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Registros recuperados: 31
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Paleobiology of Pleistocene ground sloths (Xenarthra, Tardigrada): biomechanics, morphogeometry and ecomorphology applied to the masticatory apparatus Ameghiniana
Bargo,M. Susana; Vizcaíno,Sergio F..
The fossil xenarthrans include giant forms, the ground sloths (Tardigrada), characteristic of the mammal fauna of the Pleistocene of South America. Although most authors agree in considering them as herbivorous, these forms have not been studied in terms of detailed morpho-functional analyses of their masticatory apparatuses. The aim of this work is the study the masticatory apparatus of the large Pleistocene ground sloths Glossotherium robustum, Lestodon armatus, Mylodon darwini and Scelidotherium leptocephalum (Mylodontidae) applying biomecanichal and morphogeometrical methods, and to compare with the information obtained for Megatherium americanum (Megatheriidae). The results are integrated with recent ecomorphological analyses that include three...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Mammalia; Xenarthra; Tardigrada; Paleobiology; Masticatory apparatus.
Ano: 2008 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0002-70142008000100012
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Dental occlusal surface area in relation to body mass, food habits and other biological features in fossil xenarthrans Ameghiniana
Vizcaíno,Sergio F.; Bargo,M. Susana; Cassini,Guillermo H..
The Xenarthra includes the most intriguing mammals from the Cenozoic of South America: the glyptodonts (Cingulata) and the ground sloths (Tardigrada). Their masticatory apparatuses are diverse and peculiar, with a strongly reduced, hypselodont dentition that lacks enamel and displays different degrees of lobation. The goal of this study is to investigate the relationship between dental occlusal surface area (OSA) and diet, and other physiological factors in fossil xenarthrans. Over one hundred and fifty specimens, including living herbivorous epitherians and both extinct and living xenarthrans, were measured and photographed, and their OSA estimated and plotted against body mass. For most fossil xenarthrans OSA is smaller than expected for extant...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Mammalia; Xenarthra; Dental Occlusal Surface Area; Body mass; Diet; Physiology.
Ano: 2006 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0002-70142006000100002
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Morphology of the Diaphragm Muscle in Southern Tamandua (Tamandua tetradactyla) and its Importance in Cases of Traumatic Hernia Anais da ABC (AABC)
AZEVEDO,ÉRICA F.S.; SILVA,DANIELA R. COSTA E; NATIVIDADE,TAMIRES V.S.; GIESE,ELANE G.; LIMA,ANA RITA DE; SOARES,PAOLA C.; BRANCO,ÉRIKA.
ABSTRACT The wall of the diaphragm can be affected by changes caused by physical trauma, allowing the passage of viscera between the abdominal cavity and thoracic cavity, thus reducing the space for pulmonary expansion, leading to the formation of hernia and possible death. Thus, we aimed to characterize, size and determine the topography of the diaphragmatic muscle in the Southern Tamandua, since clinical and surgical activities in wild animals have become a reality more and more present in veterinary medicine. We used six adult animals, x-rayed and dissected, followed by collection of fragments of muscular portions for histological analysis. Initially we observed that the animals presented 17 thoracic vertebrae, 3 lumbar vertebrae and 5 sacral vertebrae....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Diaphragmatic hernia; Morphology; Tamandua tetradactyla; Xenarthra.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000401845
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Anatomical aspects of the nerves of the leg and foot of the giant anteater (Myrmecophaga tridactyla, Linnaeus, 1758) Arq. Bras. Med. Vet. Zootec.
Cruz,V.S.; Cardoso,J.C.; Araújo,L.B.M.; Souza,P.R.; Silva,M.S.B.; Araújo,E.G..
Although distal stifle joint nerve distribution has been well established in domestic animals, this approach is scarcely reported in wild animals. Therefore, the aim of this study was to describe the nerves of the leg and foot of Myrmecophaga tridactyla with emphasis on their ramification, distribution, topography and territory of innervation. For this purpose, six adult cadavers fixed and preserved in 10% formalin solution were used. The nerves of the leg and foot of the M. tridactylawere the saphenous nerve (femoral nerve branch), fibular and tibial nerves and lateral sural cutaneous nerve (branches of the sciatic nerve) and caudal sural cutaneous nerve (tibial nerve branch). The saphenous nerve branches to the skin, the craniomedial surface of the leg,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Pelvic limb; Peripheral nervous system; Xenarthra.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352014000501419
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Establishment of an anesthetic protocol for semen collection by electroejaculation in six-banded armadillos (Euphractus sexcinctus Linnaeus, 1758) Arq. Bras. Med. Vet. Zootec.
Sousa,P.C.; Amorim,R.N.L.; Lima,G.L.; Paiva,A.L.C.; Paula,V.V.; Freitas,C.I.A.; Silva,A.R..
ABSTRACT The aim was to verify the effects of different anesthetic protocols used during electroejaculation (EEJ) in six-banded armadillos (Euphractus sexcinctus). Four sexually matured animals were physically restrained and subjected to semen collection by the EEJ following three treatments: The control group consisted of no use of anesthesia; in the others, the anesthetic combinations xylazine/ketamine/propofol or butorphanol/ ketamine/propofol were administered. For each group, twelve procedures were conducted for EEJ. Semen was evaluated for volume, color, aspect, motility, sperm concentration, morphology, viability, and functional membrane integrity. The highest efficiency (100% ejaculates) was achieved when the control group was used; the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Semen; Edentate; Xenarthra; Electroejaculation.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352016000601595
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Topography and syntopy of abdominopelvic viscera of the giant anteater (Myrmecophage tridactyla - Linnaeus, 1758) Arq. Bras. Med. Vet. Zootec.
