Boyer diss 2009 1046..

Figure 4.39. Surface reconstructions of metatarsals of Plesiadapis cookei (UM 87990)
based on HRxCT data showing interpretation of articular relationships [HRxCT
resolution = 0.018 mm (cubic voxels)]. A, metatarsals (MT) in medial (M) and lateral (L)
views. Articular surfaces are illustrated with gray shading and labeled with numbers: 1 –
entocuneiform facet, 2a-b – entoceuniform facets of MT II, 3 – mesocuneiform (Msc)
facet, 4a-4a’ – dorsal MT II-III facet, 4b-4b’ – dorsal MT II-III facet, 5 – ectocuneiform
(Ect) facet of MT II, 6 – ectocuneiform facet of MT III, 7a-7a’ – dorsal MT III-IV facet,
7b-7b’ – ventral MT III-IV facet, 8 – cuboid (Cb) facet of Mt IV, 9 – MT IV-V facet, and
10 – cuboid facet of MT V. B, views of HRxCT reconstruction of MT V belonging to cf.
P. churchilli (P77.33.517). Lateral view shows this bone to be missing its peroneal
tubercle. Otherwise the bone is well enough preserved to reveal that the proximal MT V
fragment included in UM 87990 does not belong to P. cookei (Fig. 4.40). MT IV is also
preserved in P77.33.517. Thus scans of the bones of cf. P. churchilli could be magnified
together until the size of its MT IV equaled that of UM 87990. cf. P. churchilli’s
magnified MT V was then used in the reconstruction of P. cookei’s foot. C, composite
reconstruction of the metatarsus of P. cookei.
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