in taxon results in development of gland development anatomical structure development Harderian gland development Note that the Harderian gland is found in all terrestrial vertebrate groups, including amphibia, reptiles, birds, and mammals. However, it appears to be absent in certain mammals such as bats, cows, horses, and higher primates. Though largely absent in the adult human, it is present in the fetal and neonatal stages. Tetrapoda Harderian gland