Osteology and radiology of the Maned Wolf (<i>Chrysocyon brachyurus</i>) pelvic limb

Siqueira, Rafael Cerântola; Rahal, Sheila Canevese; Inamassu, Letícia Rocha; Mamprim, Maria Jaqueline; Félix, Marcílio; Castilho, Maíra Sales; Mesquita, Luciane dos Reis; Ribeiro, V. L.; Teixeira, Carlos Roberto; Rassy, Fabrício Braga

doi:10.1111/ahe.12314

Cited by 10 publications

(9 citation statements)

References 12 publications

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“…Paula Couto, 1979;Prevosti and Vizcaíno, 2006;Reis et al, 2006;Soibelzon and Tartarini, 2009), but their femurs are proportionately more robust and thick. The studied specimen presents morphology and size compatible with the material of Siqueira et al (2017), who described the posterior locomotor appendage of C. brachyurus extensively. The taxon has previously been recorded in Pleistocene faunas in Minas Gerais (Cartelle, 1999).…”

Section: Systematic Paleontologysupporting

confidence: 61%

Diversity and preservation of Pleistocene tetrapods from caves of southwestern Bahia, Brazil

Silva

Berbert-Born²,

Bustamante

et al. 2019

Journal of South American Earth Sciences

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The study of two caves from the Serra do Ramalho region is here presented, this is one of the most important karstic areas in Brazil. A taxonomic analysis revealed 29 taxa including Xenarthra, Cetartiodactyla and Carnivora, ranging from Late Pleistocene to Early Holocene. Taphonomic studies reveal taphocoenosis consisting mainly of complete elements, without significant transportation, but also of transported elements, composing spatial-mixed, predominantly in situ-preserved assemblages. The predominance of Xenarthrans found within the caves is probably biased by a taphonomic pattern since these animals would have life habits related to cave environments, therefore with higher chances of preservation. There is evidence of accidental death of the scelidotheriines in Lapa dos Peixes cave, where entrapment of the animals during one or more events of river flooding is pointed as a hypothesis. Deposition took place within different periods of dry and humid climate incorporating bones in clastic and chemical deposits. Cycles of sedimentary deposition and reworking (erosion) may have acted in generating complex and overlapping depositional patterns with time averaging. During depositional phase, while the cave environment was occupied rather by Xenarthrans, parts of other animals were transported in the scope of fluvial systems and gravity loads, as well as by accidental falling or scavengers. The sedimentary deposits are currently being eroded by rain runoff in both caves, causing the reallocation of finer sediments to deeper conduits but the fossils keep close to their original location. This process is exposing a large amount of fossils, allowing extensive sampling which would be impossible with active excavations, since it would require an excessively longer time and damages to the caves.

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Section: Systematic Paleontologysupporting

confidence: 61%

Diversity and preservation of Pleistocene tetrapods from caves of southwestern Bahia, Brazil

Silva

Berbert-Born²,

Bustamante

et al. 2019

Journal of South American Earth Sciences

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“…The presence of relatively short and stout MT bones with rudimentary MTI in greater cane rats is most likely related to fossorial adaptation [ 44 ]. In cursorial animals, the MT bones are elongated and close to each other with the MTI being reduced or absent [ 46 ]. The radiological visualisation of the os penis in this species should not be mistaken as soft tissue mineralisation.…”

Section: Discussionmentioning

confidence: 99%

Radiological Anatomy of the Pelvis and Pelvic Limb of the Greater Cane Rat (Thryonomys swinderianus)

Mpagike,

Makungu

2024

Veterinary Medicine International

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Greater cane rats (Thryonomys swinderianus) are now being captive reared and domesticated in the sub-Saharan Africa because of increase in their demand for biomedical research and traditional medicine and as a source of meat. This research was performed to provide the normal radiological anatomy of the pelvis and pelvic limb in greater cane rats for a reference in biomedical research, in anatomical studies, and in clinical use. Radiological examination of the pelvis and right pelvic limb was done in five greater cane rats. Radiological results were correlated with bones of the pelvis and right pelvic limb. The pelvic bone had a prominent caudoventral iliac spine. The pelvic symphysis was long and obturator foramina appeared teardrop-shaped elongated craniocaudally. The prominent major trochanter extended proximally higher than the femoral head. The middle third of the body of the tibia presented a very prominent tuberosity. In all specimens, the tarsal sesamoid bone was visualised. Mineralised popliteal sesamoid bone was not visualised. In male greater cane rats, the os penis was visualised. The lateral and medial menisci of the stifle joint were seen with ossicles. The first metatarsal bone was rudimentary with greater plantar divergence. Despite of the pelvic limb and pelvis of greater cane rats sharing anatomical structures with other rodents, it retains some exceptional anatomical features. Findings of this study will serve as a reference for anatomical studies, clinical veterinary practice, and in biomedical research.

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“…However, the bones are proportionally longer in relation to that of dogs, and the curvature of the femoral shaft seems similar to that of dogs with a relatively straight femoral axis, and the femoral length is slightly shorter than the tibia. 31 Thus, studies directed toward species are necessary. Plates of 160 mm in length were used, which corresponded to $47.9% of the bone length.…”

Section: Discussionmentioning

confidence: 99%

Influence of the Near-Cortical Over-Drilling Technique on the Mechanical Behaviour of Locking Plate Constructs Applied in Maned Wolf's Femur

Siqueira

Rahal

Mesquita

et al. 2022

Vet Comp Orthop Traumatol

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Objective The aim of this study was to evaluate the influence of near-cortical over-drilling holes on the mechanical behaviour of locking plate constructs applied in maned wolf's femur by using mechanical testing and finite element method (FEM). Study Design Seven pairs of adult maned wolves (Chrysocyon brachyurus) femur bones were randomly distributed into four groups. In all groups, a 3.5 mm locking compression plate, designed with 12 combi-holes and one locked, was applied to the lateral surface of the femur. G1 (n = 4) received bicortical locking screws placed in holes 1, 3, 5, 8, 10 and 12. In G2 (n = 5), the plate was applied as used in G1, but the application of the locked screws involved the near-cortical over-drilling technique. In G3 (n = 4), the plate was applied as used in G2, but the size of the near-cortical over-drilling was larger. The combi-holes 6 and 7 were maintained over a 10 mm fracture gap without screws. All constructs were tested for failure in the axial load. The axial load was applied eccentrically to the femoral head. Results Statistical differences were observed in the maximum load with G3 > G1 and G3 > G2, and in the deflection with G2 > G1 and G2 > G3. The FEM showed the lowest total displacement of the bone-plate constructs as well as of the plate in G1 compared with G2 and G3. Conclusion The near-cortical over-drilling technique used in unstable fractures induced in the maned wolf's femur showed by static axial compression test that maximum load and deflection are dependent on drill hole size induced in the near-cortex. Based on FEM, the lowest total displacement of the bone-plate constructs was observed in Group 1.

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Osteology and radiology of the Maned Wolf (Chrysocyon brachyurus) pelvic limb

Cited by 10 publications

References 12 publications

Diversity and preservation of Pleistocene tetrapods from caves of southwestern Bahia, Brazil

Diversity and preservation of Pleistocene tetrapods from caves of southwestern Bahia, Brazil

Radiological Anatomy of the Pelvis and Pelvic Limb of the Greater Cane Rat (Thryonomys swinderianus)

Influence of the Near-Cortical Over-Drilling Technique on the Mechanical Behaviour of Locking Plate Constructs Applied in Maned Wolf's Femur

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