Reconstruction of the cranial musculature and masticatory function of the Pleistocene panamerican ground sloth Eremotheriumlaurillardi (Mammalia, Xenarthra, Megatheriidae)

References

• Alexander , RM . 1968 . Animal mechanics , London : Sidgwick & Jackson . 346p
   Google Scholar
• Ameghino , F . 1889 . Contribucion al conociomento de les Mammiferos fosiles de la Republico Argentina . Acta Acad Nac de Cien, Cordoba , 6 : 661 – 757 .
   Google Scholar
• Anthony , HE . 1916 . Preliminary report of fossil mammals from Porto Rico . Ann NY Acad Sci , 27 : 193 – 203 .
   Google Scholar
• Anthony , HE . 1918 . The indigenous land mammals of Porto Rico, living and extinct . Mem Am Mus Nat Hist , 2 ( 2 ) : 331 – 435 .
   Google Scholar
• Bargo , MS . 2001 . The ground sloth Megatherium americanum: skull shape, bite forces, and diet . Acta Palaeo Pol , 46 ( 2 ) : 173 – 192 .
   Web of Science ®Google Scholar
• Beebe , W . 1926 . The three-toed sloth. Bradypus cuculliger cuculliger Wagler . Zoologica , 7 : 1 – 67 .
   Google Scholar
• Carlsöö , S . 1942 . Nervous coordination and mechanical function of the mandibular elevators . Acta Odontol Scand , 10 : 6 – 35 .
   Google Scholar
• Carroll , RL . 1988 . Vertebrate Paleontology and evolution , New York : W.H. Freeman and Co . 638p
   Google Scholar
• Cartelle , C . 1991 . Um novo Mylodontinae (Edentata, Xenarthra) do Pleistoceno final da regiao intertropical brasileria . An da Acad Brasil de Cien , 63 : 161 – 170 .
   Google Scholar
• Cartelle , C and De Iuliis , G . 1995 . Eremotherium laurillardi: the Panamerican late Pleistocene megatheriid sloth . J Vert Paleo , 15 : 830 – 841 .
   Web of Science ®Google Scholar
• Cartelle , C and De Iuliis , G . 2006 . Eremotherium laurillardi (Lund) (Xenarthra, Megatheriidae), the Panamerican giant ground sloth: taxonomic aspects of the ontogeny of skull and dentition . J Syst Paleontol , 4 : 199 – 209 .
   Web of Science ®Google Scholar
• Costa , RL and Greaves , WS . 1981 . Experimentally produced tooth wear facets and the direction of jaw motion . J Paleont , 55 ( 3 ) : 635 – 638 .
   Web of Science ®Google Scholar
• Currey , JD . 1984 . Mechanical adaptations of bones , Princeton, NJ : Princeton University Press . 304p
   Google Scholar
• De Iuliis , G . 1994 . Relationships of the Megatheriinae, Nothrotheriinae, and Planopsidae: some skeletal characteristics and their importance for phylogeny . J Vert Paleont , 14 ( 4 ) : 577 – 591 .
   Web of Science ®Google Scholar
• De Iuliis , G and Cartelle , C . 1999 . A new giant megatheriine ground sloth (Mammalia: Xenarthra: Megatheriidae) fiom the late Blancan to early Irvingtonian of Florida . Zool J Lin Soc , 127 : 495 – 515 .
   Web of Science ®Google Scholar
• De Iuliis , G and Saint-André , P-A . 1997 . Eremotherium sefvei nov. sp. (Mammalia, Xenarthra, Megatheriidae) from the Pleistocene of Ulloma . Boliva. Geobios , 30 : 453 – 461 .
   Web of Science ®Google Scholar
• De Muizon , C and McDonald , HG . 1995 . An aquatic sloth from the Pliocene of Peru . Nature , 375 : 224 – 227 .
   Web of Science ®Google Scholar
• Edgeworth , FH . 1935 . The cranial muscles of vertebrates , Cambridge : Cambridge University Press .
   Google Scholar
• Engelmann , GF . 1985 . “ The phylogeny of the Xenarthra ” . In The evolution and ecology of Armadillos, sloths and Vermilinguas , 51 – 64 . Washington, DC : Smithsonian Institution Press .
   Google Scholar
• Engelmann , GF . 1987 . A new Deseadan sloth (Mammalia: Xenarthra) from Salla, Boliva, and its implications for the primitive dentition in edentates . J Vert Paleont , 7 : 217 – 223 .
   Google Scholar
• Farina , RA . 1996 . Trophic relationships among Lujanian mammals . Evo Theory , 11 ( 2 ) : 125 – 134 .
   Google Scholar
• Farina , RA , Vizcaino , SF and Bargo , MS . 1998 . Body mass estimations in Lujanian (late Pleistocene-early Holocene of South America) mammal megafauna . Mastozool Neotrop , 5 : 87 – 108 .
   Google Scholar
• Gaudin , TJ . 1995 . The ear region of Edentates and the phylogeny of the Tardigrada (Mammalia, Xenarthra) . J Vert Paleont , 15 ( 3 ) : 672 – 705 .
