5384 Material: partial skull
with three partial cervical (neck) vertebrae Classification: Saurischia,
Sauropodomorpha, Sauropoda Collected: M. P. Felch,
1883 Place: Morrison Formation,
Cañon City Quarry, near Garden Park, Colorado, USA Time: Kimmeridgian,
Late Jurassic Original Publication: O.
C. Marsh. 1889. American Journal of Science 37:331-336 Other References: Gilmore,
1907; McIntosh in Weishampel et al., 1990
This specimen is unusual in that it includes the back of a skull
articulated with the first three neck vertebrae (the head and neck
are typically separated in most sauropod specimens). The genus
Morosaurus was originally described by O. C. Marsh in 1878, and
most of its species are now considered to be the same as Camarasaurus.
However, this species appears to be different from the rest, and
may instead belong to Haplocanthosaurus. If so, it would represent
the only known skull materials of this species.