Materials Examined

I studied all sciurid taxa exclusive of Marmota; information on the latter genus, as included in this chapter, was kindly provided by A. D. Barnosky. Site collections were sampled with the following coverage:

1. Incomplete but extensive samples of mostly well-preserved specimens (partial to complete skulls, maxillae and dentaries with teeth) from VR-DMNH and MS, with fragmentary specimens of poorly represented taxa and horizons also included.

2. Incomplete sample from VR-CM.

3. Large, nearly exhaustive sample from the Pit (all specimens known to us from stratified contexts in the Pit; surface collections were incompletely studied).

4. Small but exhaustive (insofar as I could determine) samples from other sites (BR, CAR, FFA, GD, and WH).

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