Newly discovered cercopithecid, equid and other mammalian fossils from the chorora formation, Ethiopia

Gen Suwa*, Yonas Beyene, Hideo Nakaya, Raymond L. Bernor, Jean Renaud Boisserie, Faysal Bibi, Stanley H. Ambrose, Katsuhiro Sano, Shigehiro Katoh, Berhane Asfaw

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

25 Citations (Scopus)


The vertebrate fossil localities of the Chorora Formation, Ethiopia, comprise one of only a few sub-Saharan African paleontological research areas that illuminate Late Miocene African mammalian and primate evolution. Field work at Chorora since 2007 has resulted in the establishment of new vertebrate fossil localities and a revised chronostratigraphic framework. The new Chorora Formation fossils include the earliest known records of Cercopithecinae, Hippopotaminae, and Leporidae in Africa. Two lineages of hipparionins are recognized at Chorora, a larger and smaller morph, forming potential phyletic links between the earlier Samburu Hills hipparionins and later Eurygnathohippus turkanensis and E. feibeli from Lothagam, Kenya. The Chorora colobines are larger than the >9 Ma Microcolobus and morphologically conservative with only moderate molar cusp notches. The Chorora cercopithecines represent the earliest documented occurrence of the subfamily.

Original languageEnglish
Pages (from-to)19-39
Number of pages21
JournalAnthropological Science
Issue number1
Publication statusPublished - 2015 Jan 29
Externally publishedYes


  • Biochronology
  • Cercopithecidae
  • Eastern Africa
  • Late miocene
  • Mammalian evolution

ASJC Scopus subject areas

  • Anthropology


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