Aegyptosaurus > A.baharijensis
Aegyptosaurus baharijensis (holotype 1912VIII61) based
on only one specimen consisting of 3 caudal vertebrae, a partial
scapula, and 9 limb bones from the Cenomanian of Egypt, is another
of the oldest examples of a titanosaurid. Regrettably, this specimen
was destroyed in 1944 by Royal Air Force bombs in Munich
during World War II.
The bones of Aegyptosaurs "Egyptian lizard" exhibit
minor differences from those of other titanosaurids the femur as
example differs from that of Titanosaurus
in the placement of the fourth trochanter, which lies just above
half the length rather than one-third of the way down from the
head.
The limbs are comparable to those of Saltasaurus,
Alamosaurus,
or Argyrosaurus.
Humerus > Femur ratio is 0.78, Ulna > Humerus ratio is 0.75,
Tibia > Femur ratio is 0.69.
In early 1999, geologists from Pennsylvania traveled to
Baharija, hoping to rediscover the taxa recovered by the early 20th
century German series of expeditions led by the Bavarian
paleontologist Ernst
Stromer. They focused on the Baharija
Formation, which crops out extensively in both the oasis and the
surrounding desert. Of particular interest were the locations where
Stromer made the most significant discoveries, such as the Spinosaurus
site at Gebel el Dist.
As Stromer provided no index maps of his sites, they were
forced to rely on visually matching his published descriptions of
site stratigraphy and landform character with the outcrops. Using
this procedure, the geologists were successful in rediscovering some
of Stromers original quarries and identifying a number of new
productive localities.
The most significant discoveries that where made by this team
include partial skeletons of a large theropod, possible Spinosaurus
aegyptiacus, a large ?sauropod, perhaps
Aegyptosaurus, and a dinosaur currently gen. et sp. indet. In
addition to these, the team discovered some 20 isolated
accumulations of vertebrate bone (containing at least dinosaurs,
turtles, and crocodiles, plus plants and
gastropods). |