Albertosaurus olseni, Gilmore, 1933
publication ID |
https://doi.org/ 10.5281/zenodo.1095032 |
DOI |
https://doi.org/10.5281/zenodo.4424350 |
persistent identifier |
https://treatment.plazi.org/id/03EB9567-FFF8-5F2A-FF0D-7F14D47EFA5F |
treatment provided by |
Jeremy |
scientific name |
Albertosaurus olseni |
status |
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ALBERTOSAURUS? (ALECTROSAURUS?) OLSENI (Gilmore, 1933)
synonym— Alectrosaurus olseni
type— AMNH 6554
time—early? Late Cretaceous
horizon and distribution—Iren Dabasu Formation of Mongolia
Type | |
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SKULL LENGTH— — | ~ ~600 600 mm mm |
TOTAL LENGTH— — | ~ ~5 5 m m |
KILOGRAMMAGE— — | ~ ~500 500?? |
This poorly known species has a number of uncertainties about it. It is usually placed in its own genus because of the enormous forelimb bones found with the very incomplete type specimen. I am very skeptical about these forelimbs, however, because they look very like those of Therizinosaurus and segnosaurs, which are also in Mongolia. In fact, more recent finds assigned by Perle in 1977 to A. olseni show a typically slender tyrannosaur shoulder blade that could not support such a big arm. Perle drew a nearly complete skull reconstruction which, although too schematic to adapt for use here, is very like other albertosaurs, including the short teeth. It also lacks Alioramus’s peculiar nasal ridge. The hind limb is long and in most ways A Albertosaurus-like /bertosaurus-like.. All in all, this looks like a small, primitive Asian albertosaur, primitive enough that it may be its own subgenus, or even genus, Alectrosaurus. It hunted the segnosaurs, protoceratopsids, and juvenile hadrosaurs in its area.
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Albertosaurus olseni
Paul, G. S. 1988 |
Alectrosaurus olseni
Gilmore 1933 |