RESUMO
Tupinambis merianae is a lizard of the Brazilian fauna and belongs to the Squamata order. Blood cell data are scarce. Blood samples from six specimens of adult T. merianae were used to evaluate some hematological parameters. For structural analysis, 2 ml of blood was collected in the presence of EDTA. Part of the blood was used for preparing blood smears which were submitted to the methods of Leishman, Laür, and toluidine blue, and the cytochemical reactions of periodic acid-Schiff, sirius red, sudan black B, and ortho-toluidine-H2 O2. The remainder was centrifuged and the leukocyte buffy coat was fixed in Karnovsky's fluid for electron microscopy examination. The following blood cells were identified: mature and immature erythrocytes, spherical and elliptical thrombocytes, heterophilic granulocytes, eosinophils and basophils types I and II, lymphocytes, monocytes, and azurophilic cells. The more significant results obtained were: the presence of glycogen in the cytoplasm of the thrombocytes, heterophils, and basophils; the presence of basic polyaminoacid-rich proteins in the granules of heterophils and eosinophils and myeloperoxidase in the granules of the heterophils, eosinophils, and azurophilic cells; and sudanophilic small granules in the heterophils, eosinophils, and azurophilic cells. More detailed morphological aspects of the cells were observed by means of ultrastructural analysis.
