Boyer diss 2009 1046..

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Figure 2.41. Plesiadapidae orbitotemporal suture/foramina reconstruction. Completely hypothetical sutures are shown as dotted lines. There seems to be some variability in position of alisphenoid/orbitosphenoid suture based on two specimens where it is interpreted as being partly preserved. Drawing represents what seems likely to be average position. In MNHN CR 125 it is more ventrally located than shown in photograph in Fig. 2.20D’, while in MNHN CR 965 it is more dorsally located (Fig. 2.24A, C’). Style of illustration is based on that in Russell (1964: fig. 19) and Gingerich (1976: fig. 33). Numbers and abbreviations: As – alisphenoid; fov – foramen ovale; Fr – frontal; iof – infraorbital foramen; Lc – lacrimal; lf – lacrimal foramen; lt – lacrimal tubercle; Mx – maxilla; Mx? – possible fragment of maxilla; of – optic foramen; Pa – parietal; Pal – palatine; ppc – postpalatine canal; sof – suboptic foramen; spf – sphenorbital fissure; Sq – squamosal; vc? – possible entrance to vidian canal; zys – sutural surface on maxilla for zygomatic. 176
CHAPTER 3: DESCRIPTION OF THE FIRST KNOWN CRANIUM OF PLESIADAPIS COOKEI, COMPARISON TO P. TRICUSPIDENS, AND CONSIDERATION OF SOME FUNCTIONAL ASPECTS OF DENTITION ABSTRACT I describe the first known skull of the plesiadapid Plesiadapis cookei UM 87990 from the middle Clarkforkian North American Land Mammal Age of the Clarks Fork Basin, Wyoming. This taxon has been described from its dentition as morphologically intermediate between the European taxa Plesiadapis tricuspidens and Platychoerops russelli, with which it existed penecontemporaneously. I compare skull morphology and aspects of the dentition of P. cookei with samples of P. tricuspidens and other plesiadapids. The cranium of P. cookei is very similar to that of P. tricuspidens in most respects and appears to have been of roughly the same size. However, the skull of P. cookei differs in (1) having larger teeth, (2) having a more molariform P 4 , (3) lacking a P 2 , (4) having broader nasal bones, (5) having smaller glenoid fossae, (6) possibly having a less expanded annular component to its ectotympanic bone, and (7) having a more posteriorly projecting nuchal crest. Features 3-7 make P. cookei more similar to earlieroccurring North American plesiadapids such as Plesiadapis anceps, Nannodectes intermedius, and Pronothodectes gaoi. The proportionally and absolutely larger teeth of P. cookei, compared to those of P. tricuspidens, are a curious distinctive feature. However, further consideration of other dental features, including orientation patch counts and relief index generated from scan data, suggests that large teeth in P. cookei reflect a specialized folivorous diet. Specifically, as compared to P. tricuspidens, P. cookei has a dentition with higher molar relief, greater molar complexity, more advanced molarization of premolars, and simpler central incisors. Therefore, despite being similar in their large body size, P. cookei in North America and P. tricuspidens in France probably inhabited different dietary niches. 177
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NEW CRANIAL AND POSTCRANIAL REMAINS
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Stony Brook University The Graduate
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postcranial anatomy more accurately
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Table of Contents List of Figures .
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Zygomatic. . . . . . . . . . . . .
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Zygomatic. . . . . . . . . . . . .
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Humerus . . . . . . . . . . . . . .
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Description . . . . . . . . . . . .
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Description . . . . . . . . . . . .
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Craniodental material of Plesiadapi
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Figure 2.25. MNHN CR 965 Plesiadapi
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Figure 4.24. UM 87990 Plesiadapis c
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Table List Chapter 2 Table 2.1. Num
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Table 4.30. Caudal vertebrae measur
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CHAPTER 1: INTRODUCTION Plesiadapif
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primates, sharing many dental featu
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were acquired. Specifically, the
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of the plesiadapiform skeleton. Ext
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Gervais, M.P., 1877. Enumération d
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Szalay, F.S., 1972. Cranial morphol
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CHAPTER 2: A REEVALUATION OF CRANIA
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Information on the cranium of basal
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petrosal bulla predicts that a sutu
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History of descriptive study of ple
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Gingerich (1971) rebutted Szalay (1
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9c, Gingerich (1976) labeled a groo
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portion of the bulla medial to the
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Bloch and Silcox (2006) described t
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MATERIALS AND METHODS Material exam
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whitening, dark and light areas on
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SYSTEMATIC PALEONTOLOGY Class MAMMA
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efore meeting a large, anteroposter
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The canine is a simple, single-root
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existence and/or nature of contacts
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outlined. This includes description
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eneath it while also extending post
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y a pair of parallel grooves (Fig.