   Web of Science ®Google Scholar
• Gaudin , TJ . 2004 . Phylogenetic relationships among sloths (Mammalia, Xenarthra, Tardigrada): the craniodental evidence . Zool J Lin Soc , 140 ( 2 ) : 255 – 305 .
   Web of Science ®Google Scholar
• Greaves , WS . 1973 . The inference of jaw motion from tooth wear facets . J Paleont , 47 ( 5 ) : 1000 – 1001 .
   Web of Science ®Google Scholar
• Greaves , WS . 1978 . The jaw lever system in ungulates: a new model . J Zool London , 184 : 271 – 285 .
   Web of Science ®Google Scholar
• Greaves , WS . 1980 . The mammalian jaw mechanism – the high glenoid cavity . The Amer Nat , 116 ( 3 ) : 432 – 440 .
   Web of Science ®Google Scholar
• Greaves , WS . 1983 . A functional analysis of carnassial biting . Biol J Lin Soc , 20 ( 4 ) : 353 – 363 .
   Web of Science ®Google Scholar
• Gysi , A . 1921 . Studies on the leverage problem of the mandible . Dent Dis , 27 : 74 – 84 . 144–150; 203–208
   Google Scholar
• Hansen , RM . 1978 . Shasta ground sloth food habits, Rampart Cave, Arizona . Paleobiology , 4 ( 3 ) : 302 – 319 .
   Web of Science ®Google Scholar
• Herring , SW . 1972 . Sutures – a tool in functional cranial analysis . Acta Anat , 83 : 222 – 247 .
   PubMedGoogle Scholar
• Herring , SW . 1974 . A biometric study of suture fusion and skull growth in peccaries . Anat Embryol , 146 : 167 – 180 .
   PubMedGoogle Scholar
• Herring , SW . 1975 . Adaptations for gape in hippopotamus and its relatives . Forma et Funct , 7 : 363 – 376 .
   Google Scholar
• Herring , SW and Mucci , RJ . 1991 . In vive strain in cranial sutures: the zygomatic arch . J Morph , 207 : 225 – 239 .
   PubMed Web of Science ®Google Scholar
• Janis , C . 1976 . The evolutionary strategy of the Equiidae and the origins of rumen and cecal digestion . Evolution , 30 : 757 – 774 .
   PubMed Web of Science ®Google Scholar
• Lund , W . 1842 . Blik paa Brasiliens Dyreverden f”r Sidste Jordomvaeltning. Tredie Afhandling: Forsaettelse af Pattedyrene . Det Kongelige Danske Videnskabernes Selskbas Naturvidenskabelige og Mathematiske Afhandlinger , 9 : 137 – 208 .
   Google Scholar
• Maglio , VJ . 1973 . Evolution of mastication in the Elephantidae . Evolution , 26 ( 4 ) : 638 – 658 .
   Web of Science ®Google Scholar
• Matthew , WD and Paula Couto , C . 1959 . The Cuban Edentates . Bull Am Mus Nat Hist , 117 : 1 – 56 .
   Google Scholar
• McDonald HG. 1977. Description of the osteology of the extinct gravigrade edentate Megalonyx with observations on its ontogeny, phylogeny and functional anatomy [masters]. [Gainesville (FL)]: University of Florida.
   Google Scholar
• McAfee RK. 2007. Reassessing the taxonomy and affinities of the Mylodontinae sloths, Glossotherium and Paramylodon (Mammalia: Xenarthra: Tardigrada) [dissertation]. [DeKalb (IL)]: Northern Illinois University.
   Google Scholar
• Naples , VL . 1982 . Cranial osteology and function in the tree sloths, Bradypus and Choloepus . Am Mus Novitates , 2739 : 1 – 41 .
   Google Scholar
• Naples , VL . 1985a . Form and function of the masticatory musculature in the tree sloths, Bradypus and Choloepus . J Morph , 183 : 25 – 50 .
   PubMed Web of Science ®Google Scholar
• Naples , VL . 1985b . “ The superficial facial musculature in the sloths and anteaters ” . In The evolution, and ecology of the Armadillos, sloths and Vermilinguas , 173 – 189 . Washington, DC : Smithsonian Institution Press .
   Google Scholar
• Naples , VL . 1986 . The morphology and function of the hyoid region in the tree sloths, Bradypus and Choloepus . J Mammal , 67 ( 4 ) : 712 – 724 .
   Web of Science ®Google Scholar
• Naples , VL . 1987 . Reconstruction of cranial morphology and analysis of function in the Pleistocene ground sloth Nothrotheriops shastense (Mammalia, Megatheriidae) . Contrib Sci , 389 : 1 – 21 .
   Google Scholar
• Naples , VL . 1989 . The feeding mechanism in the ground sloth, Glossotherium . Contrib Sci , 415 : 1 – 23 .
   Google Scholar
• Naples , VL . 1990 . Morphological changes in the facial region and a model of dental growth and wear pattern development in Nothrotheriops shastensis . J Vert Paleont , 10 ( 3 ) : 372 – 389 .
