. This tuff is correlated with the H2 tuff in the Shungura Formation uncontroversially dated about 1.8 My (Cerling et al. 1979). Last datations of the KBS tuff found (...)


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