CRANIOMETRIA EM LOBOS-GUARÁ Chrysocyon brachyurus ILLIGER, 1815 (CARNIVORA, CANIDAE)

Santos, André Luíz Quagliatto; Paz, Beatriz; Barros, Rafael Ferraz de; Nalla, Susana Faria; Pereira, Thiago Souza

doi:10.1590/1089-6891v18e-37693

Cited by 6 publications

(5 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…An example is the study by Neto et al [62], who qualified the skull type as mesocephalic in the crab-eating fox based on the skull measurements. Numerous studies on craniometry or skull morphology carried out by scientists significantly focused on the cranial ontogenesis and the relationship between the skull form and the developmental, ecological, and evolutionary aspects, although skull types have not been categorized in other Canidae [63][64][65][66][67][68][69][70][71][72][73][74]. This significantly limits correlation studies of the skull mophometry and the orbit morphometry performed by veterinarians specialized in veterinary ophthalmology of wild or captive animals.…”

Section: The Bony Orbitmentioning

confidence: 99%

Anatomical and morphometric evaluation of the orbit, eye tunics, eyelids and orbital glands of the captive females of the South African painted dog (Lycaon pictus pictus Temminck, 1820) (Caniformia: Canidae)

Paszta

Klećkowska‐Nawrot

Goździewska‐Harłajczuk

2021

PLoS ONE

View full text Add to dashboard Cite

In this study, we present the first data concerning the anatomical, morphometrical, histological and histochemical study of the orbit, eye tunics, eyelids and orbital glands in South African Painted Dogs (Lycaon pictus pictus). The study was performed using eyeball morphometry, analysis of the bony orbit including its morphometry, macroscopic study, morphometry, histological examination of the eye tunics and chosen accessory organs of the eye and histochemical analysis. The orbit was funnel shaped and was open-type. There was a single ethmoid opening for the ethmoid nerve on the orbital lamina. The pupil was round, while the ciliary body occupied a relatively wide zone. The iris was brown and retina had a pigmented area. The cellular tapetum lucidum was semi-circular and milky and was composed of 14–17 layers of tapetal cells arranged in a bricklike structure. In the lower eyelid, there was a single conjunctival lymph nodule aggregate. One or two additional large conjunctval folds were observed within the posterior surface of the upper eyelids. The superficial gland of the third eyelid had a serous nature. The third eyelid was T-shaped and was composed of hyaline tissue. Two to three conjunctival lymph nodul aggregates were present within the bulbar conjunctiva of the third eyelid. The lacrimal gland produced a sero-mucous secretion. A detailed anatomic analysis of the eye area in the captive South African Painted Dogs females showed the similarities (especially in the histological examination of the eyetunics and orbital glands) as well as the differences between the Painted dog and the other representatives of Canidae. The differences included the shape and size od the orbita with comparison to the domestic dog. Such differences in the orbit measurements are most likely associated with the skull type, which are defined in relation to domestic dogs. The presented results significantly expand the existing knowledge on comparative anatomy in the orbit, eye and chosen accessory organs in wild Canidae.

show abstract

Section: The Bony Orbitmentioning

confidence: 99%

Anatomical and morphometric evaluation of the orbit, eye tunics, eyelids and orbital glands of the captive females of the South African painted dog (Lycaon pictus pictus Temminck, 1820) (Caniformia: Canidae)

Paszta

Klećkowska‐Nawrot

Goździewska‐Harłajczuk

2021

PLoS ONE

View full text Add to dashboard Cite

show abstract

“…The capybaras of this study showed a dorsal triangular notch in the outline of the foramen magnum, different to what is reported for Cavia spp., where the foramen magnum has a straight or convex dorsal rim [2]. This notch has already been described in some rodents such as Gambian rat (Cricetomys gambianus) [16], and in other mammals species, such as four-toed hedgehog (Atelerix albiventris) [4], maned wolf (Chrysocyon brachyurus) [23], and dromedaries (Camelus dromedaries) [28]. In dogs, this contour profile of the foramen magnum has already been considered a morphological change present in these animals, however, recent studies consider this fact to be just an anatomical variation that does not cause harm in dogs [13], which is quite common in brachycephalic breeds and therefore has no functional meaning [3].…”

Section: Discussionmentioning

confidence: 80%

Skull of Capybara (Hydrochoerus hydrochaeris) - Morphometric Parameters

Ferrari

Pereira

Farha

et al. 2022

Acta Scientiae. Vet.