   Google Scholar
• Naples , VL . 1995 . “ The artificial generation of wear patterns on tooth models as a means to infer mandibular movement during feeding in mammals ” . In Functional morphology in vertebrate Paleontology , 137 – 150 . Cambridge : Cambridge University Press .
   Google Scholar
• Parker , WK . 1885 . I. On the structure and development of the skull in the Mammalia. Part II. Edentata . London: Phil Trans Roy Soc , 34 : 1 – 119 .
   Google Scholar
• Patterson , B and Pascual , R . 1972 . “ The fossil mammal fauna of South America ” . In Evolution, mammals and southern continents , 274 – 309 . New York : State University of New York Press .
   Google Scholar
• Rensberger , JM . 1973 . An occlusion model for mastication and dental wear in herbivorous mammals . J Paleontol , 47 : 515 – 528 .
   Web of Science ®Google Scholar
• Romer , AS . 1966 . Vertebrate Paleontology , 3rd ed , Chicago, IL : University of Chicago Press . 468p
   Google Scholar
• Scapino , RP . 1965 . The third joint of the canine jaw . J Morph , 116 ( 1 ) : 23 – 50 .
   PubMed Web of Science ®Google Scholar
• Schulman , G . 1906 . Uber die ventrale Facialmuskulatur einiger Saugetiere, besonders der Monotremen. Fest . fur Palmen, Nr 18, Hlsingfors: , : 4 – 67 .
   Google Scholar
• Scillato-Yane , GJ . 1977 . Octomylodontidae: Nueva subfamilia de Mylodontidae (Edentata, Tardigrada). Descripcion del craneo y mandibula de Octomylodon robertoscagliai n. sp., procedentes de la Formacion Arroyo Chasico (edad Chasiquesne, Plioceno temprano) del sur de la provincia de Buenos Aires (Argentina). Algunas consideraciones filogeneticas y sistematicas sobre los Mylodontoides . Publ del Mus Mun de Cien Nat de Mar del Plata ‘Lorenzo Scaglia’ , 2 ( 5 ) : 123 – 140 .
   Google Scholar
• Sicher , H . 1944 . Masticatory apparatus of the sloths . Fieldiana Zool , 29 ( 10 ) : 161 – 168 .
   Google Scholar
• Simpson , GG . 1945 . The principles of classification and a classification of the mammals . Bull Am Mus Nat Hist , 85 : 1 – 350 .
   Web of Science ®Google Scholar
• Stock , C . 1925 . Cenozoic Gravigrade Edentates of Western North America, with special reference to the Pleistocene Megalonychinae and Mylodontidae of Rancho La Brea , Washington, DC : Carnegie Institute of Washington . 125p
   Google Scholar
• Teng , S and Herring , SW . 1995 . A stereological study of trabecular architecture in the mandibular condyle of the pig . Arch Oral Biol , 40 : 299 – 310 .
   PubMed Web of Science ®Google Scholar
• Turnbull , WD . 1970 . Mammalian masticatory apparatus . Fieldiana Geol , 18 ( 2 ) : 147 – 356 .
   Google Scholar
• von Toldt , C . 1906 . Der Winkleforsatz des Unterkiefers bein Menschen und bei den Saugetieren und die Beziehungen der Kaumuskeln zu demselben II . Teil Sitz Kaiserl Akad Wiss Wien Mathem-naturw Klasse, Bc , CXIV ( 3 ) : 315 – 476 .
   Google Scholar
• von Toldt , C . 1907 . Der vordere Bauch des M. Digastricus mandibulae und seine variationen bein Menchen . Sitz Akad Wiss Wien , 116 : 1 – 373 .
   Google Scholar
• von Toldt , C . 1908 . Der vordere Bauch des M. Digastricus mandibulae und seine variationen bein Menchen. II . Sitz Akad Wiss Wien , 117 : 229 – 231 .
   Google Scholar
• Wainwright , SA , Biggs , WD , Currey , JD and Gosline , JM . 1975 . Mechanical design in organisms , Princeton, NJ : Princeton University Press . 423p
   Google Scholar
• Webb , SD . 1985 . “ The interrelationships of tree sloths and ground sloths ” . In The evolution, and ecology of the Armadillos, sloths and Vermilinguas , 22 – 50 . Washington, DC : Smithsonian Institution Press .
   Google Scholar
• Wetzel , RM . 1985 . “ The identification and distribution of recent Xenarthra ( = Edentata) ” . In The evolution, and ecology of the Armadillos, sloths and Vermilinguas , 5 – 21 . Washington, DC : Smithsonian Institution Press .
   Google Scholar
• Windle , BCA and Parsons , FG . 1899 . On the myology of the Edentata . Proc Zool Soc London , I : 314 – 339 . II:990–1017
   Google Scholar
• Winge , H . 1941 . The interrelationships of the Mammalian genera . Reitzel Forlag CA, Kobenhavn , I : 319 – 411 .
   Google Scholar