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Exploring developmental changes in femoral midneck cross-sectional properties.
Anat Rec (Hoboken)
December 2024
Laboratorio de Evolución Humana, Universidad de Burgos, Edificio I+D+i/CIBA, Burgos, Spain.
This research delves deeper into previous works on femoral cross-sectional properties during ontogeny by focusing for the first time on the human femoral midneck. The ontogenetic pattern of cross-sectional properties at femoral midneck is established and compared with those at three different femoral locations: the proximal femur, the midshaft, and the distal femur. The study sample includes 99 femora (70 non-adults and 29 adults) belonging to archaeological specimens.
View Article and Find Full Text PDFAnalyzing Patterns of Skeletal Indicators of Developmental Stress Through the Double Lens of Ontogeny and the Life Course Approach in a Contemporary Reference Sample.
Am J Biol Anthropol
January 2025
College of Population Health, University of New Mexico, Health Sciences Center, Albuquerque, New Mexico, USA.
Objectives: Skeletal indicators of developmental stress are commonly used to assess health, disease, and patterns of morbidity and mortality in past populations. Incorporating information about individual life history, such as adverse life events, allows for a more thorough understanding of their etiology. This paper adopts the double lens of ontogeny and the life course to analyze indicators of developmental stress in relation to known individual pathologies and developmental patterns of the cranium, vertebrae, and long bones.
View Article and Find Full Text PDFTolerance to insect herbivory increases with progressing plant development.
Plant Biol (Stuttg)
December 2024
Laboratory of Entomology, Plant Sciences, Wageningen University and Research, Wageningen, The Netherlands.
Plants can sustain various degrees of damage or compensate for tissue loss by regrowth without significant fitness costs. This tolerance to insect herbivory depends on the plant's developmental stage during which the damage is inflicted and on how much tissue is removed. Plant fitness correlates, that is, biomass and germination of seeds, were determined at different ontogenetic stages, vegetative, budding, or flowering stages of three annual brassicaceous species exposed to feeding by Pieris brassicae caterpillars at different intensities.
View Article and Find Full Text PDFBone histology and growth curve of the earliest ceratopsian from the Upper Jurassic of Junggar Basin, Northwest China.
PeerJ
December 2024
Key Laboratory of Vertebrate Evolution and Human Origins, Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, Beijing, China.
, the earliest known ceratopsian, is represented by dozens of specimens of different sizes collected from the Upper Jurassic of the Junggar Basin, northwestern China. Here, we present the first comprehensive study on the bone histology of based on ten specimens varying in size. Four ontogenetic stages are recognized: early juvenile, late juvenile, subadult, and adult.
View Article and Find Full Text PDFThe osteohistology of gorgonopsian therapsids and implications for Permo-Triassic theriodont growth.
J Anat
December 2024
Evolutionary Studies Institute, University of the Witwatersrand, Johannesburg, South Africa.
During the Late Permian, saber-toothed gorgonopsian therapsids were the dominant terrestrial predators, playing crucial roles as apex predators alongside therocephalian therapsids within Permian terrestrial ecosystems. The entire gorgonopsian clade went extinct during the Permo-Triassic mass extinction, leaving other therapsids to continue into the Triassic. Gorgonopsians have not been well studied, particularly in terms of their growth patterns, with only a few genera having undergone osteohistological analysis.
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