Geometric morphometric analysis of the crown morphology of the lower first premolar of hominins, with special attention to Pleistocene Homo

Gómez‐Robles, Aida; Martinón‐Torres, María; Castro, José Marı́a Bermúdez de; Prado, Leyre; Sarmiento, Susana; Arsuaga, Juan Luís

doi:10.1016/j.jhevol.2008.03.011

Cited by 106 publications

(124 citation statements)

References 94 publications

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“…In general, SH hominins present dentitions that are as "Neanderthal" as those recovered from Kra pina or Hortus, and whose larger sample size allow us to consider population variability. With the exceptions mentioned above, the SH hominins show similar or more pronounced degrees and frequencies than H. heidelbergensis and even H. neanderthalensis for some of the dental traits (this study; see also Gomez-Robles et al, 2008, 2011Gomez-Robles, 2010). The highly derived state of the Sima de los Huesos dentition cannot be compared to the degree of "neanderthalization" of other penecontemporaneous populations (Ta ttersall, 2007(Ta ttersall, , 2009 Bermudez de Castro et al, 2009;Stringer, 2009;Dennell et al, 2010) Wagner et al, 2010).…”

supporting

confidence: 48%

“…This shape is typical of the Neanderthal lineage but more pronounced in the SH sample than in other Middle Pleistocene groups such as Arago or even some classic Neanderthals such as some from Krapina and Le Moustier (Gomez-Robles et al, 2008;Gomez-Robles, 2010). The P 4 S present an asymmetrical contour, a mesially displaced metaconid, and accessory lingual cusps in association with a continuous transverse ridge.…”

Section: Discussionmentioning

confidence: 80%

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Morphological description and comparison of the dental remains from Atapuerca-Sima de los Huesos site (Spain)

Martinón‐Torres

Castro

Gómez‐Robles

et al. 2012

Journal of Human Evolution

216

258

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supporting

confidence: 48%

Section: Discussionmentioning

confidence: 80%

Morphological description and comparison of the dental remains from Atapuerca-Sima de los Huesos site (Spain)

Martinón‐Torres

Castro

Gómez‐Robles

et al. 2012

Journal of Human Evolution

216

258

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“…One way of measuring the subtle differences in shape between objects is using GMA and this approach is being applied increasingly to clarify genetic contribution to various morphological features [48][49][50][51][52][53][54].…”

Section: New Methods Of Shape Analysismentioning

confidence: 99%

Genetic, environmental and epigenetic influences on variation in human tooth number, size and shape

et al. 2011

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The aim of this review is to highlight some key recent developments in studies of tooth number, size and shape that are providing better insights into the roles of genetic, environmental and epigenetic factors in the process of dental development. Advances in molecular genetics are helping to clarify how epigenetic factors influence the spatial and temporal regulation of the complex processes involved in odontogenesis. At the phenotypic level, the development of sophisticated systems for image analysis is enabling new dental phenotypes to be defined. The 2D and 3D data that are generated by these imaging systems can then be analysed with mathematical approaches, such as geometric morphometric analysis. By gathering phenotypic data and DNA from twins, it is now possible to use 'genome-wide' association studies and the monozygotic co-twin design to identify important genes in odontogenesis and also to clarify how epigenetic and environmental factors can affect this process. Given that many of the common dental anomalies affecting the human dentition are interrelated, apparently reflecting pleiotropic genetic effects, the discoveries and new directions described in this paper should have important implications for clinical dental practice in the future.

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“…However, these methods are less practical for quantifying tooth shape, as they require micro-CT data that are costly and time-consuming to collect, limiting the sampling potential. Two-dimensional morphometrics has been successfully used to examine occlusal morphology in hominins (G omez-Robles, 2008;Gomez-Robles et al, 2007), rodents (Macholan, 2006;Renaud, 1999), and primates (White, 2009), and has been found to provide more shape information than simple linear measures (Bernal, 2007). Twodimensional photographs of the lingual aspect of the tooth were deemed most appropriate for our analysis for several reasons: (1) the majority of shape variation in the taxa sampled occurs in this plane (roughly parasagittal); (2) the lateral aspect of the tooth is relatively flat, thus allowing repeatable positioning of the tooth for imaging; and (3) several homologous landmarks were identifiable on the lingual surfaces of these teeth.…”

mentioning

confidence: 99%

Body size and premolar evolution in the early‐middle eocene euprimates of Wyoming

Jones

Rose

Perry

2013

American J Phys Anthropol

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The earliest euprimates to arrive in North America were larger-bodied notharctids and smaller-bodied omomyids. Through the Eocene, notharctids generally continued to increase in body size, whereas omomyids generally radiated within small- and increasingly mid-sized niches in the middle Eocene. This study examines the influence of changing body size and diet on the evolution of the lower fourth premolar in Eocene euprimates. The P4 displays considerable morphological variability in these taxa. Despite the fact that most studies of primate dental morphology have focused on the molars, P4 can also provide important paleoecological insights. We analyzed the P4 from 177 euprimate specimens, representing 35 species (11 notharctids and 24 omomyids), in three time bins of approximately equal duration: early Wasatchian, late Wasatchian, and Bridgerian. Two-dimensional surface landmarks were collected from lingual photographs, capturing important variation in cusp position and tooth shape. Disparity metrics were calculated and compared for the three time bins. In the early Eocene, notharctids have a more molarized P4 than omomyids. During the Bridgerian, expanding body size range of omomyids was accompanied by a significant increase in P4 disparity and convergent evolution of the semimolariform condition in the largest omomyines. P4 morphology relates to diet in early euprimates, although patterns vary between families.

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Geometric morphometric analysis of the crown morphology of the lower first premolar of hominins, with special attention to Pleistocene Homo

Cited by 106 publications

References 94 publications

Morphological description and comparison of the dental remains from Atapuerca-Sima de los Huesos site (Spain)

Morphological description and comparison of the dental remains from Atapuerca-Sima de los Huesos site (Spain)

Genetic, environmental and epigenetic influences on variation in human tooth number, size and shape

Body size and premolar evolution in the early‐middle eocene euprimates of Wyoming

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