Search Results - "KAY, RICHARD F."

Locomotor head movements and semicircular canal morphology in primates by Malinzak, Michael D, Kay, Richard F, Hullar, Timothy E

“…Animal locomotion causes head rotations, which are detected by the semicircular canals of the inner ear. Morphologic features of the canals influence…”
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First record of the Miocene hominoid Sivapithecus from Kutch, Gujarat state, western India by Bhandari, Ansuya, Kay, Richard F, Williams, Blythe A, Tiwari, Brahma Nand, Bajpai, Sunil, Hieronymus, Tobin

“…Hominoid remains from Miocene deposits in India and Pakistan have played a pivotal role in understanding the evolution of great apes and humans since they were…”
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Dietary inference from upper and lower molar morphology in platyrrhine primates by Allen, Kari L, Cooke, Siobhán B, Gonzales, Lauren A, Kay, Richard F

“…The correlation between diet and dental topography is of importance to paleontologists seeking to diagnose ecological adaptations in extinct taxa. Although the…”
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Intraspecific variation in semicircular canal morphology—A missing element in adaptive scenarios? by Gonzales, Lauren A., Malinzak, Michael D., Kay, Richard F.

“…Objectives Recent evidence suggests that the amount of intraspecific variation in semicircular canal morphology may, itself, be evidence for varying levels of…”
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Evidence for an Asian origin of stem anthropoids by Kay, Richard F.

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Dietary quality and encephalization in platyrrhine primates by Allen, Kari L, Kay, Richard F

“…The high energetic costs of building and maintaining large brains are thought to constrain encephalization. The ‘expensive-tissue hypothesis’ (ETH) proposes…”
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New perspectives on anthropoid origins by Williams, Blythe A, Kay, Richard F, Kirk, E. Christopher

“…Adaptive shifts associated with human origins are brought to light as we examine the human fossil record and study our own genome and that of our closest ape…”
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Correction: First record of the Miocene hominoid Sivapithecus from Kutch, Gujarat state, western India by Bhandari, Ansuya, Kay, Richard F, Williams, Blythe A, Tiwari, Brahma Nand, Bajpai, Sunil, Hieronymus, Tobin

“…[This corrects the article DOI: 10.1371/journal.pone.0206314.]…”
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Biogeography in deep time – What do phylogenetics, geology, and paleoclimate tell us about early platyrrhine evolution? by Kay, Richard F.

“…[Display omitted] •A phylogenetic and biogeographic scenario is presented of 26Ma-Recent Platyrrhini.•NW monkeys appear in the tropics at 26Ma; crown…”
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oldest Asian record of Anthropoidea by Bajpai, Sunil, Kay, Richard F, Williams, Blythe A, Das, Debasis P, Kapur, Vivesh V, Tiwari, B.N

“…Undisputed anthropoids appear in the fossil record of Africa and Asia by the middle Eocene, about 45 Ma. Here, we report the discovery of an early Eocene…”
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Technical note: Dental microwear textures of "Phase I" and "Phase II" facets by Krueger, Kristin L., Scott, Jessica R., Kay, Richard F., Ungar, Peter S.

“…The power stroke of mastication has been traditionally divided into two parts, one which precedes centric occlusion, and the other which follows it—“Phase I”…”
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New World monkey origins by Kay, Richard F

“…Fossils in Peru raise questions about the early evolution of monkeys in South America New World monkeys (Platyrrhini) appeared suddenly in South America in the…”
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Testing a developmental model in the fossil record: molar proportions in South American ungulates by Wilson, Laura A. B, Sánchez-Villagra, Marcelo R, Madden, Richard H, Kay, Richard F

“…A developmental model, based upon murine rodents, has been proposed by Kavanagh et al. (2007) to explain lower molar proportions in mammals. We produce a…”
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Leonard B. Radinsky (1937–1985), Radical Biologist by Kay, Richard F.

“…Trained in vertebrate paleontology, Leonard Radinsky (1937–1985) made signal contributions to the study of form and function in paleobiology. Here, I review…”
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100 years of primate paleontology by Kay, Richard F.

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Darwinius masillae is a strepsirrhine—a reply to Franzen et al. (2009) by Williams, Blythe A., Kay, Richard F., Christopher Kirk, E., Ross, Callum F.

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Dental topography of the Oligocene anthropoids Aegyptopithecus zeuxis and Apidium phiomense: Paleodietary insights from analysis of wear series by Morse, Paul E., Pampush, James D., Kay, Richard F.

“…Fossil primate dietary inference is enhanced when ascertained through multiple, distinct proxies. Dental topography can be used to assess changes in occlusal…”
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Unique nasal turbinal morphology reveals Homunculus patagonicus functionally converged on modern platyrrhine olfactory sensitivity by Lundeen, Ingrid K., Kay, Richard F.

“…The phyletic position of early Miocene platyrrhine Homunculus patagonicus is currently a matter of debate. Some regard it to be an early member of the…”
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Preliminary notes on a newly discovered skull of the extinct monkey Antillothrix from Hispaniola and the origin of the Greater Antillean monkeys by Kay, Richard F., Hunt, Kevin D., Beeker, Charles D., Conrad, Geoffrey W., Johnson, Claudia C., Keller, Jessica

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Dental topographic change with macrowear and dietary inference in Homunculus patagonicus by Li, Peishu, Morse, Paul E., Kay, Richard F.

“…Homunculus patagonicus is a stem platyrrhine from the late Early Miocene, high-latitude Santa Cruz Formation, Argentina. Its distribution lies farther south…”
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