Biological and Physical Anthropology Commons^™

Prevalence Of Drifting Osteons Distinguishes Human Bone, Katherine M. French, Sophia R. Mavroudas, Victoria M. Dominguez

Publications and Research

The histological, or microscopic, appearance of bone tissue has long been studied to identify species-specific traits. There are several known histological characteristics to discriminate animal bone from human, but currently no histological characteristic that has been consistently identified in human bone exclusive to other mammals. The drifting osteon is a rare morphotype found in human long bones and observationally is typically absent from common mammalian domesticates. We surveyed previously prepared undecalcified histological sections from 25 species (human n = 221; nonhuman primate n = 24; nonprimate n = 169) to see if 1) drifting osteons were indeed more common in …

A Review Of Theropithecus Oswaldi With The Proposal Of A New Subspecies, Dagmawit Abebe Getahun, Eric Delson, Chalachew Mesfin Seyoum

Publications and Research

Theropithecus oswaldi darti, as currently understood, is the oldest Theropithecus taxon in the fossil record and the earliest subspecies in the Theropithecus oswaldi lineage. Theropithecus oswaldi darti is typified at the site of Makapansgat in South Africa, and a similar form (T. o. cf. darti) is usually recognized at Hadar, Dikika, some Middle Awash localities, and Woranso-Mille in Ethiopia. This taxon is also tentatively believed to occur in Kenya at Kanam and Koobi Fora and in Member C of the Shungura Formation in Ethiopia. While there is a general consensus that the East African ‘darti’ specimens are …

Large-Herbivore Nemabiomes: Patterns Of Parasite Diversity And Sharing, Georgia C. Titcomb, Johan Pansu, Matthew C. Hutchinson, Kaia J. Tombak, Christina B. Hansen, Christopher C. M. Baker, Tyler R. Kartzinel, Robert M. Pringle

Publications and Research

Amidst global shifts in the distribution and abundance of wildlife and livestock, we have only a rudimentary understanding of ungulate parasite communities and parasite-sharing patterns. We used qPCR and DNA metabarcoding of fecal samples to characterize gastrointestinal nematode (Strongylida) community composition and sharing among 17 sympatric species of wild and domestic large mammalian herbivore in central Kenya. We tested a suite of hypothesis-driven predictions about the role of host traits and phylogenetic relatedness in describing parasite infections. Host species identity explained 27 – 53% of individual variation in parasite prevalence, richness, community composition and phylogenetic diversity. Host and parasite phylogenies …

The Naming Of Homo Bodoensis By Roksandic And Colleagues Does Not Resolve Issues Surrounding Middle Pleistocene Human Evolution, Eric Delson, Chris Stringer

Publications and Research

Roksandic et al. (2022) proposed the new species name Homo bodoensis as a replacement name for Homo rhodesiensis Woodward, 1921, because they felt it was poorly and variably defined and was linked to sociopolitical baggage. However, the International Code of Zoological Nomenclature includes regulations on how and when such name changes are allowed, and Roksandic et al.'s arguments meet none of these requirements. It is not permitted to change a name solely because of variable (or erroneous) later use once it has been originally defined correctly, nor can a name be modified because it is offensive to one or more …

Pore Extractor 2d: An Imagej Toolkit For Quantifying Cortical Pore Morphometry On Histological Bone Images, With Application To Intraskeletal And Regional Patterning, Mary E. Cole, Sam D. Stout, Victoria M. Dominguez, Amanda M. Agnew

Publications and Research

Objectives: Cortical porosity is used as a proxy of bone quality, fragility, and remo- deling activity in anthropological contexts. Histological quantification is limited by time-intensive manual annotation. Pore Extractor 2D is an ImageJ toolkit developed for computer-assisted pore identification and automated pore morphometry. Materials and Methods: Toolkit components include: (1) Utilities for cortical border clearing, (2) Image Pre-Processing: Image contrast enhancement and noise reduction, (3) Pore Extractor: User-directed options for segmenting, closing, and smoothing pore spaces, (4) Pore Modifier: Utilities to expedite manual correction of extracted pore spaces, and (5) Pore Analyzer: Morphometric analyses by pore type and anatomical region. …

