The marsupial brushtail possum (Trichosurus vulpecula) possess a glandular area of skin
over its sternum known as the\sternal gland\". This region of the integument is composed of
two layers: a superficial layer of holocrine sebaceous tissue and a deeper layer of
sudoriferous apocrine tissue. Secretions produced by the glandular tissue are rubbed on
objects by the possum as a form of scent mark. The secretions are visible as an orange to
brown coloured stain on the fur covering the sternum. The structure is found in both males …