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The first ornithocheiromorph humerus from Wuerho (Urho), China, with a new isotopic age of the Tugulu Group.
An Acad Bras Cienc
January 2025
Chinese Academy of Sciences, Institute of Vertebrate Paleontology and Paleoanthropology, Key Laboratory of Vertebrate Evolution and Human Origins, Beijing, 100044, China.
Pterosaur remains are rare from the lowermost Cretaceous, hampering our understanding of the taxonomic and morphological diversities of pterosaurs during this period. The Lower Cretaceous Tugulu Group in Wuerho, China is renowned for hosting the Wuerho Pterosaurian Fauna (WPF), which has so far yielded numerous fossil remains of two dsungaripterid pterosaurs, Dsungaripterus weii and Noripterus complicidens. Here we report a partial ornithocheiromorph humerus from the WPF, representing a deeply divergent clade from Dsungaripteridae.
View Article and Find Full Text PDFDog skull shape challenges assumptions of performance specialization from selective breeding.
Sci Adv
January 2025
Schmid College of Science and Technology, Chapman University, Orange, CA 92866, USA.
Through selective breeding, humans have driven exceptional morphological diversity in domestic dogs, creating more than 200 recognized breeds developed for specialized functional tasks such as herding, protection, and hunting. Here, we use three-dimensional reconstructions of dog skulls to ask whether these function-oriented kennel-club groups reflect differences in morphology that correspond to those functions. We analyzed 117 canid skulls, representing 40 domestic dog breeds and 18 wild subspecies, using geometric morphometric techniques and -means clustering.
View Article and Find Full Text PDFCytology to More Clearly Distinguish Solitary Plasmacytoma at the Skull Base.
Diagn Cytopathol
January 2025
Department of Neurosurgery, Medical University of South Carolina, Charleston, South Carolina, USA.
Solitary plasmacytomas are localized single tumors of monoclonal plasma cells that occur in two variants: solitary plasmacytoma of bone and extraosseous plasmacytoma. Solitary plasmacytoma of bone accounts for only 1%-2% of plasma cell lesions, and extraosseous plasmacytoma is also approximately 1%. These are both very uncommon at the skull base.
View Article and Find Full Text PDFLumbar intervertebral disc calcification with massive herniation: a case report.
J Int Med Res
January 2025
Department of Orthopaedics, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine; Key Laboratory of Musculoskeletal System Degeneration and Regeneration Translational Research of Zhejiang Province, Hangzhou, China.
An 18-year-old female patient presented with a 1-month history of low back pain, which had worsened and was accompanied by radiating pain in the right lower limb for half a month. She was admitted to our hospital with computed tomography and magnetic resonance imaging findings suggesting calcification of the L3/4 disc and a large intraspinal mass at the L2-4 level. The patient's symptoms did not improve with conservative treatment, and her muscle strength rapidly declined.
View Article and Find Full Text PDFQuantifying Bone Collagen Fingerprint Variation Between Species.
Mol Ecol Resour
January 2025
Manchester Institute of Biotechnology, School of Natural Sciences, University of Manchester, Manchester, UK.
Collagen is the most ubiquitous protein in the animal kingdom and one of the most abundant proteins on Earth. Despite having a relatively repetitive amino acid sequence motif that enables its triple helical structure, in type 1 collagen, that dominates skin and bone, there is enough variation for its increasing use for the biomolecular species identification of animal tissues processed or degraded beyond the amenability of DNA-based analyses. In recent years, this has been most commonly achieved through the technique of collagen peptide mass fingerprinting (PMF) known as ZooMS (Zooarchaeology by Mass Spectrometry), applied to the analysis of tens of thousands of samples across over one hundred studies in the past decade alone.
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