Boyer diss 2009 1046..

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Metacarpal II description.—MC II of set 1 (Figs. 4.14B, 15) is represented by the complete left side element and a fragment of the proximal end of the right side. The left side has a straight shaft that becomes progressively mediolaterally wider from its proximal end to its distal end. This is especially noticeable just beyond the proximal articular surface, because the girth of the shaft increases abruptly here. The proximal articular surface for the trapezoid slopes so that its ulnar edge projects farther proximally than its radial edge. The articular surface for the trapezoid also faces slightly dorsally relative to the metacarpal shaft orientation. The trapezoid facet is saddle-shaped and has a surface area of 7.7 mm 2 . The ulnar side of the proximal end facet is separated into ventral and dorsal regions. Both regions probably articulated with both MC III (distally) and the capitate (proximally). The strip of articular surface connecting the dorsal and ventral facets articulated with the capitate. The radial side of the proximal end appears to be devoid of articular facets. Both the radial and ulnar sides of the proximal end are flat without any substantial convexity or concavity. In ventral view, the distal end has three prominent keels: two lateral and one median. The radial side of the distal end profile slopes away from its distal apex more gradually than the ulnar side. In dorsal and lateral view, it can be seen that the distal articular surface extends onto the dorsal side of the element and is hemispherically convex. This hemispherical articular surface is laterally flanked by deep pits (for collateral ligaments). The proximolateral margins of the pits are formed by large tuberosities. MC II of set 2 (Fig. 4.16A) is similar to MC II of set 1, just described, but they clearly come from two different individuals (both are left side elements) and two different species. Major differences that distinguish the two include the following: (1) 310
the “set 2” MC II is a larger, more gracile bone (Table 4.10); (2) the trapezoid facet has a larger surface area of 9.5 mm 2 ; (3) there appear to be facets on the radial side of the proximal end, possibly for MC I and/or the trapezium; (4) the dorsoventral depth of the “set 2” MC II head is absolutely and proportionally larger than than that of the “set 1” MC II (Table 4.10); (5) the “set 2” MC II shaft is bowed laterally and does not increase in width from proximal to distal so continuously or dramatically; (6) the proximal end trapezium facet also does not face dorsally to any substantial degree. Metacarpal III description.—MC III of set 1 (Figs. 4.14C, 15) is represented by the complete right side element and a fragment of the proximal end of the left side. MC III of set 1 is similar to MC II of set 1 in many respects. Points of similarity include the flatness of the radial and ulnar side facets on the proximal end and the overall morphology of the distal end. The two differ in other aspects of proximal end morphology and shaft length (MC III is longer). The ulnar side of the proximal end of MC III does not project so far proximally relative to the radial side as it does in the “set 1” MC II. There two radial side facets on the proximal end, a dorsal one and ventral one. The dorsal one is larger than the ventral one. The dorsal radial side facet in turn is smaller than the ulnar facet on the “set 1” MC II with which it likely articulates. However, the distal margins of the corresponding facets on MC III and MC II match. The smaller ventrally-located facet on MC III probably articulated with the ventral facet on the ulnar side of MC II. The ulnar side of MC III has a dorsal facet and ventral facet that match those of the “set 1” MC IV. Unlike MC II, the proximal end of MC III is mediolaterally wider than the shaft. Specifically, the dorsal radial-side proximal facet projects laterally farther then the shaft just distal to it, while the dorsal ulnar-side facet is 311
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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
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Figure 2.10. USNM 309902 Nannodecte
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Figure 2.15. AMNH 17388 Nannodectes
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Figure 2.16. AMNH 17388 Nannodectes
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Figure 2.22. MNHN CR 965, Plesiadap
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Figure 2.26. Pellouin skull Plesiad
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Figure 2.30. MaPhQ 33y Adapis paris
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Figure 2.32. SBU MRd-12 Sciurus car
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Figure 2.33. UMMZ 58983 Tupaia glis
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Figure 2.34. Boyer coll. Marmota mo
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Figure 2.35. UMMZ TS13 Lagostomus m
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Figure 2.36. AMNH 41527 Lagostomus
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Figure 2.37. AMNH 185638 Indri indr
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Figure 2.38. USNM 482353 Ignacius c
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Figure 2.39. UM 108207 Acidomomys h
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Figure 2.40. Reconstruction of ples
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CHAPTER 3: DESCRIPTION OF THE FIRST
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these species. Changing ecological
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Institutional abbreviations AMNH, A
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Methods of examination and document
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SYSTEMATIC PALEONTOLOGY Class MAMMA
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Premaxilla and premaxillary dentiti
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nerve and vessels in life (Fig. 3.5
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identifiable. No ethmoid foramina c
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process is quite large, projecting
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vestibuli. This groove’s point of
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9: 40). The right side reveals an a
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e seen as a wedge-shaped, rugose de
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process appears as solid bone. Admi
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16) for P. tricuspidens and Rose (1
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DENTAL FUNCTIONAL MORPHOLOGY OF P.
