Tamandua tetradactyla, Xenarthra, é uma espécie nativa da América do Sul que, devido aos poucos estudos acerca de sua biologia, ainda apresenta vários aspectos desconhecidos em sua morfologia. Tendo em vista a importância de dados morfológicos para diversos estudos, objetivou-se elucidar a ramificação da aorta abdominal dessa espécie para subsidiar a realização de futuros estudos. Para tal, foram utilizados quatro espécimes, sendo dois machos e duas fêmeas, todos jovens, provenientes da área de Mina Bauxita-Paragominas-PA, doados após morte por atropelamento ao Laboratório de Pesquisa Morfológica Animal (LaPMA) da Universidade Federal Rural da Amazônia (UFRA). O sistema arterial foi preenchido com látex contrastado e os animais fixados com solução de formol (10%), sendo posteriormente dissecado, para evidenciar a aorta abdominal e seus ramos colaterais. Os ramos parietais eram constituídos por um par de artérias frênicas caudais, dois pares de artérias intercostais e três pares de artérias lombares. Dentre os ramos viscerais, destacaram-se: artéria celíaca; artéria mesentérica cranial; artérias adrenais; artérias renais; artéria mesentérica caudal; e artérias ilíacas externas, internas e sacral mediana, que se formaram a partir da porção final da aorta abdominal. As artérias testiculares e ováricas tiveram origem nas artérias renais, divergindo daquilo descrito em diversas espécies.

Aceito para publicação em 12/03/2014 Resumo O Eira barbara é um mustelídeo de ampla distribuição na América latina vulgarmente conhecido como Papa-mel. Tendo em vista a carência de informações a respeito da anatomia dos mustelídeos, assim como a importância de um modelo vascular para a compreensão das lesões neurológicas no sistema nervoso central, este trabalho objetivou descrever a morfologia e a composição do circuito arterial da base do encéfalo do E. barbara fornecendo dados para estudos futuros. Para tal utilizou-se dois espécimes, machos, jovens, provenientes, da área de Mina Bauxita Paragominas-PA, doados após morte ao LaPMA. Os espécimes tiveram o sistema arterial preenchido com látex Neoprene 650 corado em vermelho e foram fixados em formaldeído 10% sendo posteriormente dissecados para sistematização dos vasos. Os animais estudados apresentaram o circuito arterial da base do encéfalo suprido pelas artérias carótidas internas e artéria basilar. A artéria carótida interna, após atravessar a dura-máter, continuou cranialmente emitindo as artérias cerebrais médias e terminando como artérias cerebrais craniais que se anastomosam fechando rostralmente o circuito arterial. As artérias comunicantes caudais integraram a artéria basilar ao circulo arterial e emitiram as artérias cerebrais caudais e cerebelares rostrais. A artéria basilar revelou como principais ramos, as artérias cerebelares médias e caudais.

Background: Schistosomus reflexus (SR) is a congenital anomaly, that the animal presents exposed abdominal and thoracic organs. The alterations includes limbs malformation, abnormal spinal column, liver and diaphragm hypoplasia, genitourinary and gastrointestinal changes, on this way, the fetus can not survive. The aim of this study was to report the first SR case in dog and cat in Brazil, and describe anatomical, pathological and radiographic changes.Case: The puppy had ventral midline defect in the abdominal and thoracic wall extending from the sternum to the pubis with viscera exposition, including the heart, lung, liver, stomach, intestine, spleen, kidneys, moreover right army was abnormal, however no spinal column was present. It was performed radiography to evaluate bone abnormalities, and was diagnosed agenesis of carpal, metacarpal and phalange bones. The kitten had ventral midline defect measuring 4 x 2 cm, in the abdominal wall and exposition of liver, stomach, intestine and spleen, as well as tibiotarsal joint arthrogryposis on both lags. It was performed fetus radiography and no spinal column change was diagnosed.Discussion: Schistosomus reflexus is a congenital abnormality common in ruminants. Although it was few reported in dogs and cats. The two cases in this study are the firsts reposts in Brazil in these especies. In our case, the dog had exposition of abdominal and thoracic organs and died one hour after born, similar to this, another author reported a case where the thoracic and abdominal evisceration and the puppy died ten minutes after born. However, in another case with abdominal evisceration only, the puppy survived for eight days. Probably it happened because respiratore function was not compromised. The kitten had abdominal opening only, in turn, other authors reported a case whose abdominal viscera exposition was by pelvic fissure, and another case, what presented thoracic and abdominal evisceration, like our dog case. Some authors affirm that this defect causes fetal dystocia on ruminants, because of the vertebral column abnormality, what promote passage difficult at born moment. On the other hand, dogs did not present these kind of changes and dystocia was not related to this pathology on cases in dogs and cats, however most of these authors performed cesarean because the female did not get normal born. As well as, on two cases in kitten were reported vertebral column abnormalities, what can be related to dystocia. Even no animal of our study present any vertebral column abnormality, other bone changes were found, like carpal, metacarpal and phalange agenesis on army of the dog and tibiotarsal joint arthrogryposis on both lags of the cat fetus. The others report in dogs did not found vertebral column or bone changes, but in cats it was observed vertebral column abnormalities and other changes, like arthrogryposis on four limbs, skull flattening, mandibular brachignathism, reduced ossification of the cranial vault bones, palatoschisis and unfused eyelids. SR etiology is not clearly known, it may be related with genetic, mechanic, endocrine, metabolic, nutrition and infectious factors. The moment of embryonic development, where these factors influence the changes is related with abnormality grade. Although, Chromosomic abnormalities, like chromatid and chromosome breaks, non-homologous pairing of chromosomes was shown. In this study the bitch did not present any metabolic, endocrine or nutritional change, on other hand the queen was submitted to exogenous hormonal treatment to avoid pregnancy, what may be related to SR development. SR is a rare abnormality in dog and cat, fetus radiographic, anatomical and pathological findings confirmed to being this congenital defect, and this are the first reports in Brazil in these species.

The sertolioma is one of the tumors that most affect older dogs, more incidents in criptorquidas animals. Usually these tumors are extremely expansive and can compress and destroy adjacent tissues. For their identification is necessary to carry out histopathological examination. This study aimed to report the occurrence of gonadopatia right criptorquidica, accompanied by neoplastic process associated in a dog of 10 years old. After orchiectomy the testes were sent to the Animal Pathology Laboratory of the Federal Rural University of Amazonia, and histopathological analysis the material was processed routinely for paraffin embedding and staining with hematoxylin -eosin (HE) and Masson's Gomory. Histologically, there was albugíneo by thickening of connective tissue proliferation. In the testicular parenchyma the tubules had only Sertoli cells were decreased in number and spaced proliferated dense connective tissue. The neoplastic process was located in a more central and, morphologically, it was observed in the tubular configuration, cell showing cytoplasmic vacuolization and some places featuring in palisades, characteristic morphological aspects of sertolioma.

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