Comparative Anatomical Study of the Thoracic Limb Skeleton in the Chinchilla (C. Lanigera) and in the Domestic Rabbit (O. Cuniculus)

Irina IRIMESCU, Delia BOB, Calin POP, Aurel DAMIAN


Chinchillas, currently growing in popularity as pets, lack detailed anatomical descriptions of their skeleton. The advanced anatomic knowledge of Domestic Rabbits offers a good reference point. Thus, we performed a detailed assessment of the Chinchilla’s thoracic limb skeleton features, compared to the Rabbit’s, in order to provide basic data for clinicians and researchers in the orthopedic field. 10 thoracic limb skeletons of Chinchillas and Domestic Rabbit, respectively, were examined and compared. The Chinchilla’s thoracic girdle notably includes a clavicle, which is absent in Rabbits. Its scapula presents a similar frame, but a tighter supraspinous/infraspinous fossa ratio (1:1) and a shorter metacromion. The distal epiphysis of the humerus distinctly presents only one condyle in the Chinchilla. Its ulna and radius are equally well developed. The autopodium of both species is similar in shape and bone composition, counting five digits. In conclusion, although thoracic limb skeleton similarities between the Chinchilla and of the Domestic Rabbit suggest that clinicians can use the latter as reference species when confronted with orthopedic pathology of the former, the underlined differences in the thoracic girdle and humerus between the two species must be taken in consideration when imaging diagnostic and treatments of these bones are required.


thoracic limb skeleton, Chinchilla lanigera, Oryctolagus cuniculus

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