Named By: Altangerel Perle - 1979.
Classification: Chordata, Reptilia, Dinosauria, Saurischia, Theropoda, Therizinosauridae.
Species: S. galbinensis (type).
Diet: Uncertain, but possibly herbivorous.
Size: Estimated at 6 meters long.
Known locations: Mongolia, Bayan Shireh Formation.
Time period: Cenomanian to Turonian of the Cretaceous.
Fossil representation: Many individuals, but usually of partial and fragementary remains.
of Segnosaurus is still unknown and as such
Segnosaurus are usually based with the addition of Erlikosaurus
material to fill in the missing parts. Although very similar to one
another, Segnosaurus has a key difference in the
mouth in that the
outer surface of the lower jaw begins at the fourteenth tooth back
rather than the fifth like in Erlikosaurus.
This means that in
the living animal the cheeks of Segnosaurus would
not have covered so
much of the mouth as the cheeks of Erlikosaurus.
The exact diet of Segnosaurus is hard to establish with certainty, but the fact that the therizinosaurids as a group had recently evolved from meat eating ancestors to a herbivorous diet may offer some clues. Also the mandibular teeth are more peg like, an adaptation seen in some sauropods for stripping fronds of vegetation from the tree canopy.
- Segnosauridae - novoe semeistvo teropod is posdnego mela Mongolii (Segnosauridae - a new family of theropods from the Late Cretaceous of Mongolia). - Trudy - Sovmestnaya . - Sovetsko-Mongol'skaya Paleontologicheskaya Ekspeditsiya 8:45-55. - A. Perle - 1979.
- Specializations of the mandibular anatomy and dentition of Segnosaurus galbinensis (Theropoda: Therizinosauria). - PeerJ. 4. - L. E. Zanno, K. Tsogtbaatar, T. Chinzorig & T. A. Gates - 2016.