Oriol Monclús-Gonzalo, Shubham Pal, Thomas A. Püschel, Alessandro Urciuoli, Víctor Vinuesa, Josep M. Robles, Sergio Almécija, David M. Alba
{"title":"A Dryopithecine Talus From Abocador de Can Mata (Vallès-Penedès Basin, NE Iberian Peninsula): Morphometric Affinities and Evolutionary Implications for Hominoid Locomotion","authors":"Oriol Monclús-Gonzalo, Shubham Pal, Thomas A. Püschel, Alessandro Urciuoli, Víctor Vinuesa, Josep M. Robles, Sergio Almécija, David M. Alba","doi":"10.1002/ajpa.70043","DOIUrl":"https://doi.org/10.1002/ajpa.70043","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Objectives</h3>\u0000 \u0000 <p>The functional interpretation of postcranial remains of Middle Miocene great apes from Europe (dryopithecines) suggests a combination of quadrupedalism and orthograde behaviors without modern analogs. We provide further insights based on an isolated dryopithecine talus (IPS85037) from the Middle Miocene (11.7 Ma) Abocador de Can Mata locality ACM/C8-B* (Vallès-Penedès Basin, NE Iberian Peninsula), which represents the most complete one known to date.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Material and Methods</h3>\u0000 \u0000 <p>We compare the specimen with an extant anthropoid sample (<i>n</i> = 68) and the stem hominoid <i>Ekembo heseloni</i> (KMN RU 2036, ~18 Ma, Kenya) using 3D geometric morphometrics. For the two fossil tali, we assess their phenetic affinities using a between-group principal components analysis (bgPCA), estimate body mass based on centroid size, and make locomotor inferences using a partial least-squares regression (PLSR) between talar shape and locomotor repertoire.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>Its large inferred body mass (~38 kg) and the possession of several modern hominoid-like features (albeit combined with more plesiomorphic traits) support the attribution of IPS85037 to a male dryopithecine. The bgPCA indicates that IPS85037 falls close to the extant hominoid variation and is less cercopithecoid-like than that of <i>Ekembo</i>, whose inferred locomotor repertoire is vastly dominated by quadrupedalism (81%). In contrast, the locomotor repertoire inferred from IPS85037 combines important quadrupedal (32%) and vertical climbing/clambering (50%) components with only moderate suspension (10%).</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Discussion</h3>\u0000 \u0000 <p>Our results align with previous inferences derived from other postcranial elements of Middle Miocene dryopithecines and, given their classification as crown hominoids, support the hypothesis that certain suspensory adaptations shared by extant hylobatids and hominids likely evolved independently.</p>\u0000 </section>\u0000 </div>","PeriodicalId":29759,"journal":{"name":"American Journal of Biological Anthropology","volume":"186 4","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143801561","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Stefania Sarno, Fedora Piccini, Paolo Abondio, Elisabetta Cilli, Elena M. Kuyumdjian, Nedko A. Dimitrov, Chavdar D. Dilov, Sara De Fanti, Graziella Ciani, Davide Gentilini, Alessio Boattini, Marco Sazzini, Davide Pettener, Donata Luiselli
{"title":"The Genetic Variability of Present-Day Bulgarians Captures Ancient and Recent Ancestral Contributions","authors":"Stefania Sarno, Fedora Piccini, Paolo Abondio, Elisabetta Cilli, Elena M. Kuyumdjian, Nedko A. Dimitrov, Chavdar D. Dilov, Sara De Fanti, Graziella Ciani, Davide Gentilini, Alessio Boattini, Marco Sazzini, Davide Pettener, Donata Luiselli","doi":"10.1002/ajpa.70037","DOIUrl":"https://doi.org/10.1002/ajpa.70037","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Objectives</h3>\u0000 \u0000 <p>Thanks to its pivotal crossroad position, Bulgaria played a fundamental key role during all the migration processes that interested the continent through time. While the genetic variability of the country has been deeply investigated using uniparental markers, previous genome-wide autosomal-based surveys mainly consisted of wider-range analyzes on Europe and the whole Balkan Peninsula. Here, we specifically focused on the Bulgarian population to recapitulate the main patterns of genomic variation and the major events that shaped the present-day genetic landscape.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Methods</h3>\u0000 \u0000 <p>A total of 112 samples from seven highly representative areas of present-day Bulgaria were collected and genotyped for approximately 720 K genome-wide SNPs, and integrated with previously generated genomic data from wide modern and ancient reference panels to explore fine-scale relationship patterns and detail ancestral contributions.