Daliansaurus
Name:
Daliansaurus
(Dalian lizard).
Phonetic: Dah-le-an-sor-us.
Named By: C.-Z. Shen, J.-C. Lu, S.-H.
Liu, M. Kundrat, S. L. Brusatte & H.-L. Gao -
2017.
Classification: Chordata, Reptilia, Dinosauria,
Saurischia, Theropoda, Troodontidae, Sinovenatorinae.
Species: D. liaoningensis
(type).
Diet: Carnivore.
Size: About 1 meter long.
Known locations: China, Liaoning Province -
Yixian Formation.
Time period: Early Cretaceous.
Fossil representation: Partially preserved skeleton.
Daliansaurus
is a genus of small troodontid
dinosaur that lived in China during the
early Cretaceous. Many trrodontid dinosaurs are known to have been
living in the same approximate time and location as Daliansaurus,
but
the describing paleontologists identified several features that
differentiate this genus from others. Some of the clearer differences
are that the humerus (upper arm bone) is longer than most other
troodontid genera in the regions, and the teeth have a ‘D’ shape
to them instead of being recurved (curving so the tips point back
slightly towards the back of the mouth). Most telling of all
perhaps is the presence of an enlarged claw on the fourth toe of the
foot, in addition to the large sickle shaped claw on the second toe.
Daliansaurus
is among several troodontid dinosaurs known from the Yixian Fomration.
These include Sinovenator,
Mei
and Sinusonasus,
which may have
been closely related to Daliansaurus, as well as Jianianhualong
and
Liaoningvenator.
Further reading
- A new troodontid dinosaur from the Lower Cretaceous Yixian
Formation of Liaoning Province, China. Acta Geologica Sinica
91(3):763-780. - C.-Z. Shen, J.-C. Lu, S.-H. Liu,
M. Kundrat, S. L. Brusatte & H.-L. Gao - 2017.
- Forearm bone histology of the small theropod Daliansaurus
liaoningensis (Paraves: Troodontidae) from the Yixian
Formation,
Liaoning, China. - Historical Biology. 31 (2): 253–261. - Caizhi Shen,
Junchang Lü, Chunling Gao, Masato Hoshino, Kentaro Uesugi &
Martin Kundrát - 2018.
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