View full text Add to dashboard Cite

Background: The capybara (Hydrochoerus hydrochaeris) is the largest rodent in the world. They are territorial animals, and live in social groups, commonly occurring in anthropized area, what has attracted the attention of researchers in relation to this animal species, since it is the host of the Amblyomma cajennese tick that transmits spotted-fever to humans and are responsible for severe impact on livestock and public health. The skull is a part of the axial skeleton that enclosing the brain, sensory organs and digestive and respiratory structures. Moreover, the phenotypic appearance of the capybara head depends on the shape of the skull. Thus, the aim of this study was to describe the reference values of cranial measurements of capybaras. The knowledge of morphometric parameters of skull is pivotal for veterinary treatment of pathological conditions and taxonomic affiliation. Materials, Methods & Results: Eight capybaras (Hydrochoerus hydrochaeris) skulls were used in this study, irrespective of age and sex. The skulls belonging to the anatomical collection of the Laboratory of Wildlife Anatomy and Anatomical Museum, Department of Anatomy, Universidade Estadual Paulista Júlio de Mesquita Filho, UNESP, Botucatu, São Paulo. A total of 35 morphometric parameters were performed using a digital caliper and 6 cranial indices were calculated. All investigated features were expressed as mean ± standard deviation. Anatomically, capybara skull were elongated, rectangle-like and consisted of cranial and facial bones. The morphometric parameters were used to calculate the following craniometrics indices: skull index (57.86 ± 3.62), cranial index (50.49 ± 2.08), facial index (49.22 ± 3.82), basal index (33.98 ± 0.86), nasal index (26.73 ± 3.1), and the foramen magnum index (149.61 ± 1.07). Moreover, the facial part length (mean 137.90 mm) and cranium part length (mean 87.76 mm) also were calculated. The facial part length was a distance from the cribriform plate of the ethmoid bone to the rostral edge of the incisive bone and, the cranium part length was a distance from the external occipital protuberance to the cribriform plate of the ethmoid bone. Discussion: This study established morphometric parameters in the capybara skull. The craniometric measurements showed in this study are compatible with reported in other studies in the capybara skull, although the most parameters measured in this study were not calculated in previous studies of the capybara skull. Moreover, none of the cranial indices calculated in this study were previously calculated. Based on some cranial measurements, the 8 capybaras used in this study could be classified into subadult (4) and adults (4). The foramen magnum showed a dorsal triangular notch in the capybara skull differently from described in the Cavia spp., and similar to reported to other rodent as Gambian rat and other mammals species such as maned wolf, four-toed hedgehog, and dromedaries. The rectangular shape of the capybara skull is different from that found in other caviids rodents such as Brazilian guinea pig. The capybara skull showed greater development of the facial part in relation to the cranial part, which allows to relate the skull shape with the skull shape presented by dolichocephalics dogs. This feature is commonly reported in large caviomorph rodents. Probably, this morphology is compatible with the ecology and phylogeny of the species. Keywords: capybaras, craniometry, cranium, veterinary anatomy, wildlife.

show abstract

“…Nevertheless, the authors focussed on aspects related to the mastigatory force and did not concentrate on craniometric patterns. Furthermore, Santos et al (2017) realized a study with seven maned wolves (Chrysocyon brachyurus), verifying whether the craniometric data collected allows a classification of the skull type after Getty (1986). According to Hofmann-Appollo (2009), various wild canid species present an intermediate skull type, being classified as mesaticephalic and therefore resembling the domestic dogs.…”

Section: Introductionmentioning

confidence: 82%

Craniometry in Cerdocyon thous (Carnivora, Canidae)

et al. 2020

Self Cite

View full text Add to dashboard Cite

The objective of this study was to obtain data on craniometric parameters in the crab-eating fox (Cerdocyon thous) and to define the general skull type of this species, analysing whether the craniometric classification of domestic dogs can be applied. Eleven skulls of C. thous were included in the analysis, irrespective of age and sex. The location of nine craniometric points established for craniometry in domestic dogs was determined and based on the distances between these points, 17 craniometric parameters were measured. Those parameters were used to calculate the following six craniometric indices: 53.17 ± 2.54 mm skull index, 2.33 ± 0.08 mm craniofacial index, 59.17 ± 3.57 mm neurocranial index, 125.58 ± 6.63 mm facial index, 37.52 ± 2.65 mm basal index and the index of the foramen magnum 54.47 ± 3.48 mm. According to the analysed indices, the skull shape in C. thous can be classified as mesaticephalic.

show abstract

CRANIOMETRIA EM LOBOS-GUARÁ Chrysocyon brachyurus ILLIGER, 1815 (CARNIVORA, CANIDAE)

Cited by 6 publications

References 8 publications

Anatomical and morphometric evaluation of the orbit, eye tunics, eyelids and orbital glands of the captive females of the South African painted dog (Lycaon pictus pictus Temminck, 1820) (Caniformia: Canidae)

Anatomical and morphometric evaluation of the orbit, eye tunics, eyelids and orbital glands of the captive females of the South African painted dog (Lycaon pictus pictus Temminck, 1820) (Caniformia: Canidae)

Skull of Capybara (Hydrochoerus hydrochaeris) - Morphometric Parameters

Craniometry in Cerdocyon thous (Carnivora, Canidae)

Contact Info

Product

Resources

About