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>In addition to the combination of ancient ancestries related to the early Mesolithic hunter-gatherers, Neolithic farmers, and Bronze Age Steppe pastoralists, both haplotype-based analyzes on modern populations and the comparisons with ancient genomes suggest the contribution of population processes that have occurred after the Roman rule and during the Medieval period in shaping the current Bulgarian genetic pool.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Conclusions</h3>\u0000 \u0000 <p>Our results align with previous evidence highlighting the impact that some historical events may have had not only in contributing to the ethnical and socio-cultural richness of present-day populations, but also in participating in the formation of the current genomic landscape. By providing new data from modern highly-representative samples, this study integrates further research to provide a comprehensive overview of the genetic history of Bulgaria.</p>\u0000 </section>\u0000 </div>","PeriodicalId":29759,"journal":{"name":"American Journal of Biological Anthropology","volume":"186 4","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ajpa.70037","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143801457","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Keegan R. Selig, Paul E. Morse, James D. Pampush, Richard F. Kay
{"title":"Dental Wear and Molar Pulp Volume Reduction in Macaca fascicularis","authors":"Keegan R. Selig, Paul E. Morse, James D. Pampush, Richard F. Kay","doi":"10.1002/ajpa.70035","DOIUrl":"https://doi.org/10.1002/ajpa.70035","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Objectives</h3>\u0000 \u0000 <p>Odontoblasts lining the pulp cavity deposit dentine throughout life, meaning the volume of the pulp cavity decreases with age. Primates with more abrasive diets have relatively higher molar pulp volume in their unworn molars than those with less abrasive diets. We propose that species with more abrasive diets deposit additional dentine across their lifespans to help resist wear and extend the effective lifespan of their molars. Whereas both age and wear affect dentine deposition, it is unknown which of these two variables has the greater impact.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Materials and Methods</h3>\u0000 \u0000 <p>We measured pulp volume and calculated wear from micro-CT scans of lower first molars of captive-bred <i>Macaca fascicularis</i> (<i>n</i> = 13) of known age. We used reduced major axis regressions (alpha = 0.05) to test if age or wear was a better predictor of pulp volume.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>Both variables have a significant negative relationship with pulp volume (age: <i>p</i> = 0.004, <i>R</i><sup>2</sup> = 0.546; wear: <i>p</i> < 0.001, <i>R</i><sup>2</sup> = 0.890). A mixed linear model of pulp volume against wear as main effect and age as covariant had a non-significant interaction effect (<i>p</i> = 0.078) and confirmed that both age (<i>p</i> = 0.030) and wear (<i>p</i> = 0.004) are significantly negatively correlated with pulp volume.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Discussion</h3>\u0000 \u0000 <p>Results suggest that whereas pulp volume decreases with age, wear is more strongly correlated with decreasing pulp volume. These findings have implications for interpreting odontoblast activity in response to sensory feedback and the relationship between pulp volume and diet. These results also have implications for using molar pulp volume to estimate age at death in humans.</p>\u0000 </section>\u0000 </div>","PeriodicalId":29759,"journal":{"name":"American Journal of Biological Anthropology","volume":"186 3","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143707544","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Julia Muñoz-Guarinos, Rebeca García-González, José Miguel Carretero, Laura Rodríguez
{"title":"Comparing Methods for Calculating Cross-Sectional Properties From High-Resolution CT Scans in Dry Bone: The Case of the Non-Adult Femoral Midneck","authors":"Julia Muñoz-Guarinos, Rebeca García-González, José Miguel Carretero, Laura Rodríguez","doi":"10.1002/ajpa.70036","DOIUrl":"https://doi.org/10.1002/ajpa.70036","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Objective</h3>\u0000 \u0000 <p>This paper explores the various protocols for deriving endosteal and periosteal contours of the femoral midneck cross-section in non-adult individuals using EPmacroJ.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Materials and Methods</h3>\u0000 \u0000 <p>We analyzed femoral midneck cross-sectional contours in a total sample of 55 femora belonging to medieval individuals ranging in age between 2 and 20 years. Femoral midneck cross-sections were taken on high-resolution CT images and analyzed by EPJMacro in FIJI. Cross-sectional properties were obtained from periosteal and endosteal contours derived by manual, automatic, spline, and ellipse techniques. Agreement between the manual and the other techniques was evaluated using percent prediction error (%PE) and following the Bland–Altman approach.