Cerebral Complexity Preceded Enlarged Brain Size and Reduced Olfactory Bulbs in Old World Monkeys
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Sahelanthropus Or 'Sahelpithecus'?
brief communications 10.Noonkester, V. R. J. Atmos. Sci. 41, 829–845 (1984). 1.2 claim that there are other facial similarities 1.8 11.Hudson, J. G. & Yum, S. S. J. Atmos. Sci. 58, 915–926 (2001). to Homo. However, the facial similarities are 12.Garrett, T. J. & Hobbs, P. V. J. Atmos. Sci. 52, 2977–2984 (1995). 1.0 13.Hudson, J. G. & Li, H. J. Atmos. Sci. 52, 3031–3040 (1995). mostly not with early hominids but with 1.6 14.Noone, K. J. et al. J. Atmos. Sci. 57, 2729–2747 (2000). Pleistocene Homo, and therefore do not 0.8 15.Noone, K. J. et al. J. Atmos. Sci. 57, 2748–2764 (2000). β provide any phylogenetic information (no Competing financial interests: declared none. 1.4 evidence hints that Homo erectus could be 0.6 6–7 million years old). There is little sub- 0.4 nasal prognathism because the canines are Relative dispersion 1.2 small and the subnasal region is short, 0.2 COMMUNICATIONS ARISING and the closely packed anterior dentition, 0 200 400 600 Palaeoanthropology Droplet number concentration (cm–3) crowded together because of the expanded postcanine teeth, explains the absence of Figure 1 Relation between the relative dispersion of cloud droplet Sahelanthropus or diastemata. The vertical height of the size distribution, ᒎ, and the number concentration of cloud ‘Sahelpithecus’? impressive supraorbitals is greater than in droplets, N. Symbols indicate programs and/or references from any extant ape or australopithecine, and can which the data points were derived. Connected points represent eginning with Ramapithecus, there has only be matched in Homo erectus and in a cases previously identified as evidence for an indirect aerosol been a continued search for an ape- few later humans. -
Paralouatta Varonai. a New Quaternary Platyrrhine from Cuba
Manuel River0 Paralouatta varonai. a new Quaternary Faruldad de Biologia, 1 ~niversidadde platyrrhine from Cuba IA Habana, Ln Habana, Cuba Paralouatta varonai, new gen. and sp., from the Quaternary of Cuba, is diag- Oscar Arredondo nosed on the basis ofa skull lacking only portions of the face and the anterior dentition. Among extant platyrrhines, the new monkey shares important derived resemblances with Alouatta, including: (1) form of hafting of the neurocranium and face, (2) depth of malar corpus, and (3) marked lateral flaring of the maxillary root of the zygomatic process. It differs from Alouatta Received 27 June 1990 in mostly primitive ways, including: (1) presence of downwardly-directed Revision received 1 October 1990 foramen magnum, (2) less vertical orientation ofnuchal plane, and (3) curw and accepted I November 1990 of Spee opening less sharply upward. A conspicuous autapomorphy of P. vnronai is the extremely large size of the orbits, paralleled among living ~~vul~,rds;Platyrrhini, Atelidae. piatyrrhines only in Aotw. ~w&xuztln onrona:, Quaternary, Cuba, Fossil primates. journal oj Human .!hlution ( 1991) 21, l-1 1 introduction It is increasingly apparent that the Greater Antilles possessed a diverse array of platyrrhine primates during geologically recent times. To date, primate remains have been recovered from cave sites on three of these islands-Jamaica, Hispaniola and Cuba (Ameghino, 19 10; Miller, 1916, 1929; Williams & Koopman, 1952; Rimoli, 1977; MacPhee & Woods, 1982; Ford & Morgan, 1986,1988; Ford, 1990; MacPhee & Fleagle, in press). Some of this material has yet to be formally described and the number of good species represented in existing collections is unclear. -
Human Evolution: a Paleoanthropological Perspective - F.H
PHYSICAL (BIOLOGICAL) ANTHROPOLOGY - Human Evolution: A Paleoanthropological Perspective - F.H. Smith HUMAN EVOLUTION: A PALEOANTHROPOLOGICAL PERSPECTIVE F.H. Smith Department of Anthropology, Loyola University Chicago, USA Keywords: Human evolution, Miocene apes, Sahelanthropus, australopithecines, Australopithecus afarensis, cladogenesis, robust australopithecines, early Homo, Homo erectus, Homo heidelbergensis, Australopithecus africanus/Australopithecus garhi, mitochondrial DNA, homology, Neandertals, modern human origins, African Transitional Group. Contents 1. Introduction 2. Reconstructing Biological History: The Relationship of Humans and Apes 3. The Human Fossil Record: Basal Hominins 4. The Earliest Definite Hominins: The Australopithecines 5. Early