Case 3847 – Simopithecus Oswaldi Andrews, 1916 (Currently Theropithecus Oswaldi; Mammalia, Primates, Cercopithecidae), Proposed Conservation By Reversal Of Precedence With Cynocephalus Atlanticus Thomas, 1884., Eric Delson, David M. Alba, Stephen R. Frost, Dagmawit Abebe Getahun, Christopher C. Gilbert

Publications and Research

The purpose of this application, under Articles 23.9.3 and 81.1 of the Code, is to conserve the usage of the species-group name Simopithecus oswaldi Andrews, 1916 by giving it precedence over its senior subjective synonym Cynocephalus atlanticus Thomas, 1884. Theropithecus is a common to dominant member of the extinct primate community across Africa after 4 million years ago (Jablonski & Frost, 2010) and often co-occurred with extinct humans (Hominini); fossils are also known rarely across Eurasia (Roberts et al., 2014). Most fossil samples are currently included in Theropithecus oswaldi (Andrews, 1916), which is often divided into chrono-geographic subspecies. Cynocephalus atlanticus …

African Land Mammal Ages, John Van Couvering, Eric Delson

Publications and Research

We define 17 African land mammal ages, or AFLMAs, covering the Cenozoic record of the Afro-arabian continent, the planet’s second largest land mass. While fossiliferous deposits are absent on the eroded plateau of the continent’s interior, almost 800 fossil genera from over 350 locations have now been identified in coastal deposits, karst caves, and in the Neogene rift valleys. Given a well-developed geochronologic framework, together with continuing revision to the fossil record—both stimulated by the story of human evolution in Africa—and also to compensate for the variation in fossil ecosystems across such great distances, the AFLMAs are biochronological units defined …

Market Integration And Soil-Transmitted Helminth Infection Among The Shuar Of Amazonian Ecuador, Theresa E. Gildner, Tara J. Cepon-Robins, Melissa A. Liebert, Samuel S. Urlacher, Joshua M. Schrock, Christopher J. Harrington, Felicia C. Madimenos, J. Josh Snodgrass, Lawrence S. Sugiyama

Publications and Research

Background

Soil-transmitted helminth (STH) infections have many negative health outcomes (e.g., diarrhea, nutritional deficiencies) that can also exacerbate poverty. These infections are generally highest among low-income populations, many of which are also undergoing market integration (MI; increased participation in a market-based economy). Yet the direct impact of MI-related social and environmental changes on STH infection patterns is poorly understood, making it unclear which lifestyle factors should be targeted to better control disease spread. This cross-sectional study examines if household infrastructure associated with greater MI is associated with lower STH burdens among Indigenous Ecuadorian Shuar.

Methods

Paleopathological Research In Continental China: Introduction To The Special Section, Elizabeth Berger, Kate Pechenkina

Publications and Research

We set out to assemble this special issue of IJPP with three goals in mind: (1) to familiarize Anglophone readers with research on paleopathology conducted by Chinese scholars; (2) to enhance interest in paleopathological research among Chinese scholars, and to foster the use of differential diagnosis as the key mode of paleopathological analysis; and (3) to initiate integration of pathological analysis of human skeletal collections with historical records documenting early medical practices, epidemics, development and age-related diseases, and demographic records.

The collection of papers that follows present new data, from a range of time periods and geographic and social contexts, …

Exploring Sexual Dimorphism Of The Modern Human Talus Through Geometric Morphometric Methods, Rita Sorrentino, Maria Giovanna Belcastro, Carla Figus, Nicholas B. Stephens, Kevin Turley, William Harcourt-Smith, Timothy M. Ryan, Stefano Benazzi

