Vascularization of the small intestine in lesser anteaters, Tamandua tetradactyla (Xenarthra: Myrmecophagidae)

Ferreira, Jussara Rocha; Souza, Ana Lúcia Rezende; Mortoza, Amanda Rocha; Rezende, Lorenna Cardoso

doi:10.1590/s1984-46702011000400010

Cited by 4 publications

(1 citation statement)

References 12 publications

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“…The length of the small intestine (108.05 ± 1.90 cm; Table ) is larger, as well as, for the giant anteater ( Myrmecophaga tridactyla ; 428.5 cm, Ferreira, Souza, Mortoza, & Rezende, ; 775.3 cm, Carvalho et al, ) than that of the sloth ( Bradypus variegatus ; 82.35 cm), which is a strictly herbivorous animal (Estrela, ), also a Xernathra specie. This comparison disagrees with the premise that herbivores (sloths) have a larger intestinal length than carnivores and omnivores, thus demonstrating that insect digestion is not necessarily rapid.…”

Section: Resultsmentioning

confidence: 92%

External and digestive system morphology of the Tamandua tetradactyla

Firmino

Pereira

Carvalho

et al. 2019

Anat Histol Embryol

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Collared anteater is present throughout the Brazilian territory, but its morphology is little known. This study aimed to trace its external biometric profile and its digestive system. Six cadavers (4 ± 0.16 kg) from Paraíba, Brazil, were used. The thoracic limbs were more robust when compared to pelvic. The length of the tail is below that described in specimens from south‐eastern Brazil, probably due to the greater use of the tail suspension function in the leafier forests in this region. The tongue had no papillae and had keratinized squamous epithelium. The oesophagus was tubular with keratinized squamous epithelium. The stomach was single‐chambered with simple prismatic epithelium and presence of tubular glands in the lamina propria. The pyloric region was thicker and had larger folds of mucosa; the greater curvature was approximately three times greater than the smaller. The small intestine was larger than that found in other Xernathra species such as sloth, an herbivore animal; in the large intestine, the caecum was small. The colon was subdivided ascending, transverse and descending, with simple prismatic epithelium. This study is the first to bring the description of the external and digestive system morphometrics of collared anteater adult and pup. The anatomical characteristics of the digestive system show that the digestion of the anteaters, although not using the fermentation, is not as rapid as in other Xenarthras, probably due to the material of the exoskeleton of the insects by them consumed. The data generate subsidies for the clinic, surgery, preservation and nutrition of this species.

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Section: Resultsmentioning

confidence: 92%

External and digestive system morphology of the Tamandua tetradactyla

Firmino

Pereira

Carvalho

et al. 2019

Anat Histol Embryol

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Topography and syntopy of abdominopelvic viscera of the giant anteater (Myrmecophage tridactyla - Linnaeus, 1758)

Oliveira

Lima

Silvino

et al. 2019

Arq. Bras. Med. Vet. Zootec.