Oliveira,F.R.; Lima,F.R.; Silvino,M.J.; Pereira,L.F.; Dias,F.G.G..
ABSTRACT In 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...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Animal anatomy; Abdominopelvic cavity; Organs; Xenarthra.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352019000601961
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Estudo anatômico do plexo lombossacral de Tamandua tetradactyla Arq. Bras. Med. Vet. Zootec.
Cardoso,J.R.; Souza,P.R.; Cruz,V.S.; Benetti,E.J.; Brito e Silva,M.S.; Moreira,P.C.; Cardoso,A.A.L.; Martins,A.K.; Abreu,T.; Simões,K.; Guimarães,F.R..
O tamanduá-mirim (Tamandua tetradactyla) é um xenartro da família Myrmecophagidae, encontrado da Venezuela ao sul do Brasil. Estudos apontam que essa é uma das espécies de animais selvagens mais vitimadas em número de atropelamentos, e, muitas vezes, o atendimento clínico adequado aos indivíduos feridos é dificultado pela carência de informações acerca dos mesmos. Visando contribuir com o conhecimento dessa espécie, este estudo teve como objetivo descrever seu plexo lombossacral. Para tanto, foram utilizados quatro cadáveres de Tamandua tetradactyla adultos e de ambos os sexos. O plexo lombossacral dessa espécie é formado pelos ramos ventrais dos nervos espinhais T18, L1, L2, L3, S1, S2, S3, S4, S5. Os nervos integrantes do plexo lombossacral do T....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Tamanduá-mirim sistema nervoso inervação do membro pélvico; Xenarthra.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352013000600020
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Synaptonemal complexes and XY behavior in two species of argentinian armadillos: Chaetophractus villosus and Dasypus hybridus (Xenarthra, Dasypodidae) Biocell
Sciurano,R. B.; Merani,M.S.; Bustos,Jimena; Solari,A.J..
Spermatocytes from the two armadillo species, C. villosus and D. hybridus were studied in microspreads for synaptonemal complexes (SCs) and in thin sections for electron microscopy (EM). The complete SC karyotype generally agrees with previous reports on mitotic chromosomes, except for the sex chromosomes. The X chromosome is submetacentric in both species and the Y is the shortest one in C. villosus and the second shortest in D. hybridus, and an extremely acrocentric one. A SC is formed along the total length of the Y chromosome, and this SC persists along all the pachytene substages. A single ecombination nodule (RN) is located in the region of the SC nearest to the attachment to the nuclear envelope. The lateral element (LE) of the X axis in the SC...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Xenarthra; XY chromosomes; Meiosis; Synaptonemal complexes.
Ano: 2006 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-95452006000100009
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New records of the southern naked-tailed armadillo Cabassous unicinctus unicinctus Linnaeus, 1758 (Cingulata: Dasypodidae) in Brazil Biota Neotropica
Anacleto,Teresa Cristina da Silveira; Godoy,Leandro Perez; Tubelis,Darius Pukenis.
The geographic distribution of Cabassous unicinctus is poorly known due to the low number of available records. Two subspecies with distributions limited by the Amazonas River were recognized in 1980. Cabassous u. unicinctus has been found north of this river, while C. u. squamicaudis occurs in areas south of the river. This study aimed to update the distribution records of C. u. unicinctus in Brazil. We compiled records from literature, museum collections and field studies. New records of this subspecies were obtained from the Brazilian states of Acre, Pará, Rondônia and Mato Grosso. These records enlarge a geographic distribution of C. u. unicinctus to Amazonian and Cerrado biomes, regions located south of the Amazon River.
Tipo: Info:eu-repo/semantics/other Palavras-chave: Xenarthra; Geographic distribution; Armadillo; Amazonas; Cerrado; Mato Grosso.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032013000200293
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An update on the physiology of two- and three-toed sloths BJMBR
Gilmore,D.P.; Da-Costa,C.P.; Duarte,D.P.F..
Physiological and pharmacological research undertaken on sloths during the past 30 years is comprehensively reviewed. This includes the numerous studies carried out upon the respiratory and cardiovascular systems, anesthesia, blood chemistry, neuromuscular responses, the brain and spinal cord, vision, sleeping and waking, water balance and kidney function and reproduction. Similarities and differences between the physiology of sloths and that of other mammals are discussed in detail.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Xenarthra; Sloths; Bradypus; Choloepus; Physiology.
Ano: 2000 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2000000200001
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Modelo de suprimento sanguíneo do intestino grosso do tamanduá bandeira (Myrmecophaga tridactyla) Ciência Rural
Souza,Ana Lúcia Rezende de; Rezende,Lorenna Cardoso; Mortoza,Amanda Rocha; Ferreira,Jussara Rocha.
Em seis animais adultos Myrmecophaga tridactyla estudou-se o modelo de suprimento sanguíneo do intestino grosso, que é dependente das artérias mesentérica cranial (AMCr) e caudal (AMC). Os espécimes coletados conforme as normas do IBAMA (Instituto Brasileiro do Meio Ambiente e dos Recursos Naturais Renováveis) foram perfundidos com água (40 C), injetados com látex corado, fixados em formol e conservados em solução alcoólica (50%). O mesocólon está disposto na linha sagital mediana e fixa o intestino grosso à parede dorsal do abdome. Derivaram da AMC: a artéria retal cranial, sete a 14 artérias cólicas e uma ou duas artérias ileocólicas, que apresentaram anastomoses de irrigação com a AMCr. A AMC finaliza-se na borda mesocólica das alças intestinais,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Morfologia; Mesentério; Artérias; Myrmecophaga tridactyla; Xenarthra.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782010000300007
Registros recuperados: 31
Primeira ... 12 ... Última
 

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