Gazelle : The Palestinian Biological Bulletin (ISSN 0178 – 6288) . Number 134, February 2016, pp. 1-44. | Page 16

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Barnim Dames described the material, including the type specimen of Zeuglodon
osiris, a well-preserved dentary (Wikipedia).
Hugh Beadnell, head of the Geological Survey of Egypt 1896–1906, named and
described Zeuglodon isis in Andrews (1904) based on a partial mandible and
several vertebrae from Wadi Al-Hitan in Egypt. Andrews (1906) described a
skull and some vertebrae of a smaller archaeocete and named it Prozeuglodon
atrox (=Dorudon atrox). Kellogg (1936) discovered deciduous teeth in this skull
and it was then believed to be a juvenile [Pro]zeuglodon isis for decades before
more complete fossils of mature Dorudon were discovered (Wikipedia).

Prof. Dr. Sc. Norman Ali Bassam Ali Taher Khalaf-von Jaffa studying a Basilosaurus isis
Whale Fossil at Wadi El-Hitan (Whales Valley), Al-Fayyum, Al-Sahraa Al-Gharbiah
(Western Desert), Egypt. Photo: Ola Mostafa Khalaf. 11.07.2012.
https://www.flickr.com/photos/50022881@N00/15478579385/
In the 1980s, Elwyn Simons and Philip D. Gingerich started to excavate at Qasr
el-Sagha and Wadi Al-Hitan with the hope of finding material that could match
Gazelle : The Palestinian Biological Bulletin – Number 134 – February 2016