RT Journal Article
T1 Dental tissue proportions and linear dimensions of Sima de los Huesos lower incisors
A1 Lockey, Annabelle L.
A1 Martín-Francés, Laura
A1 Arsuaga Ferreras, Juan Luis
A1 Bermúdez de Castro, José María
A1 Martinón Torres, María
AB ObjectivesTo assess the phenotypic affinities of the Sima de los Huesos (SH) mandibular incisors dental tissue proportions, and radicular dimensions, relative to Neandertals, recent modern humans (RMH), and a large comparative sample of Pleistocene hominins.Materials and MethodsTwo dimensional (2D) and three dimensional (3D) data were extracted from SH (n = 22) incisors, and compared with specimens from Krapina (n = 6) and Ehringsdorf (n = 2), RMH (n = 42), as well as a comparative sample of hominins from the literature (n = 244). We calculated average enamel thickness (AET), relative enamel thickness (RET) and radicular variables (cervical area [CA] and root surface area [RSA], root linear dimensions [RL], dentine and pulp volume [RDV, RPV, TRV]).ResultsWe found that SH incisor crown variables were generally undiagnostic for 2D and 3D AET and 2D RET. Trends indicated thicker 3D RET in RMH relative to SH hominins, Tighenif hominins, and Neandertals. The SH and Neandertal mandibular incisors share similar RL, RSA, and root tissue volumes when compared to other extinct members of Homo. Relative to all other extinct hominins examined here, SH incisors display a relatively narrow cervical labio-lingual diameter. Finally, we found a weak correlations in SH and RMH between the crown and root variables.DiscussionThis study confirms that SH mandibular incisors' dental tissue proportions and root dimensions align more closely to Neandertals. However, the complete set of Neandertal apomorphies is not present within SH mandibular incisors. SH incisors concur with traits reported in SH canines, and contrasting patterns in the molars, revealing a dichotomy between the anterior and posterior teeth for dental tissue proportions.
PB Wiley
SN 2692-7691
YR 2023
FD 2023-03
LK https://hdl.handle.net/20.500.14352/73348
UL https://hdl.handle.net/20.500.14352/73348
LA eng
NO Ministerio de Ciencia e Innovación
NO The Leakey Foundation
DS Docta Complutense
RD 14 dic 2025