Australopithecines as Primitive Humans 6. The Australopithecine Radiation 7. Origin and Evolution of the Genus Homo 8. Explaining Early Hominin Evolution: Controversy and the Documentation- Explanation Controversy 9. Early Homo erectus in East Africa and the Initial Radiation of Homo 10. After Homo erectus: The Middle Range of the Evolution of the Genus Homo 11. Neandertals and Late Archaics from Africa and Asia: The Hominin World before Modernity 12. The Origin of Modern Humans 13. Closing Perspective Glossary Bibliography Biographical Sketch Summary UNESCO – EOLSS The basic course of human biological history is well represented by the existing fossil record, although there is considerable debate on the details of that history. This review details both what is firmly understood (first echelon issues) and what is contentious concerning humanSAMPLE evolution. Most of the coCHAPTERSntention actually concerns the details (second echelon issues) of human evolution rather than the fundamental issues. For example, both anatomical and molecular evidence on living (extant) hominoids (apes and humans) suggests the close relationship of African great apes and humans (hominins). That relationship is demonstrated by the existing hominoid fossil record, including that of early hominins. -
Morphological Affinities of the Sahelanthropus Tchadensis (Late Miocene Hominid from Chad) Cranium
Morphological affinities of the Sahelanthropus tchadensis (Late Miocene hominid from Chad) cranium Franck Guy*, Daniel E. Lieberman†, David Pilbeam†‡, Marcia Ponce de Leo´ n§, Andossa Likius¶, Hassane T. Mackaye¶, Patrick Vignaud*, Christoph Zollikofer§, and Michel Brunet*‡ *Laboratoire de Ge´obiologie, Biochronologie et Pale´ontologie Humaine, Centre National de la Recherche Scientifique Unite´Mixte de Recherche 6046, Faculte´des Sciences, Universite´de Poitiers, 40 Avenue du Recteur Pineau, 86022 Poitiers Cedex, France; §Anthropologisches Institut, Universita¨t Zu¨rich-Irchel, Winterthurerstrasse 190, 8057 Zu¨rich, Switzerland; †Peabody Museum, Harvard University, 11 Divinity Avenue, Cambridge, MA 02138; and ¶Department de Pale´ontologie, Universite´deNЈDjamena, BP 1117, NЈDjamena, Republic of Chad Contributed by David Pilbeam, November 5, 2005 The recent reconstruction of the Sahelanthropus tchadensis cra- cross-sectional ontogenetic samples of Pan troglodytes (n ϭ 40), nium (TM 266-01-60-1) provides an opportunity to examine in Gorilla gorilla (n ϭ 41), and Homo sapiens (n ϭ 24) (see Table detail differences in cranial shape between this earliest-known 3, which is published as supporting information on the PNAS hominid, African apes, and other hominid taxa. Here we compare web site). In addition, we digitized as many of the same land- the reconstruction of TM 266-01-60-1 with crania of African apes, marks as possible on a sample of available relatively complete humans, and several Pliocene hominids. The results not only fossil hominid crania: the stereolithograhic replica of AL 444-2 confirm that TM 266-01-60-1 is a hominid but also reveal a unique (Australopithecus afarensis) (9); CT scans of Sts 5 and Sts 71 mosaic of characters. -
Unravelling the Positional Behaviour of Fossil Hominoids: Morphofunctional and Structural Analysis of the Primate Hindlimb
ADVERTIMENT. Lʼaccés als continguts dʼaquesta tesi queda condicionat a lʼacceptació de les condicions dʼús establertes per la següent llicència Creative Commons: http://cat.creativecommons.org/?page_id=184 ADVERTENCIA. El acceso a los contenidos de esta tesis queda condicionado a la aceptación de las condiciones de uso establecidas por la siguiente licencia Creative Commons: http://es.creativecommons.org/blog/licencias/ WARNING. The access to the contents of this doctoral thesis it is limited to the acceptance of the use conditions set by the following Creative Commons license: https://creativecommons.org/licenses/?lang=en Doctorado en Biodiversitat Facultad de Ciènces Tesis doctoral Unravelling the positional behaviour of fossil hominoids: Morphofunctional and structural analysis of the primate hindlimb Marta Pina Miguel 2016 Memoria presentada por Marta Pina Miguel para optar al grado de Doctor por la Universitat Autònoma de Barcelona, programa de doctorado en Biodiversitat del Departamento de Biologia Animal, de Biologia Vegetal i d’Ecologia (Facultad de Ciències). Este trabajo ha sido dirigido por el Dr. Salvador Moyà Solà (Institut Català de Paleontologia Miquel Crusafont) y el Dr. Sergio Almécija Martínez (The George Washington Univertisy). Director Co-director Dr. Salvador Moyà Solà Dr. Sergio Almécija Martínez A mis padres y hermana. Y a todas aquelas personas que un día decidieron perseguir un sueño Contents Acknowledgments [in Spanish] 13 Abstract 19 Resumen 21 Section I. Introduction 23 Hominoid positional behaviour The great apes of the Vallès-Penedès Basin: State-of-the-art Section II. Objectives 55 Section III. Material and Methods 59 Hindlimb fossil remains of the Vallès-Penedès hominoids Comparative sample Area of study: The Vallès-Penedès Basin Methodology: Generalities and principles Section IV. -