Publications and Research

Sex determination is a pivotal step in forensic and bioarchaeological fields.Generally,scholars focus on metric or qualitative morphological features,but in the last few years several contributions have applied geometric-morphometric (GM) techniques to overcome limitations of traditional approaches. In this study,we explore sexual dimorphism in modern human tali from three early 20th century populations (Sassari and Bologna, Italy; NewYork, USA) at intra- and interspecific population levels using geometric morphometric (GM) methods.Statistical analyses were performed using shape,form,and size variables.Our results do not show significant differences in shape between males and females, either considering the pooled sample or the individual populations. Differences in talar …

Convergence Of Human And Old World Monkey Gut Microbiomes Demonstrates The Importance Of Human Ecology Over Phylogeny, Katherine R. Amato, Elizabeth K. Mallott, Daniel Mcdonald, Nathaniel J. Dominy, Tony Goldberg, Joanna E. Lambert, Larissa Swedell, Jessica L. Metcalf, Andres Gomez, Gillian A. O. Britton, Rebecca M. Stumpf, Steven R. Leigh, Rob Knight

Publications and Research

Background

Comparative data from non-human primates provide insight into the processes that shaped the evolution of the human gut microbiome and highlight microbiome traits that differentiate humans from other primates. Here, in an effort to improve our understanding of the human microbiome, we compare gut microbiome composition and functional potential in 14 populations of humans from ten nations and 18 species of wild, non-human primates.

Results

Contrary to expectations from host phylogenetics, we find that human gut microbiome composition and functional potential are more similar to those of cercopithecines, a subfamily of Old World monkey, particularly baboons, than to those …

From The Human To The Planetary: Speculative Futures Of Care, Miriam Ticktin

Publications and Research

This is largely a theoretical, speculative essay that takes on the question of what ‘care’ looks like at a moment when climate change is increasingly taking center stage in public and political discussions. Starting with two new practices, namely, humanitarian care for nonhumans and One Health collaborations, I seek to determine what forms of political care can incorporate the well-being of future generations and future iterations of the earth. After an exploration of One Health as an approach to planetary care, I ask what its parts enable us to think, despite its limitations; I focus on the new human-nonhuman assemblages …

An Early Modern Human Outside Africa, Eric Delson

Publications and Research

Analysis of two fossils from a Greek cave has shed light on early hominins in Eurasia. One fossil is the earliest known specimen of Homo sapiens found outside Africa; the other is a Neanderthal who lived 40,000 years later.

Microdamage As A Bone Quality Component: Practical Guidelines For The Two‐Dimensional Analysis Of Linear Microcracks In Human Cortical Bone, Victoria M. Dominguez, Amanda M. Agnew

Publications and Research

Microdamage is a component of bone quality believed to play an integral role in bone health. However, comparability between existing studies is fraught with issues due to highly variable methods of sample preparation and poorly defined quantification criteria. To address these issues, this article has two aims. First, detailed methods for preparation and analysis of linear microcracks in human ribs, specifically addressing troubleshooting issues cited in previous studies, are laid out. Second, new, partially validated criteria are proposed in an effort to reduce subjective differences in microcrack counts and measures, ensuring more comparable results between studies. Revised definitions based on …

Evolution Of The Modern Baboon (Papio Hamadryas): A Reassessment Of The African Plio-Pleistocene Record, Christopher C. Gilbert, Stephen R. Frost, Kelsey D. Pugh, Monya Anderson, Eric Delson

Publications and Research

Baboons ( Papio hamadryas) are among the most successful extant primates, with a minimum of six distinctive forms throughout Sub-Saharan Africa. However, their presence in the fossil record is unclear. Three early fossil taxa are generally recognized, all from South Africa: Papio izodi , Papio robinsoni and Papio angusticeps. Because of their derived appearance, P. angusticeps and P. robinsoni have sometimes been considered subspecies of P. hamadryas and have been used as biochronological markers for the Plio- Pleistocene hominin sites where they are found.

We reexamined fossil Papio forms from across Africa with an emphasis on their distinguishing features and …

Phylogenetic Relationships Of Living And Fossil African Papionins: Combined Evidence From Morphology And Molecules, Kelsey D. Pugh, Christopher C. Gilbert

Publications and Research

No abstract provided.

