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https://www.readbyqxmd.com/read/27921292/cranial-joint-histology-in-the-mallard-duck-anas-platyrhynchos-new-insights-on-avian-cranial-kinesis
#1
Alida M Bailleul, Lawrence M Witmer, Casey M Holliday
The evolution of avian cranial kinesis is a phenomenon in part responsible for the remarkable diversity of avian feeding adaptations observable today. Although osteological, developmental and behavioral features of the feeding system are frequently studied, comparatively little is known about cranial joint skeletal tissue composition and morphology from a microscopic perspective. These data are key to understanding the developmental, biomechanical and evolutionary underpinnings of kinesis. Therefore, here we investigated joint microstructure in juvenile and adult mallard ducks (Anas platyrhynchos; Anseriformes)...
December 6, 2016: Journal of Anatomy
https://www.readbyqxmd.com/read/27896029/biology-of-tiny-animals-three-new-species-of-minute-salamanders-plethodontidae-thorius-from-oaxaca-mexico
#2
Gabriela Parra-Olea, Sean M Rovito, Mario García-París, Jessica A Maisano, David B Wake, James Hanken
We describe three new species of minute salamanders, genus Thorius, from the Sierra Madre del Sur of Oaxaca, Mexico. Until now only a single species, T. minutissimus, has been reported from this region, although molecular data have long shown extensive genetic differentiation among geographically disjunct populations. Adult Thorius pinicola sp. nov., T. longicaudus sp. nov., and T. tlaxiacus sp. nov. are larger than T. minutissimus and possess elliptical rather than oval nostrils; T. pinicola and T. longicaudus also have longer tails...
2016: PeerJ
https://www.readbyqxmd.com/read/27891036/complete-morphometric-analysis-of-jugular-foramen-and-its-clinical-implications
#3
Sushant Swaroop Das, Sandeep Saluja, Neelam Vasudeva
INTRODUCTION: Tumors affecting structures in the vicinity of jugular foramen such as glomus jugulare require microsurgical approach to access this region. These tumors tend to alter the normal architecture of the jugular foramen by invading it. Therefore, it is not feasible to have correct anatomic visualization of the foramen in the presence of such pathologies. Hence, a comprehensive knowledge of the jugular foramen is needed by all the neurosurgeons while doing surgery in this region...
October 2016: Journal of Craniovertebral Junction and Spine
https://www.readbyqxmd.com/read/27890208/-descriptive-radiographic-topographic-and-functional-anatomy-applied-to-distal-radius-fractures
#4
C Fontaine, R Bry, P Laronde, E Guerre, A Aumar
Extensive anatomical knowledge is needed in order to correctly treat distal radius fractures: normal and pathological osteology of the distal radius, distal radio-ulnar joint and radiocarpal joint-both on the descriptive and functional level-the neurovascular and muscular environments of the distal radius-which are essential to the surgical approaches-and the angles that need to be restored during the reduction. All of these concepts are broached in this article.
December 2016: Hand Surgery and Rehabilitation
https://www.readbyqxmd.com/read/27889860/rich-but-poor-life-in-the-roman-period-with-extreme-rheumatoid-arthritis
#5
REVIEW
Željana Bašić, Ivan Jerković, Ivana Kružić, Šimun Anđelinović
In a Sidonian sarcophagus, from the Late Antique/early Christian period, skeletal remains of two persons were found. One of them, male, 30-50 years old, was found almost completely ankylosed, with highly osteoporotic bones and prominent erosion of joint surfaces. We diagnosed rheumatoid arthritis based on the eroded odontoid process, mandibular condyles, distal humerus, proximal and distal ulna, as well ankylosed hand and foot bones. Despite the fact that ankyloses of vertebrae and sacroiliac joint could point towards ankylosing spondylitis, the lack of typical vertebral ankyloses and new bone formation led to exclusion...