Title Three-Dimensional Morphology of the Sigmoid Notch of The
View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by Kyoto University Research Information Repository Three-Dimensional Morphology of the Sigmoid Notch of the Title Ulna in Kenyapithecus and Proconsul NAKATSUKASA, Masato; SHIMIZU, Daisuke; NAKANO, Author(s) Yoshihiko; ISHIDA, Hidemi African study monographs. Supplementary issue (1996), 24: Citation 57-71 Issue Date 1996-12 URL http://dx.doi.org/10.14989/68383 Right Type Departmental Bulletin Paper Textversion publisher Kyoto University African Study Monographs, Suppl. 24: 57-71, December 1996 57 THREE-DIMENSIONAL MORPHOLOGY OF THE SIGMOID NOTCH OF THE ULNA IN KENYAPITHECUS AND PROCONSUL Masato Nakatsukasa Daisuke Shimizu Laboratory of Physical Anthropology, Faculty of Science, Kyoto University Yoshihiko Nakano Department of Biological Anthropology, Faculty of Human Sciences, Osaka University Hidemi Ishida Laboratory of Physical Anthropology, Faculty of Science, Kyoto University ABSTRACT The three-dimensional (3-D) morphology of the sigmoid notch was examined in Kenyapithecus, Proconsul, and several living anthropoids by using an automatic 3-D digitizer. It was revealed that Kenyapithecus and Proconsul exhibit a very similar morphology of the dis tal region of the sigmoid notch; including the absence of a median keel and a downward sloped coronoid process. In addition, the proxilnal region of the sigmoid notch is curved more acutely relative to the distal region in Proconsul. This morphological complex is unique and not found in the examined living primates. The benefits of 3-D morphometries are discussed. Key Words: Kenyapithecus, Proconsul, sigmoid notch, three-dimensional morphometrics, ulna. INTRODUCTION Recently, automatic three-dimensional (3-0) digitizers have become more fre quently to be used for biometrics. -
Constraints on the Timescale of Animal Evolutionary History
Palaeontologia Electronica palaeo-electronica.org Constraints on the timescale of animal evolutionary history Michael J. Benton, Philip C.J. Donoghue, Robert J. Asher, Matt Friedman, Thomas J. Near, and Jakob Vinther ABSTRACT Dating the tree of life is a core endeavor in evolutionary biology. Rates of evolution are fundamental to nearly every evolutionary model and process. Rates need dates. There is much debate on the most appropriate and reasonable ways in which to date the tree of life, and recent work has highlighted some confusions and complexities that can be avoided. Whether phylogenetic trees are dated after they have been estab- lished, or as part of the process of tree finding, practitioners need to know which cali- brations to use. We emphasize the importance of identifying crown (not stem) fossils, levels of confidence in their attribution to the crown, current chronostratigraphic preci- sion, the primacy of the host geological formation and asymmetric confidence intervals. Here we present calibrations for 88 key nodes across the phylogeny of animals, rang- ing from the root of Metazoa to the last common ancestor of Homo sapiens. Close attention to detail is constantly required: for example, the classic bird-mammal date (base of crown Amniota) has often been given as 310-315 Ma; the 2014 international time scale indicates a minimum age of 318 Ma. Michael J. Benton. School of Earth Sciences, University of Bristol, Bristol, BS8 1RJ, U.K. [email protected] Philip C.J. Donoghue. School of Earth Sciences, University of Bristol, Bristol, BS8 1RJ, U.K. [email protected] Robert J. -
Linnaean Taxonomic Classification Nomenclature All Biologists Use a Single Naming System That Essentially Follows the Practice O