Evaluating Causes Of Error In Landmark-Based Data Collection Using Scanners, Brian M. Shearer, Siobhan B. Cooke, Lauren B. Halenar, Samantha L. Reber, Jeannette E. Plummer, Eric Delson, Melissa Tallman

Publications and Research

In this study, we assess the precision, accuracy, and repeatability of craniodental landmarks (Types I, II, and III, plus curves of semilandmarks) on a single macaque cranium digitally reconstructed with three different surface scanners and a microCT scanner. Nine researchers with varying degrees of osteological and geometric morphometric knowledge landmarked ten iterations of each scan (40 total) to test the effects of scan quality, researcher experience, and landmark type on levels of intra- and interobserver error. Two researchers additionally landmarked ten specimens from seven different macaque species using the same landmark protocol to test the effects of the previously listed …

La Souffrance Animale À Distance: Des Vétérinaires Dans L’Action Humanitaire, Frédéric Keck, Miriam Ticktin

Publications and Research

Résumé

Cet article étudie le rôle des vétérinaires dans l’humanitaire à partir de deux types de pratique : la défense des animaux contre la cruauté et la surveillance des animaux touchés par les épidémies. En suivant l’extension de l’action humanitaire aux animaux comme nouvelles figures de victimes innocentes, nous cherchons à dépasser l’approche compassionnelle de l’humanitaire pour étudier les nouvelles formes scientifiques impliquant des non-humains, comme la médecine vétérinaire légale, les neurosciences et l’immunologie. Nous soutenons finalement que ces sciences produisent de nouveaux collectifs d’humains et de non-humains.

Abstract

This article traces the role of veterinarians in humanitarian action, focusing …

Minerals In The Foods Eaten By Mountain Gorillas (Gorilla Beringei), Emma C. Cancelliere, Nicole Deangelis, John Bosco Nkurunungi, David R. Raubenheimer, Jessica M. Rothman

Publications and Research

Minerals are critical to an individual’s health and fitness, and yet little is known about mineral nutrition and requirements in free-ranging primates. We estimated the mineral content of foods consumed by mountain gorillas (Gorilla beringei beringei) in the Bwindi Impenetrable National Park, Uganda. Mountain gorillas acquire the majority of their minerals from herbaceous leaves, which constitute the bulk of their diet. However, less commonly eaten foods were sometimes found to be higher in specific minerals, suggesting their potential importance. A principal component analysis demonstrated little correlation among minerals in food items, which further suggests that mountain gorillas might increase dietary …

30 Days In The Life: Daily Nutrient Balancing In A Wild Chacma Baboon, Caley A. Johnson, David Raubenheimer, Jessica M. Rothman, David Clarke, Larissa Swedell

Publications and Research

For most animals, the ability to regulate intake of specific nutrients is vital to fitness. Recent studies have demonstrated nutrient regulation in nonhuman primates over periods of one observation day, though studies of humans indicate that such regulation extends to longer time frames. Little is known about longer-term regulation in nonhuman primates, however, due to the challenges of multiple-day focal follows. Here we present the first detailed study of nutrient intake across multiple days in a wild nonhuman primate. We conducted 30 consecutive all day follows on one female chacma baboon (Papio hamadryas ursinus) in the Cape Peninsula of South …

Evolution And Allometry Of Calcaneal Elongation In Living And Extinct Primates, Doug M. Boyer, Erik R. Seiffert, Justin T. Gladman, Jonathan I. Bloch

Publications and Research

Specialized acrobatic leaping has been recognized as a key adaptive trait tied to the origin and subsequent radiation of euprimates based on its observed frequency in extant primates and inferred frequency in extinct early euprimates. Hypothesized skeletal correlates include elongated tarsal elements, which would be expected to aid leaping by allowing for increased rates and durations of propulsive acceleration at takeoff. Alternatively, authors of a recent study argued that pronounced distal calcaneal elongation of euprimates (compared to other mammalian taxa) was related primarily to specialized pedal grasping. Testing for correlations between calcaneal elongation and leaping versus grasping is complicated by …

Cladistic Analysis Of Extant And Fossil African Papionins Using Craniodental Data, Christopher C. Gilbert

Publications and Research

No abstract provided.