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>All the evaluated techniques used for deriving the periosteal and endosteal contours at the femoral midneck cross-section in non-adult individuals have proven to be interchangeable with manual processing, except for the spline technique for the endosteal contour. The narrowest limits of agreement were obtained for the total area, moderate limits of agreement were found for the cortical and medullary areas, and the widest limits of agreement were observed in the section moduli.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Discussion</h3>\u0000 \u0000 <p>The automatic processing of the periosteal and endosteal contours shows a high level of agreement with the manual processing of both contours. Semi-automatic approaches (spline and ellipse) provide less agreement, especially in section moduli. This suggests that inaccuracies in deriving the endosteal contour significantly affect section moduli. The best approach for extracting the geometric properties of femoral midneck cross-sections is a combination of automatic and manual methods, although automatic methods alone are also effective.</p>\u0000 </section>\u0000 </div>","PeriodicalId":29759,"journal":{"name":"American Journal of Biological Anthropology","volume":"186 3","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143689248","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
David W. Cameron, Russell L. Ciochon, Vu The Long, Nguyen Anh Tuan
{"title":"A New Look at an Old Face: The Hoà Binh Late Pleistocene Pongo Skull and Other Faciodental Fragments From Breccia Caves in Vietnam—A Morphometric Assessment With Taxonomic Implications","authors":"David W. Cameron, Russell L. Ciochon, Vu The Long, Nguyen Anh Tuan","doi":"10.1002/ajpa.70020","DOIUrl":"10.1002/ajpa.70020","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Objectives</h3>\u0000 \u0000 <p>The taxonomic status of the Middle and Late Pleistocene pongines from northern Vietnam remains obscure. Two current schemes dominate. The first has multiple species of <i>Pongo</i> and <i>Langsonia</i> occupying the region during the late Middle and Late Pleistocene. The second has just two species, with the large species <i>P. weidenreichi</i> from the Early to Late Pleistocene of China evolving into the smaller <i>P. devosi</i> from the Middle/Late Pleistocene transition. Here, we generate several multivariate analyses against the available faciodental specimens from present-day northern Vietnam to test these two schemes and assess the morphotypes of these specimens.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Materials and Methods</h3>\u0000 \u0000 <p>Discriminant factor and principal components analyses were both used against 51 extant hominids (<i>Pongo</i>, <i>Gorilla</i> and the two species of <i>Pan</i>) with 105 faciodental variables to examine the near-complete subfossil Hoà Binh skull. Additional fossils from the Late Pleistocene of this region were also analyzed. All specimens used were original.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>We conclude that there was a diverse range of <i>Pongo</i> species in the region of northern Vietnam. We recognize two large and two small species during the Late Pleistocene. One of the larger species occupied this region toward the end of the Late Pleistocene, thus refuting the chronospecies hypothesis.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Discussion</h3>\u0000 \u0000 <p>This study suggests the extinction of mainland <i>Pongo</i> species is associated with the rapid decline in habitat during the Late Pleistocene. Orangutan populations further south in Sumatra and Borneo (still then part of Mainland Asia) survived in safe havens of relic rainforests.</p>\u0000 </section>\u0000 </div>","PeriodicalId":29759,"journal":{"name":"American Journal of Biological Anthropology","volume":"186 3","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143677382","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Alexandra Niclou, Alexandra Greenwald, Cara Ocobock