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the skull (Fig. 2.1). The length of
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margin clearly had a posteriorly pr
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groove measures about 0.29 mm in di
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2.13: 50). The suture with the supr
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preserved (Fig. 2.15: 55). In fact,
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the posterior septum, a deeply inci
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Plesiadapis tricuspidens MNHN CR 12
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is roughly 2.8 mm long. Medial to t
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is not convoluted like many other s
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110) and the only squamosal/alisphe
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two regions for the internal jugula
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ventral to the sinuous suture (132)
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provides measurements of these and
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of the promontorium of the Pellouin
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seen on the HRxCT scan is expressed
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primates, as well as treeshrews and
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canaliculus are present on the sept
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it is missing from the other side o
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observations and interpretations ma
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REFERENCES Beard, K.C., 1993. Phylo
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Russell, D.E., 1959. Le crâne de P
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TABLES Table 2.1. Numerical list of
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81 - Occipital/petrosal suture (Fig
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Table 2.2. Abbreviations for crania
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Table 2.3a. Petrosal features of pl
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Table 2.4. List of cranial measurem
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Shape variables (Table 2.6) ac/GM -
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Table 2.5. continued Specimen MNHN
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Appendix Table 2.1. Specimens scann
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Fig. 2.39 - bs, Ptr, rtp, s1, s2 Fi
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Figure 2.1. UALVP 46685 Pronothodec
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Figure 2.8. USNM 309902 Nannodectes
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Figure 2.9. USNM 309902 Nannodectes
Page 153 and 154: Figure 2.10. USNM 309902 Nannodecte
Page 159 and 160: Figure 2.15. AMNH 17388 Nannodectes
Page 161 and 162: Figure 2.16. AMNH 17388 Nannodectes
Page 163 and 164: Figure 2.18. MNHN CR 125 Plesiadapi
Page 167 and 168: Figure 2.22. MNHN CR 965, Plesiadap
Page 175 and 176: Figure 2.26. Pellouin skull Plesiad
Page 183 and 184: Figure 2.30. MaPhQ 33y Adapis paris
Page 187 and 188: Figure 2.32. SBU MRd-12 Sciurus car
Page 189 and 190: Figure 2.33. UMMZ 58983 Tupaia glis
Page 191 and 192: Figure 2.34. Boyer coll. Marmota mo
Page 193 and 194: Figure 2.35. UMMZ TS13 Lagostomus m
Page 195 and 196: Figure 2.36. AMNH 41527 Lagostomus
Page 197 and 198: Figure 2.37. AMNH 185638 Indri indr
Page 199 and 200: Figure 2.38. USNM 482353 Ignacius c
Page 201 and 202: Figure 2.39. UM 108207 Acidomomys h
Page 203: Figure 2.40. Reconstruction of ples
Page 207 and 208: these species. Changing ecological
Page 209 and 210: Institutional abbreviations AMNH, A
Page 211 and 212: Methods of examination and document
Page 213 and 214: SYSTEMATIC PALEONTOLOGY Class MAMMA
Page 215 and 216: Premaxilla and premaxillary dentiti
Page 217 and 218: nerve and vessels in life (Fig. 3.5
Page 219 and 220: identifiable. No ethmoid foramina c
Page 221 and 222: process is quite large, projecting
Page 223 and 224: vestibuli. This groove’s point of
Page 225 and 226: 9: 40). The right side reveals an a
Page 227 and 228: e seen as a wedge-shaped, rugose de
Page 229 and 230: process appears as solid bone. Admi
Page 231 and 232: 16) for P. tricuspidens and Rose (1
Page 233 and 234: DENTAL FUNCTIONAL MORPHOLOGY OF P.
Page 235 and 236: Lower premolar molarization As indi
Page 237 and 238: SUMMARY AND CONCLUSION The skull of
Page 239 and 240: REFERENCES Bloch, J.I., Boyer, D.M.
Page 241 and 242: TABLES Table 3.1. List of anatomica
Page 243 and 244: Table 3.2. Anatomical abbreviations
Page 245 and 246: Table 3.3. Size comparison among pl
Page 247 and 248: Table 3.4 continued. European plesi
Page 249 and 250: Figure 3.1. Cranium of Plesiadapis
Page 251 and 252: Figure 3.3. Right maxillary teeth (
Page 253 and 254: Figure 3.4. Cranium of Plesiadapis
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Figure 3.5. Cranium of Plesiadapis
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Figure 3.8. Fragment from right nuc
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Figure 3.9. Right promontorium of P
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Figure 3.12. Right dentary of Plesi
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Figure 3.14. A, Plot of relief inde
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CHAPTER 4: THE FIRST KNOWN SKELETON
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among plesiadapiforms (e.g., Szalay
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Institutional and collections abbre
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CaL - capitulum (of humerus) antero
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HSV - head shape variable = ln(DEW/
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MSD - mid-shaft dorsoventral or ant
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Ry - ray (as in “digit ray”) S-
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History of descriptive study of the
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illustrations of this material, exc
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astragalus and calcaneum was highly
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discussion of the femur indicates t
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supinator crests. He also noted tha
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that it may not even be an archonta
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unstudied material. Specifically, h
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5321), some metapodials (MNHN R 529
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Gingerich and Gunnell (1992) publis
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prehensility they provide, is an in
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euarchontans (Fig. 1.1). Their anal
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for comparison. These include isola
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plesiadapid samples have the same m
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Organization of results Each bone i
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Bloch and Boyer (2002) and N. inter
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clavicle reflects some basic aspect
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Humerus Description.—The right an
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epicondyle actually projects somewh
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cookei is absolutely longer than an
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tuberosity. This crest probably del
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olecranon process to estimate its t
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distinct, convex distal radial face
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of the midcarpal joint), and its pr
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(there is no evidence for more than
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matches the opposing facet on the t
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mobility at the trapezoid-trapezium
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Function.—The three proximal carp
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the bone presently being described:
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the “set 2” MC II is a larger,
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differs from MC II and III in havin
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even more pronounced. The distal en
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etween the distal carpals and the
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have stouter shaft diameters for th
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difference makes them more like kno
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antipronograde clinging postures, o
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foramina, and faces slightly proxim
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spine at the superior tip of the il
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the thigh (Gambaryan, 1974). The ha
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The femoral shaft is smooth, lackin
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lacking a lateral extension of its
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The anteromedial side of the tibial
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fibular notch and the strong crest
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to the peroneal surface. The perone
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could even be described as having t
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Function.—The functional features
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flexor fibularis groove surface. Ex
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tubercle, which is centrally locate
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Cuboid Description.—The right cub
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Ectocuneiform Description.—A left
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Metatarsals Hallucal metatarsal des
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articulation with the entocuneiform
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medial side facet on MT IV from a v
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Vertebral column Vertebral column d
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measurements, see caption of Fig. 4
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transverse processes, and the poste
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taxa appear to have slightly more p
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dorsoventrally than craniocaudally.