November 26, 2016: Clinical Rheumatology
https://www.readbyqxmd.com/read/27878942/morphological-evolution-of-the-mammalian-jaw-adductor-complex
#6
Stephan Lautenschlager, Pamela Gill, Zhe-Xi Luo, Michael J Fagan, Emily J Rayfield
The evolution of the mammalian jaw during the transition from non-mammalian synapsids to crown mammals is a key event in vertebrate history and characterised by the gradual reduction of its individual bones into a single element and the concomitant transformation of the jaw joint and its incorporation into the middle ear complex. This osteological transformation is accompanied by a rearrangement and modification of the jaw adductor musculature, which is thought to have allowed the evolution of a more-efficient masticatory system in comparison to the plesiomorphic synapsid condition...
November 23, 2016: Biological Reviews of the Cambridge Philosophical Society
https://www.readbyqxmd.com/read/27852495/defining-the-differences-in-transverse-plane-trajectories-for-thoracic-pedicle-screw-insertion-anatomic-versus-medial
#7
William R Hotchkiss, Richard M Schwend, Patrick P Bosch, Heather J H Edgar, Bonnie N Young
STUDY DESIGN: Comparing thoracic pedicle screw trajectories, screw lengths, and starting points by examining osteologic specimens. OBJECTIVE: Describe a medial screw trajectory (MST) compared to a screw trajectory along the anatomic pedicle angle (APA) in terms of trajectory, screw length, and starting point. SUMMARY OF BACKGROUND DATA: Although thoracic pedicle screw insertion is commonly used for posterior fusion and instrumentation, there is little data to quantify an MST that avoids the great vessels and allows for greater screw purchase...
January 2016: Spine Deformity
https://www.readbyqxmd.com/read/27816095/editorial-commentary-the-hip-bone-s-connected-to-the-spine-bone-but-correlation-does-not-equal-causation
#8
EDITORIAL
Joshua D Harris
A significant correlation was observed between the degree of lumbar spine arthritis and 2 quantitative markers of cam morphology (alpha angle and anterior femoral head-neck offset) in a large osteological collection of cadaveric lumbar spine and femurs. Although this study does not prove causation, it does impart further insight into the "hip-spine syndrome" in nonarthritic hips with proximal femoral asphericity.
November 2016: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/27766642/new-species-of-the-miniature-genus-gelanoglanis-siluriformes-auchenipteridae-from-the-tocantins-river-basin-brazil-and-osteological-description-of-g-nanonocticolus
#9
B B Calegari, R E Reis
A new species of Gelanoglanis is described based on specimens collected in the Tocantins River, a tributary of the Amazon Basin. The new species is distinguished from congeners by unusual features to the genus such as the pelvic fin falling short of the urogenital opening by a distance larger than the anal-fin length, the first unbranched dorsal and pectoral-fin rays not ossified as spines, the dorsal-fin spinelet absent and the adipose fin in adults preceded by a long fleshy ridge. The new species is further distinguished from congeners by its soft, sinuous snout tip and morphometric proportions of the body and head...
October 21, 2016: Journal of Fish Biology
https://www.readbyqxmd.com/read/27761303/ecomorphological-analysis-of-the-astragalo-calcaneal-complex-in-rodents-and-inferences-of-locomotor-behaviours-in-extinct-rodent-species
#10
Samuel Ginot, Lionel Hautier, Laurent Marivaux, Monique Vianey-Liaud
Studies linking postcranial morphology with locomotion in mammals are common. However, such studies are mostly restricted to caviomorphs in rodents. We present here data from various families, belonging to the three main groups of rodents (Sciuroidea, Myodonta, and Ctenohystrica). The aim of this study is to define morphological indicators for the astragalus and calcaneus, which allow for inferences to be made about the locomotor behaviours in rodents. Several specimens were dissected and described to bridge the myology of the leg with the morphology of the bones of interest...
2016: PeerJ
https://www.readbyqxmd.com/read/27741209/pterygopalatine-fossa-anatomy-for-a-surgical-approach-to-sphenopalatine-ganglion
#11
Russell S Frautschi, Brianna Halasa, Susan Orra, Karolina Mlynek, Charles P Steiner, Francis A Papay
The sphenopalatine ganglion is an extracranial neural structure within the pterygopalatine fossa. Modulation of this region via implantation of a neuromodulatory device presents a novel therapy for the treatment of facial and head pain. Yet sex, race, and genetic factors contribute to morphological variations between individuals. This study defines the standards and variations of the bony landmarks surrounding the pterygopalatine fossa. One hundred dry skulls were analyzed from the Hamann-Todd osteological collection...
