Philodryas nattereriis a snake known popularly as field-runner or board, founded in regions of caatinga and in the Brazilian semiarid region. These snakes have a well-developed Duvernoy gland, connected to a grooved tooth, specialized for toxin inoculation. The work aimed to perform the histological characterization of the Duvernoy gland of the P. nattererisnake. For the study, four pairs of animal glands from ...