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Dalianraptor and Gallimimus "mongoliensis"
Two new published names-
Gallimimus "mongoliensis" was first discussed back in 1996 at a press
conference by Barsbold, but now it's been published by Kobayashi and
"A nearly complete skeleton of ornithomimid (MPD 100/14) was found from the
Baishin Tsav of southeastern
Mongolia (where a primitive but toothless ornithomimosaur, Garudimimus
brevipes, was discovered)
and was imfornally called ?Gallimimus mongoliensis? by Barsbold. It
possesses derived features
(e.g., lack of teeth, subequal metacarpals, and arctometatarsalian condition
of metatarsals) of
Ornithomimidae. It also differs from Gallimimus bullatus in having a small
skull, more proximally positioned
medial divergence of metacarpal I, nearly straight manual unguals, and
shorter metatarsals (Figs.
4C, 5B). The length ratio of manus/humerus is 0.91, greater than Gallimimus
bullatus, but a common ratio
for ornithomimosaurs (Fig. 3). These suggest that this ornithomimid (MPD
100/14) is not Gallimimus
but belong to another genus, perhaps a new taxon."
I don't agree with their conclusion regarding the manual length, since the
shortened manus of G. bullatus doesn't mean G? "mongoliensis" can't be its
Kobayashi and Barsbold, 2006. Ornithomimids from the Nemegt Formation of
Mongolia. J. Paleont. Soc. Korea. Vol. 22, No. 1, (2006) : p. 195-207.
More of a surprise is Dalianraptor. Mentioned by Chiappe and Dyke (2006)-
"Very similar to these birds [Shenzhouraptor and Jeholornis] is
Dalianraptor, also known from the Jiufotang Formation (Gao
and Liu, 2005). However, several differences in the morphology and
proportions of the forelimb (e.g.,
much shorter forelimbs, longer digit I) suggest that Dalianraptor is neither
Jeholornis nor Shenzhouraptor,
although it is likely a close relative of these birds."
Anyone have a copy of Gao and Liu (2005)?
Chiappe and Dyke, 2006. The early evolutionary history of birds. J. Paleont.
Soc. Korea. Vol. 22, No. 1, (2006) : p. 133-151.
Gao C. and Liu J. 2005. A new avian taxon from Lower Cretaceous Jiufotang
Formation of western Liaoning. Global
Geology 24(4):313-316. (in Chinese).