The aim of the present study was to investigate the sequence of shell bone formation in the embryos of the Pleurodira, Podocnemis unifilis. Their bones and cartilage were collected and cleared before staining. The shell was also examined by obtaining a series of histological slices. All the bony elements of the plastron have independent ossification centers, which subsequently join together and retain two fontanelles until the period of hatching. This turtle has a mesoplastra, which is characteristic of the Podocnemididae. The carapace begins to form concurrently with the ossification of the ribs at the beginning of stage 20. All the plates, except the suprapygal, initiate ossification during the embryonic period. The main purpose of the histological investigation was to highlight the relationship between the formation of the carapace and ribs with that of the neural plates. The costal and neural plates were found not to independent ossification centers, but to be closely related to components of the endoskeleton, originating as expansions of the perichondral collar of the ribs

diferentes tempos. A perda da capacidade de se locomover foi alcançada por todas as jibóias. Em relação à perda da reação postural de endireitamento os cinco exemplares perderam essa capacidade em 15 minutos após aplicação do fármaco, e o retorno deu-se em média aos 176,66 + 45,09 em dois animais e os 295 + 8,66 minutos em três. Não houve variação na freqüência cardíaca entre os animais nos 300 minutos de observação e todos os protocolos foram seguros, uma vez que não ocorreram óbitos. A associação proposta promoveu analgesia, relaxamento muscular e anestesia nas serpentes do gênero Boa.

No abstract

Caiman yacare embryos were collected and subjected to the bone cleared and Alizarin staining to analyze the ontogenic patterns of the skeletal ossification of the pelvic girdle and members. Ossification of C. yacare pelvis begins at 36 days of incubation. The femur, tibia and fibula present simultaneous stain retention at 30 days. It has four tarsal bones, the calcaneus, the talus, distal III and distal IV. Their ossification starts with the calcaneus from the 40th day of incubation, followed by the talus. At 54 days, the distal tarsal IV is conspicuous, as is the outline of the distal III. Each foot has five metatarsi (MT) and 13 phalanges (phalangeal formula 2:3:4:4). Ossification of the metatarsi begins at 36 days and follows the sequence MTI=MTII=MTIII=MTIV>MTV. The first phalanges begin the ossification process on the 36th day and continue up to the last day of incubation. The sequence of ossification of the proximal phalanges is PPI=PPII=PPIII>PPIV, while that of the medial phalanges is MPII> MPpIII>MDpIII>MPpIV>MDpIV and that of the distal phalanges is DPI>DPII>DPIII>DPIV, and the ontogenic pattern of the bones of the pelvic girdle and members of C. yacare differs from that of other reptiles, albeit with a few similarities.

Docentes. 2. Mestrandos. ResumoObjetivou-se estudar a técnica de abordagem cirúrgica da articulação coxofemoral de ouriço-cacheiro (Coendou prehensilis), utilizando quatro exemplares adultos que foram encaminhados ao Laboratório de Ensino e Pesquisa em Animais Silvestres. Uma incisão de pele sobre o trocânter maior do fêmur, ao longo da borda cranial do músculo bíceps femoral, a fim de liberar o músculo tensor da fáscia lata com sua borda no glúteo médio foi a técnica de escolha. As margens cutâneas foram divulsionadas e afastadas. A técnica mostrou-se efetiva para o animal em questão.Palavras-chave: Anatomia, membro pélvico, luxação