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Topography and syntopy of abdominopelvic viscera of the giant anteater (Myrmecophage tridactyla -Linnaeus, 1758)  [Topografia e sintopia das vísceras abdominopélvicas do tamanduá-bandeira (Myrmecophage tridactyla -Linnaeus, 1758)] ABSTRACTIn view of the scarcity of data about the topography and syntopy of abdominopelvic viscera of the giant anteater (Myrmecophage tridactyla -Linnaeus, 1758), the present study aimed to elucidate these characteristics and to compare them with the other animal species, especially the domestic ones. Three specimens, two males and one female, were donated by the Environmental Military Police of Franca to the Anatomy Veterinary Laboratory of the University of Franca, after death by road killings. The animals were fixed and maintained in aqueous 10% formaldehyde solution, followed by conventional dissection of the abdominopelvic cavities for subsequent direct inspection and topographic description of the viscera, aiming at comparative analyzes with other species, whose positioning and particularities are already established in the literature. It was observed that most of the viscera of these cavities have similar location and syntopy to domestic animals, except for the kidneys and testicles. In view of the established methodology and the results obtained, it is accepted that more specimens of anteater, both genera, should be evaluated and registered scientifically to confirm the data of the current research and anatomical preconization of the abdominopelvic cavity, inasmuch anatomical individual variation are possible between animals of the same species. RESUMODiante da escassez de dados sobre a topografia e a sintopia das vísceras abdominopélvicas do tamanduá-bandeira (Myrmecophage tridactyla -Linnaeus, 1758), o presente estudo teve como objetivo elucidar essas características e compará-las com as demais espécies animais, mormente as domésticas. Utilizaram-se três espécimes, dois machos e uma fêmea, provenientes de doação da Polícia Militar Ambiental de Franca ao Laboratório de Anatomia Veterinária da Universidade de Franca, após óbitos por atropelamentos. Os animais foram fixados e mantidos em solução aquosa de formaldeído a 10%, seguidos de dissecação convencional das cavidades abdominopélvicas para posterior inspeção direta e descrição topográfica das vísceras, visando a análises comparativas com outras espécies, cujo posicionamento e cujas particularidades já são bem estabelecidos na literatura. Observou-se que a maioria das vísceras dessas cavidades possuem localização e sintopia similares aos animais domésticos, exceto os rins e os testículos. Diante da metodologia estabelecida e dos resultados obtidos, admite-se que mais espécimes de tamanduás-bandeiras, de ambos os gêneros, devam ser avaliados e registrados cientificamente, visando à confirmação dos dados da atual pesquisa e à preconização anatômica da cavidade abdominopélvica, visto que variações anatômicas individuais são passíveis entre animais da mesma espécie. Palavras-chave: anatomia animal, cavidade abdominopélvica, ...

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Xenarthras: topografia intestinal e relações vasculares com a serosa

Carvalho

Rezende

Ferreira

2020

Arq. Bras. Med. Vet. Zootec.

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RESUMO Xenarthras (Mammalia, Dasypodidae) das espécies Dasypus novemcinctus e Euphractus sexcinctus tiveram sua anatomia científica estudada em relação à topografia dos intestinos delgado e grosso, suas relações peritoniais, morfologia externa e irrigação. Medidas dos diferentes segmentos intestinais e do número de vasos a eles destinados foram tomadas para fins comparativos. O método previu: fixação (formol 7%); injeção de látex; dissecação e fotodocumentação. Espacialmente, embora os intestinos sejam fixados por dupla membrana peritoneal, como em outros vertebrados, nestes a serosa conectou o duodeno, o jejuno, o íleo e os cólons em um único ligamento fixado no dorso do animal. Duodeno e pâncreas, intraperitoniais, como o reto, fixaram-se nas pelves maior e menor, respectivamente e dorsalmente. Vasos derivados do tronco celíaco mesentérico e da aorta percorreram o interior do mesoduodeno, do mesentério comum, do mesocólon e do mesorreto, estando estes, ao longo de seus trajetos, relacionados às cadeias linfonodulares intestinais. O modelo de rotação peritoneal, a morfologia externa, bem como o modelo de vascularização intestinal, foram interpretados como basais, diferindo dos vertebrados recentes, conforme o suporte literário.

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Vascularization of the small intestine in lesser anteaters, Tamandua tetradactyla (Xenarthra: Myrmecophagidae)

Abstract: ABSTRACT. The blood supply in the small intestine of seven Tamandua tetradactyla (Linnaeus, 1758), was studied. The method included preparation of the macroscopic collection report, perfusion of the arterial network with water (40°C),

Cited by 4 publications

References 12 publications

External and digestive system morphology of the Tamandua tetradactyla

External and digestive system morphology of the Tamandua tetradactyla

Topography and syntopy of abdominopelvic viscera of the giant anteater (Myrmecophage tridactyla - Linnaeus, 1758)

Xenarthras: topografia intestinal e relações vasculares com a serosa

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