October 2016: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/27739056/anal-fin-ray-morphology-indicates-sexual-maturity-in-brevimyrus-niger-teleostei-mormyridae
#12
S K Stell, P Moller
This osteological survey of 249 specimens of Brevimyrus niger ranging in size from 44 to 137 mm standard length (LS ) demonstrated that developmental changes in anal-fin morphology can serve as a predictor of sexual maturity in this species. Anal-fin ray bases begin to expand when fish reach c. 90 mm LS at which size and above there were roughly equal numbers of individuals observed with expanded and unmodified anal-fin bases, reflecting a 1:1 sex ratio.
October 14, 2016: Journal of Fish Biology
https://www.readbyqxmd.com/read/27737576/changes-in-clavicle-length-and-maturation-in-americans-1840-1980
#13
Natalie R Langley, Sandra Cridlin
Secular changes refer to short-term biological changes ostensibly due to environmental factors. Two well-documented secular trends in many populations are earlier age of menarche and increasing stature. This study synthesizes data on maximum clavicle length and fusion of the medial epiphysis in 1840-1980 American birth cohorts to provide a comprehensive assessment of developmental and morphological change in the clavicle. Clavicles from the Hamann-Todd Human Osteological Collection (n = 354), McKern and Stewart Korean War males (n = 341), Forensic Anthropology Data Bank (n = 1,239), and the McCormick Clavicle Collection (n = 1,137) were used in the analysis...
January 2016: Human Biology
https://www.readbyqxmd.com/read/27736882/phylogenetic-systematics-biogeography-and-ecology-of-the-electric-fish-genus-brachyhypopomus-ostariophysi-gymnotiformes
#14
William G R Crampton, Carlos David de Santana, Joseph C Waddell, Nathan R Lovejoy
A species-level phylogenetic reconstruction of the Neotropical bluntnose knifefish genus Brachyhypopomus (Gymnotiformes, Hypopomidae) is presented, based on 60 morphological characters, approximately 1100 base pairs of the mitochondrial cytb gene, and approximately 1000 base pairs of the nuclear rag2 gene. The phylogeny includes 28 species of Brachyhypopomus and nine outgroup species from nine other gymnotiform genera, including seven in the superfamily Rhamphichthyoidea (Hypopomidae and Rhamphichthyidae). Parsimony and Bayesian total evidence phylogenetic analyses confirm the monophyly of the genus, and identify nine robust species groups...
2016: PloS One
https://www.readbyqxmd.com/read/27706250/a-new-giant-titanosauria-dinosauria-sauropoda-from-the-late-cretaceous-bauru-group-brazil
#15
Kamila L N Bandeira, Felipe Medeiros Simbras, Elaine Batista Machado, Diogenes de Almeida Campos, Gustavo R Oliveira, Alexander W A Kellner
Titanosaurian dinosaurs include some of the largest land-living animals that ever existed, and most were discovered in Cretaceous deposits of Argentina. Here we describe the first Brazilian gigantic titanosaur, Austroposeidon magnificus gen. et sp. nov., from the Late Cretaceous Presidente Prudente Formation (Bauru Group, Paraná Basin), São Paulo State, southeast Brazil. The size of this animal is estimated around 25 meters. It consists of a partial vertebral column composed by the last two cervical and the first dorsal vertebrae, all fairly complete and incomplete portions of at least one sacral and seven dorsal elements...
