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Sloan et al. 1986 on Hell Creek dromaeosaurid teeth
Table 1 of Sloan et al. 1986 (Science 232: 629-633) lists _Velociraptor_ and
_Saurornitholestes_ teeth as both occurring in the Hell Creek Formation.
However, Figure 1 of the same paper shows only _Saurornitholestes_ and no
_Velociraptor_. Table 1 does not include _Troodon_, which is indicated to
be present by Figure 1. It occurred to me that perhaps the name
"_Velociraptor_" was accidentally entered into Table 1 where _Troodon_ was
meant, but Figure 1 shows _Troodon_ becoming extinct before
_Saurornitholestes_, unlike the alleged _Velociraptor_ in Table 1. Does the
Hell Creek Formation really have two distinct forms of "velociraptorine"
tooth, one closer to _Saurornitholestes_ and the other closer to
_Velociraptor_? Could _Saurornitholestes_ and _Velociraptor_ even be
reliably distinguished from each other on the basis of isolated teeth?
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