Trigonid crests expression in Atapuerca-Sima de los Huesos lower molars: Internal and external morphological expression and evolutionary inferences

Pinillos, Marina Martínez de; Martinón‐Torres, María; Skinner, Matthew M.; Arsuaga, Juan Luís; Gracia-Téllez, Ana; Martı́nez, Ignacio; Martín‐Francés, Laura; Castro, José Marı́a Bermúdez de

doi:10.1016/j.crpv.2013.10.008

Cited by 63 publications

(79 citation statements)

References 38 publications

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“…Turner, 1987;Matsumura and Oxenham, 2014). However, a suite of M 3 characteristics has been identified as taxonomically and phylogenetically informative, with varying reliability among different taxa (Olejniczak et al, 2008;Bailey et al, 2011;Martinón-Torres et al, 2012;Smith et al, 2012;Martínez de Pinillos et al, 2014;Gómez-Robles et al, 2015). Additionally, principal component, canonical variance, and corresponding discriminant function analyses accurately separate M 2 and M 3 s in this study.…”

Section: Discussionmentioning

confidence: 77%

Section: Morphologymentioning

confidence: 76%

“…Previous studies have detected this discrepancy (Bailey et al, 2011;Martínez de Pinillos et al, 2014). Martínez de Pinillos et al (2014) noticed that the way in which MTC is expressed on the dentine surface is more complicated than on the enamel surface. Bailey et al (2011) pointed out that the degree to which MTC expression corresponds between the enamel and dentine surfaces was lower in H. sapiens than in Neanderthals, and the authors proposed that the thicker enamel found in H. sapiens might be the cause.…”

Section: Morphologymentioning

confidence: 76%

“…The essential ridges of both protoconid and metaconid are well developed, but their connections are completely disrupted (no continuous MTC) (Grade 1 according to Bailey et al (2011); Type 4 according to Martínez de Pinillos et al (2014)). The dentine horn of the metaconid is accompanied by a shelf-like structure on its distolingual side, corresponding to the large pit on the enamel surface ( Figure 5).…”

Section: Descriptionsmentioning

confidence: 99%

“…A linear-like anterior fovea is present and well developed (ASUDAS grade 2). Distal to the anterior fovea is a middle trigonid crest (MTC) that is slightly notched by the mesial groove (Type 3 or 5 according to Korenhof (1982); Type A according to Martínez de Pinillos et al (2014); grade 1 according to Martinón-Torres et al (2012)). There is no distal trigonid crest (DTC) or deflecting wrinkle.…”

Section: Descriptionsmentioning

confidence: 99%

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Section: Discussionmentioning

confidence: 77%

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Martinón‐Torres¹,

Castro²

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Molar crown inner structural organization in Javanese Homo erectus

Zanolli

2014

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This contribution investigates the inner organizational pattern (tooth tissue proportions and enamel-dentine junction morphology) of seven Homo erectus permanent molar crowns from the late Lower-early Middle Pleistocene Kabuh Formation of the Sangiran Dome (Central Java, Indonesia). The previous study of their external characteristics confirmed the degree of time-related structural reduction occurred in Javanese H. erectus, and also revealed a combination of nonmetric features which are rare in the Lower and early Middle Pleistocene dental record, but more frequently found in recent humans. In accordance with their outer occlusal morphology, the specimens exhibit a set of derived internal features, such as thick to hyperthick enamel, an incomplete expression of the crest patterns at the enamel-dentine junction (EDJ) level, a sharp EDJ topography. As a whole, these features differ from those expressed in some penecontemporaneous specimens/samples representing African H. erectus/ergaster and H. heidelbergensis, as well as in Neanderthals, but occur in recent human populations. Further research in virtual dental paleoanthropology to be developed at macroregional scale would clarify the polarity and intensity of the intermittent exchanges between continental and insular Southeast Asia around the Lower to Middle Pleistocene boundary, as well as should shed light on the still poorly understood longitudinal evolutionary dynamics across continental Asia.

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Trigonid crests expression in Atapuerca-Sima de los Huesos lower molars: Internal and external morphological expression and evolutionary inferences

Cited by 63 publications

References 38 publications

Late Pleistocene hominin teeth from Laoya Cave, southern China

Late Pleistocene hominin teeth from Laoya Cave, southern China

The Hominins 2

Molar crown inner structural organization in Javanese Homo erectus

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