2016: PloS One
https://www.readbyqxmd.com/read/27701203/validity-and-redescription-of-profundulus-balsanus-ahl-1935-cyprinodontiformes-profundulidae
#16
José A Jamangapé O, Ernesto Velázquez-Velázquez, Emilio Martínez-Ramirez, Manuel J Anzueto-Calvo, Eyda L Gomez, Sara E Dominguez-Cisneros, Caleb D Mcmahan, Wilfredo A Matamoros
Profundulus balsanus was described by Ahl in 1935 and later placed in synonymy with P. punctatus. Recent molecular studies have demonstrated that specimens identified as P. balsanus belong to a distinct taxon. Herein we used a combination of morphometric, meristic, coloration and osteological data in order to demonstrate the distinctiveness of P. balsanus. Additionally, we used molecular data to reconstruct a phylogeny to place P. balsanus in a systematic context. Profundulus balsanus belongs to the punctatus clade within the genus Profundulus...
October 2, 2016: Zootaxa
https://www.readbyqxmd.com/read/27690337/determination-of-sex-from-the-patella-in-a-contemporary-spanish-population
#17
Tanya R Peckmann, Susan Meek, Natasha Dilkie, Andrew Rozendaal
The skull and pelvis have been used for the determination of sex for unknown human remains. However, in forensic cases where skeletal remains often exhibit postmortem damage and taphonomic changes the patella may be used for the determination of sex as it is a preservationally favoured bone. The goal of the present research was to derive discriminant function equations from the patella for estimation of sex from a contemporary Spanish population. Six parameters were measured on 106 individuals (55 males and 51 females), ranging in age from 22 to 85 years old, from the Granada Osteological Collection...
September 27, 2016: Journal of Forensic and Legal Medicine
https://www.readbyqxmd.com/read/27677399/the-origin-and-phylogenetic-relationships-of-the-new-zealand-ravens
#18
R Paul Scofield, Kieren J Mitchell, Jamie R Wood, Vanesa L De Pietri, Scott Jarvie, Bastien Llamas, Alan Cooper
The relationships of the extinct New Zealand ravens (Corvus spp.) are poorly understood. We sequenced the mitogenomes of the two currently recognised species and found they were sister-taxa to a clade comprising the Australian raven, little raven, and forest raven (C.coronoides, C. mellori and C. tasmanicus respectively). The divergence between the New Zealand ravens and Australian raven clade occurred in the latest Pliocene, which coincides with the onset of glacial deforestation. We also found that the divergence between the two putative New Zealand species C...
September 24, 2016: Molecular Phylogenetics and Evolution
https://www.readbyqxmd.com/read/27662358/redescription-and-geographical-distribution-of-the-endangered-fish-ossubtus-xinguense-j%C3%A3-gu-1992-characiformes-serrasalmidae-with-comments-on-conservation-of-the-rheophilic-fauna-of-the-xingu-river
#19
Marcelo C Andrade, Leandro M Sousa, Rafaela P Ota, Michel Jégu, Tommaso Giarrizzo
The monotypic species Ossubtus xinguense was originally described based on scarce material putatively divided into juveniles and adults. Ossubtus xinguense has a restricted distribution and was previously known only from a few rapids downstream of the city of Altamira, in the Volta Grande stretch of the Middle Xingu River. Until recently, the species was rare in museums because its habitat (large rapids) is difficult to sample. Large-scale collecting efforts targeting rapids throughout the Xingu River basin have yielded an abundance of new material...
2016: PloS One
https://www.readbyqxmd.com/read/27660824/early-osteological-development-of-larvae-and-juveniles-in-red-spotted-grouper-epinephelus-akaara-pisces-serranidae
#20
Jong Youn Park, Kyeong Ho Han, Jae Kwon Cho, Jeong In Myeong, Jae Min Park
We observed the osteological development of larval and juvenile red spotted grouper (Epinephelus akaara) in order to generate data for the assessment of skeletal deformities and to inform phylogenetic systematics research. Larvae and juveniles were obtained from a aquafarm in Muan-gun, Jeolla-namdo Province, Korea. The average water temperature at the time of breeding was 23.0°C and average water salinity was 33.0 psu. Freshly hatched fish larvae had not undergone any ossification, but ossification of the parasphenoid bone, which forms the base of the cranium, occurred as the juveniles reached an average body length (BL) of 2...
June 2016: Balsaeng'gwa Saengsig
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