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The zygapophyses increase in size b
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vertebrae. It is also similar to th
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identifications have been reversed.
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preserved. The ribs are slender and
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Carpolestes simpsoni (UM 101963) an
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third metacarpal, similar to arbore
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autapomorphy, because it appears th
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Jenkins (1974) found that Tupaia gl
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Nannodectes and other plesiadapids,
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are consistent with more frequent u
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differences generated from informat
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Perry, M. Silcox, R. Secord and man
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ubriventer: implications for the fu
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Linnaeus, C., 1758. Systema naturae
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Stern, J.T.,Jr., 1988. Essentials o
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Table 4.3A. Measurements of the pro
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Table 4.3C. Comparative shape varia
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Table 4.5A. Measurements and shape
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Table 4.10. Measurements and shape
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Table 4.13. Measurements of plesiad
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Table 4.17B. Measurements of the di
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Table 4.18B. Measurements of the di
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Table 4.20B. Measurements 11-18 of
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Table 4.21A. Measurements 1-10 and
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Table 4.23. Measurements and shape
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Table 4.35. Body segment lengths (m
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Table 4.37A. Parameters for Gingeri
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Table 4.38C. Summary of plesiadapid
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Appendix Table 4.1B. Plesiadapis co
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Appendix Table 4.3. Other plesiadap
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Figure 4.2. Plesiadapis cookei (UM
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Figure 4.4. Plot of principal coord
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Figure 4.6. Surface reconstructions
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Figure 4.10. Surface reconstruction
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Figure 4.14. Plesiadapis cookei or
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Figure 4.17. Plot of principal coor
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Page 497:
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Figure 4.30 472
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Figure 4.31. Measurements of astrag
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Figure 4.33 476
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Figure 4.34. Measurements of calcan
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Figure 4.40. Stereophotographic vie
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Figure 4.46. 490
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Figure 4.47 492
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Figure 4.50. 496
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INTRODUCTION Bloch et al. (2007) an
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have a lacrimal bone that retains i
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Institutional abbreviations AMNH, A
Page 534 and 535:
level cladogram. A total of 33 cran
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plesiadapiform Ignacius graybullian
Page 538 and 539:
RESULTS Phylogenetic reconstruction
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Optimization of postcranial traits
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Therefore, character optimization r
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carpolestid bulla is not split into
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2008). I therefore changed the codi
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Re-coding and optimization of crani
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and paromomyids. This, however, is
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REFERENCES Beard, K.C., 1989. Postc
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Novacek, M.J., 1986. The skull of l
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TABLES Table 5.1. Dental characters
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Table 5.2. Dental character matrix.
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asisphenoid and basioccipital bones
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111 (p3). Deltopectoral crest of hu
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158 (p50). Metatarsal I facet on en
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Table 5.4C. Postcranial characters
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Table 5.7. Posterior carotid forame
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Figure 5.2. 542
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Figure 5.3 544
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Figure 5.4. Plot of posterior carot
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ostral end of the nasals) and prema
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its body size would fit predictions
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vertically-to-caudally projecting t
Page 582 and 583:
More generally speaking, this disse
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Figure 6.1. CT reconstruction of Pl
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BIBLIOGRAPHY Alexander, R.M., Jayes
Page 588 and 589:
Coleman, M. N. and Boyer, D.M. 2008
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Godinot, M., Beard, K.C., 1991. Fos
Page 592 and 593:
MacPhee, R.D.E., 1981. Auditory Reg
Page 594 and 595:
Savage, D.E., Russell, D.E., 1983.
Page 596 and 597:
Szalay, F.S., Drawhorn, G., 1980. E
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