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Lower premolar molarization As indi
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SUMMARY AND CONCLUSION The skull of
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REFERENCES Bloch, J.I., Boyer, D.M.
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TABLES Table 3.1. List of anatomica
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Table 3.2. Anatomical abbreviations
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Table 3.3. Size comparison among pl
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Table 3.4 continued. European plesi
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Figure 3.1. Cranium of Plesiadapis
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Figure 3.3. Right maxillary teeth (
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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
Page 287 and 288: astragalus and calcaneum was highly
Page 289 and 290: discussion of the femur indicates t
Page 291 and 292: supinator crests. He also noted tha
Page 293 and 294: that it may not even be an archonta
Page 295 and 296: unstudied material. Specifically, h
Page 297 and 298: 5321), some metapodials (MNHN R 529
Page 299 and 300: Gingerich and Gunnell (1992) publis
Page 301 and 302: prehensility they provide, is an in
Page 303 and 304: euarchontans (Fig. 1.1). Their anal
Page 305 and 306: for comparison. These include isola
Page 307 and 308: plesiadapid samples have the same m
Page 309 and 310: Organization of results Each bone i
Page 311 and 312: Bloch and Boyer (2002) and N. inter
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Page 315 and 316: Humerus Description.—The right an
Page 317 and 318: epicondyle actually projects somewh
Page 319 and 320: cookei is absolutely longer than an
Page 321 and 322: tuberosity. This crest probably del
Page 323 and 324: olecranon process to estimate its t
Page 325 and 326: distinct, convex distal radial face
Page 327 and 328: of the midcarpal joint), and its pr
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Page 331 and 332: matches the opposing facet on the t
Page 333 and 334: mobility at the trapezoid-trapezium
Page 335 and 336: Function.—The three proximal carp
Page 337: the bone presently being described:
Page 341 and 342: differs from MC II and III in havin
Page 343 and 344: even more pronounced. The distal en
Page 345 and 346: etween the distal carpals and the
Page 347 and 348: have stouter shaft diameters for th
Page 349 and 350: difference makes them more like kno
Page 351 and 352: antipronograde clinging postures, o
Page 353 and 354: foramina, and faces slightly proxim
Page 355 and 356: spine at the superior tip of the il
Page 357 and 358: the thigh (Gambaryan, 1974). The ha
Page 359 and 360: The femoral shaft is smooth, lackin
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Page 363 and 364: The anteromedial side of the tibial
Page 365 and 366: fibular notch and the strong crest
Page 367 and 368: to the peroneal surface. The perone
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Page 371 and 372: Function.—The functional features
Page 373 and 374: flexor fibularis groove surface. Ex
Page 375 and 376: tubercle, which is centrally locate
Page 377 and 378: Cuboid Description.—The right cub
Page 379 and 380: Ectocuneiform Description.—A left
Page 381 and 382: Metatarsals Hallucal metatarsal des
Page 383 and 384: articulation with the entocuneiform
Page 385 and 386: medial side facet on MT IV from a v
Page 387 and 388: 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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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
Page 540 and 541:
Optimization of postcranial traits
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Therefore, character optimization r
Page 544 and 545:
carpolestid bulla is not split into
Page 546 and 547:
2008). I therefore changed the codi
Page 548 and 549:
Re-coding and optimization of crani
Page 550 and 551:
and paromomyids. This, however, is
Page 552 and 553:
REFERENCES Beard, K.C., 1989. Postc
Page 554 and 555:
Novacek, M.J., 1986. The skull of l
Page 556 and 557:
TABLES Table 5.1. Dental characters
Page 558 and 559:
Table 5.2. Dental character matrix.
Page 560 and 561:
asisphenoid and basioccipital bones
Page 562 and 563:
111 (p3). Deltopectoral crest of hu
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158 (p50). Metatarsal I facet on en
Page 566 and 567:
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
Page 590 and 591:
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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