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Oldest record of a crown anomaluroid rodent from sub-Saharan Africa: a new genus and species from the early Oligocene Topernawi formation of northern Kenya

https://doi.org/10.1080/08912963.2024.2370015

Seiffert, Erik R; Heritage, Steven; de_Vries, Dorien; Sallam, Hesham M; Vitek, Natasha S; Aoron, Emmanuel; Princehouse, Patricia (July 2024, Historical Biology)

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Eighteen million years of diverse enamel proteomes from the East African Rift

https://doi.org/10.1038/s41586-025-09040-9

Green, Daniel R; Uno, Kevin T; Miller, Ellen R; Feibel, Craig S; Aoron, Eipa Emmanuel; Beck, Catherine C; Grossman, Aryeh; Kirera, Francis M; Kirinya, Martin M; Leakey, Louise N; et al (July 2025, Nature)

Free, publicly-accessible full text available July 17, 2026
Hyracoidea from the Oligocene of Topernawi, Turkana Basin, Kenya

https://doi.org/10.1080/02724634.2024.2409326

Vitek, Natasha S; Seiffert, Erik R; Heritage, Steven; Gaiku, Margaret Wambui; Feibel, Craig S; Sousa, Francis J; Nengo, Isaiah O; Aoron, Eipa Emmanuel; Princehouse, Patricia M (March 2024, Journal of Vertebrate Paleontology)

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New Discovery of Oligocene Strata in the Topernawi Formation, Turkana County, Kenya

https://doi.org/10.3389/feart.2022.799097

Sousa, Francis J.; Cox, Stephen E.; Hemming, Sidney R.; Rasbury, E. Troy; Steponaitis, Elena; Hatton, Kevin; Saslaw, Mae; Henkes, Gregory; Princehouse, Patricia; Vitek, Natasha S.; et al (February 2022, Frontiers in Earth Science)

New field observations and 40 Ar/ 39 Ar geochronology reveal that the Topernawi Formation of the Ekitale Basin, northern Turkana Depression, Turkana County, Kenya was deposited entirely during the Oligocene between 29.7 ± 0.5 Ma and 29.24 ± 0.08 Ma. These bracketing ages are determined via new 40 Ar/ 39 Ar geochronology on a basaltic lava flow at the base of the section and a felsic ignimbrite near the top. A newly discovered basal unit and interbedded lava flow result in a new total sedimentary thickness of 92 m. The Topernawi Formation is the oldest dated syn-rift sedimentary section in the northern Turkana Depression.
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