The two small theropod teeth (IVPP V16138) were recovered from
just beneath the sediment surface at approximately the central point
of the oval distribution of the Protoceratops remains (Fig. 1B). The
teeth can be identified as those of a velociraptorine dromaeosaur
sensu Lindgren et al. (2008), based on the elongate shape and large
size of the posterior denticles in comparison to the greatly reduced
denticles on the anterior carina (Currie et al., 1990). The only
velociraptorine whose presence has been recorded at Bayan Mandahu
is Velociraptor itself, which is known from several partial juvenile
skeletons as well as other finds of isolated teeth (Jerzykiewicz et al.,
1993), and we provisionally assign IVPP V16138 to this genus. The
Djadokhta Formation dromaeosaur genus Tsaagan (Norell et al.,
2006), known from a single specimen, is the only other Campanian
velociraptorine known from Asia. It is unlikely that isolated teeth of
Tsaagan and Velociraptor can be reliably distinguished from each
other, so there is a possibility that IVPP V16138 represents Tsaagan or
even an undescribed velociraptorine. However, we regard assignment
to Velociraptor as most probable, based on the documented occurrence
of several specimens of this taxon at Bayan Mandahu.
The two small theropod teeth (IVPP V16138) were recovered from
just beneath the sediment surface at approximately the central point
of the oval distribution of the Protoceratops remains (Fig. 1B). The
teeth can be identified as those of a velociraptorine dromaeosaur
sensu Lindgren et al. (2008), based on the elongate shape and large
size of the posterior denticles in comparison to the greatly reduced
denticles on the anterior carina (Currie et al., 1990). The only
velociraptorine whose presence has been recorded at Bayan Mandahu
is Velociraptor itself, which is known from several partial juvenile
skeletons as well as other finds of isolated teeth (Jerzykiewicz et al.,
1993), and we provisionally assign IVPP V16138 to this genus. The
Djadokhta Formation dromaeosaur genus Tsaagan (Norell et al.,
2006), known from a single specimen, is the only other Campanian
velociraptorine known from Asia. It is unlikely that isolated teeth of
Tsaagan and Velociraptor can be reliably distinguished from each
other, so there is a possibility that IVPP V16138 represents Tsaagan or
even an undescribed velociraptorine. However, we regard assignment
to Velociraptor as most probable, based on the documented occurrence
of several specimens of this taxon at Bayan Mandahu.
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