Male Aggression Towards Females In Hamadryas Baboons: Conditioning, Coercion And Control, Larissa Swedell, Amy Schreier

Publications and Research

No abstract provided.

The Fourth Level Of Social Structure In A Multi-Level Society: Ecological & Social Functions Of Clans In Hamadryas Baboons, Amy Schreier, Larissa Swedell

Publications and Research

Hamadryas baboons are known for their complex, multi-level social structure consisting of troops, bands, and one-male units (OMUs) [Kummer, 1968]. Abegglen [1984] observed a 4^th level of social structure comprising several OMUs that rested near one another on sleeping cliffs, traveled most closely together during daily foraging, and sometimes traveled as subgroups independently from the rest of the band. Abegglen called these associations “clans” and suggested that they consisted of related males. Here we confirm the existence of clans in a second wild hamadryas population, a band of about 200 baboons at the Filoha site in lowland Ethiopia. During …

Use Of Palm Trees As A Sleeping Site By Hamadryas Baboons In Ethiopia, Amy Schreier, Larissa Swedell

Publications and Research

Hamadryas baboons sleep on cliffs throughout their range, and this can be attributed to the safety cliffs provide against predators in the absence of tall trees. In this paper, we report the first documented occurrence of hamadryas baboons sleeping in doum palm trees rather than on cliffs. Data derive from a study of hamadryas baboons at the Filoha site in lowland Ethiopia. During all-day follows, data were collected on travel patterns, band activity, and location. Variation in the baboons’ home range was characterized using vegetation transects. We discovered that one band in this population, Band 3, occasionally slept in doum …

Composition And Seasonality Of Diet In Wild Hamadryas Baboons: Preliminary Findings From Filoha, Larissa Swedell, Getenet Hailemeskel, Amy Schreier

Publications and Research

Here we report the first year-round quantitative data on dietary composition and seasonality in wild hamadryas baboons. Study subjects were adult male members of Band 3 at the Filoha field site in central lowland Ethiopia. Data collection consisted of 10-minute focal samples during all-day follows 4-6 days per month over the course of one year. The two largest contributors to the diet were Hyphaene thebaica and Acacia senegal, and these were the only plant species found in the diet during every month of the year. Other relatively major contributors to the diet, such as Cyperus grandibulbosus, Seddera bagshawei, …

Strategies Of Sex And Survival In Hamadryas Baboons: Through A Female Lens, Larissa Swedell

Publications and Research

No abstract provided.

Perspectives On Reproduction And Life History In Baboons, Larissa Swedell, Steven R. Leigh

Publications and Research

No abstract provided.

Infant Mortality After Takeovers In Wild Ethiopian Hamadryas Baboons, Larissa Swedell, Teklu Tesfaye

Publications and Research

In this paper, we report the first observational evidence of infanticide in wild hamadryas baboons. The study group inhabits the lowlands of the northern Rift Valley in Ethiopia and has been under observation for over 1200 hours, on and off, since October 1996. Here we report observations from August and September 2002 of the consequences of two takeovers of known females with black infants. After the first takeover, the respective infant disappeared and was presumed dead within eleven days of the takeover. After the second takeover, the infant incurred repeated severe aggression from its mother’s new leader male and eventually …

Affiliation Among Females In Wild Hamadryas Baboons (Papio Hamadryas Hamadryas), Larissa Swedell

Publications and Research

Previous studies of hamadryas baboons have described a “star-shaped” sociogram, whereby the strongest social bonds within hamadryas one-male units are those between a leader male and his females and bonds among females are weak by comparison. This type of social organization has also been called “cross bonding” to distinguish it from the “female bonding” found in most papionin monkeys. Models of female primate socioecology have suggested that hamadryas baboons lack female bonding due to their reliance on scarce, widely-dispersed food resources. Here I report observational data from a wild population of hamadryas baboons in Ethiopia indicating that, while females varied …