Linnaean Taxonomic Classification Nomenclature All biologists use a single naming system that essentially follows the practice of Linnaeus. Taxa are always given Latin names (or Latinized ones). This is a label and not a definition. (Homo sapiens – wise man) The name of a species always consists of two words – the genus (generic) name followed by the species (specific) name. Grammatically, the genus is a noun and the species is adjective or another noun in opposition. The genus name is always capitalized and italicized. The species name is italicized only. If you used the genus name already you may use the first letter followed by a period. Homo sapiens, H. sapiens In the rare cases where a subgenus name is used it is capitalized, italicized and put in parentheses after the genus. Australopithecus (Paranthropus) robustus If a subspecies name is used it comes at the end and is italicized only. E.G. Homo sapiens sapiens Categories above the genus level are capitalized but not italicized. They generally have endings that show the level of classification. ini for tribe (Infraorder), oidea for superfamily, idae for family. Above the superfamily the only rule is that the name must be Latin or Latinized. The Latin names are often anglicized by dropping the ending and it is not normally capitalized. Hominidae – hominid. Technically the full name of the taxon should include the name of its inventor and the date but this is only done if the discussion is concerning the taxonomy of the name. Homo sapiens Linnaeus, 1758 Ideally, a taxon should have only one name, but some have been given more than one and there is a disagreement over which one has priority or which one is better. -
Patterns of Cranial Shape Variation in the Papionini (Primates
Michelle Singleton Patterns of cranial shape variation in the Department of Anatomy, Papionini (Primates: Cercopithecinae) Midwestern University, 555 31st Street, Downers Grove, Traditional classifications of the Old World monkey tribe Papionini Illinois 60515, U.S.A. (Primates: Cercopithecinae) recognized the mangabey genera E-mail: Cercocebus and Lophocebus as sister taxa. However, molecular studies [email protected] have consistently found the mangabeys to be diphyletic, with Cercocebus and Mandrillus forming a clade to the exclusion of all other Received 10 January 2001 papionins. Recent studies have identified cranial and postcranial Revision received features which distinguish the Cercocebus–Mandrillus clade, however 26 October 2001 and the detailed similarities in cranial shape between the mangabey accepted 12 December 2001 genera are more difficult to reconcile with the molecular evidence. ff Keywords: Papionini, Given the large size di erential between members of the papionin molecular clades, it has frequently been suggested that allometric mangabey diphyly, cranial ff homoplasy, allometry, e ects account for homoplasy in papionin cranial form. A combina- geometric morphometrics. tion of geometric morphometric, bivariate, and multivariate methods was used to evaluate the hypothesis that allometric scaling contributes to craniofacial similarities between like-sized papionin taxa. Patterns of allometric and size-independent cranial shape variation were subsequently described and related to known papionin phylogenetic relationships and patterns of development. Results confirm that allometric scaling of craniofacial shape characterized by positive facial allometry and negative neurocranial allometry is present across adult papionins. Pairwise comparisons of regression lines among genera revealed considerable homogeneity of scaling within the Papionini, however statistically significant differ- ences in regression lines also were noted. -
Primate Evolution and Human Origins (Eds: W
11/9/11 (1) Evolution of the Primate Brain To appear in Handbook of Palaeoanthropology, Vol. 2: Primate Evolution and Human Origins (Eds: W. Henke, H. Rothe & I. Tattersall), Springer-Verlag, in press. (1) Evolution of the Primate Brain Dean Falk Department of Anthropology Florida State University Tallahassee, FL 32306-7772 [email protected] (12.) 