{"title":"Energetic Value of Women's Work: Assessing Maternal Energetic Costs From Acorn Foraging","authors":"Alexandra Niclou, Alexandra Greenwald, Cara Ocobock","doi":"10.1002/ajpa.70023","DOIUrl":"10.1002/ajpa.70023","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Objectives</h3>\u0000 \u0000 <p>Perceptions of female energetic contributions and their role in human evolution are limited. This exploratory study compares energy expenditure, return rate, and foraging efficiency between infant carrying methods in females simulating acorn foraging practices by Indigenous communities in western North America.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Materials and Methods</h3>\u0000 \u0000 <p>After resting metabolic rate (RMR) was collected, female volunteers (<i>n</i> = 6, age: 21–37) conducted three 1-h bouts of acorn foraging. First, volunteers foraged unloaded (control) while for the second and third bouts they foraged carrying a traditional basketry cradle or a chest sling (randomized order) with 4.5 kg sandbags. Energy expenditure (EE) was measured through indirect calorimetry, physical activity intensity was assessed using accelerometry, and foraging return rates (RR) were calculated after acorn processing.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>The inter-bout results are not statistically significant. Findings show, however, that foraging RR largely surpasses EE irrespective of infant carrying method. The cradle carrying technique resulted in the largest mean EE, yet it was more efficient than the sling-carrying method. Most of the time foraging was spent at moderate physical intensity, especially during cradle-carrying bouts compared to the sling-carrying and control groups.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Conclusions</h3>\u0000 \u0000 <p>This small exploratory study demonstrates the caloric contributions by and foraging efficiency of females. Our findings emphasize that child-carrying techniques using basketry cradles allow for improved efficiency in foraging returns compared to more commonly used slings. Our results reinforce previous findings of female foraging efficiency despite the energetic demands of infant carrying and emphasize the energetic contributions of females to human evolution even during child-rearing.</p>\u0000 </section>\u0000 </div>","PeriodicalId":29759,"journal":{"name":"American Journal of Biological Anthropology","volume":"186 3","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11923397/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143664951","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Exploring Kinship Within a Late Meroitic to Medieval Cemetery in Sudan Using k-Modes Clustering\u0000 استكشاف صلة القرابة داخل مقبرة تعود الى الفترتين المروية المتأخرة والمسيحية في مود K السودان باستخدام تقنية تجميع البيانات ال","authors":"Brenda J. Baker, K. Godde, Jaime Ullinger","doi":"10.1002/ajpa.70016","DOIUrl":"10.1002/ajpa.70016","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Objectives</h3>\u0000 \u0000 <p>Intracemetery patterns at the Qinifab School site, a late Meroitic to Christian period cemetery (c. 250–1400 CE) between the fourth and fifth cataracts of the Nile River in Sudan, are modeled to explore the role of kinship in cemetery organization during significant sociopolitical and religious shifts.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Materials and Methods</h3>\u0000 \u0000 <p>Sixty-eight cranial and 36 dental nonmetric traits were examined among 67 adults. A machine-learning clustering method (<i>k</i>-modes clustering algorithm), new to biological anthropology, was used to detect patterning among biological, demographic, and temporal data and validated with inter-individual Mahalanobis distances and mixed data principal components analysis using only biological data.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>When three validated clusters were examined, a pattern emerged that aligned with the archaeological context of the cemetery when time period is considered. One cluster concentrated at the oldest end of the site appeared to be a founding group, with the other two groups equally comprising later periods. Some mortuary patterning by sex was visually identified; a few late to Post-Meroitic males grouped together in one cluster.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Discussion</h3>\u0000 \u0000 <p>Individuals from Clusters 1 and 3 were buried near each other infrequently, which suggests two different kin groups may have intermarried with the third, or one group held a status that allowed identification with the other clusters. Kinship was not a determinant for males with archery items or individuals with incisor avulsion, as they were found in all three clusters. The Qinifab School cemetery reflects temporal organization, a multilocal residence pattern, and a lack of sex stratification for the medieval period.</p>\u0000 </section>\u0000 </div>","PeriodicalId":29759,"journal":{"name":"American Journal of Biological Anthropology","volume":"186 3","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143664955","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}