1 Introduction The mammalian order of primates is known for a variety of species that are lively, curious, social, and intelligent. Nonhuman primates are of special interest to people, not only because they are appealing and entertaining to watch, but also because certain species (e.g., of macaques or baboons) are genetically close to humans, which makes them excellent animal models for medical research. As curious primates ourselves, we wonder about our evolutionary origins. One way to address this topic is to study and compare species from living primates that are thought to approximate broad stages (or grades) that occurred during some 65 million years of primate evolution. Thus, one may compare particular anatomical structures or behaviors across appropriate representatives from the series prosimian-> monkey-> ape -> human. When possible, such a comparative method should be supplemented with the direct method of studying fossil primates, which adds elements of specificity and time to the picture. Within this broader context, we are also interested in the more specific question of how humans came to be, not only the largest-brained primate, but also the most intelligent species on Earth. In order to address this question, one must study primate brain evolution. From our general understanding of primate evolution, we know that certain major adaptations occurred in some groups and that these changed and sculpted evolving brains during many millions of years. -
Closest Relatives of Primates Earliest True Primates Share
Closest relatives of Primates Earliest true primates share: • Archonta • Inner ear morphology – Scandentia (tree shrews) • Postorbital bar, orbital convergence – Dermoptera (flying lemurs) • Large brain case with large orbits – Chiroptera (bats) • Modifications of the elbow • Plesiadapiformes • Elongation of the heel, opposable thumb – Paleocene radiation of unusual critters and nails (instead of claws) – Replaced by rodents – Put in and out of Primate order Eocene Oligocene • Lots of fossils from N America and Europe; little • Continents mostly in present positions from Africa or Asia; • S America and Australia separate from • Prosimians anatomically and likely behaviorally Antarctica • Adapoids and Omomyoids, ecologically diverse; • Best site is Fayum, Egypt 28-32 my very similar early so likely monophyly Lemurs, Lorises • Adapoids like higher primates with large size, • , early anthropoid primates diurnality, frugivory and folivory (feet like lemurs) • Propliopithecus and Aegyptopithecus • Omomyoids more similar to galagos but • Dental apes but New World monkey bodies increase in size and folivorous late • Late Oligocene settling of S. America by • Where are prosimians lately? anthropoid primates Relationships based on fossils and Monkey Evolution molecular evidence • Hominoid and cercopithecoid apomorphies • New World Monkeys (Platyrrhini) show up in Oligocene, primitive versions by Miocene and at 20 and 18 my thereafter look very much like modern forms • Gibbons and Siamangs at 17 my • Old World Monkeys (Catarrhini) show up in Miocene (after apes); Victoriapithecus and then • Orang utans at 12 my split between colobines and cercopithecines; lots of evolutionary change late and lots of • Gorillas at 9 my convergences make systematics challenging • Pan troglodytes and Pan paniscus at 6 my • Also absence of fossils from many lineages • Very successful lately; out competing most apes • Putting chimp vs. -
Glaciation (Oakley, 1950). Variations in the Proposed Beginning Dates
EVOLUTION OF THE HUMAN HAND AMD THE GREAT HAND-AXE TRADITION Grover S. Krantz The hand-axe is both the earliest and the longest persisting of standar- dized stone tools. They present a continuous history of one tool type from the first to the third interglacial periods, a span.of at least 200,000 years and perhaps as many as half a million. Equally remarkable is their geographical range which covers all of Africa, western Europe and southern Asia--fully half of-the then habitable Old Vorld. Aside from differences in the local stone that was utilized, hand-axes from this whole area are constructed on the same plan and show no clear regional typology. Other tool types occur with hand-axes: utilized flakes are found at all levels, and in the later half of the sequence there-are cleavers, ovates, trimmed flakes and spherical stone balls. Throughout the sequence, however, the basic design of the hand-axe continues with its intended formnapparently unchanged. We thus have a continuous record of man's attempts to produce a single type of 'implement over mst of his tool making history. (See Figure 1.) Recent discoveries of fossil man have made it increasingly evident that biological evolution of the human body was also in progress coincident with the development of ancient stone tool types. 'While the exact time of appearance of Homo siens is still in some dispute (see Stewart, 1950 and Oakley., 1957), it is no nowseriously maintained that the earliest tool makers necessarily approximated the modern or even the neanderthal morphologies.