Light micrograph of the integument of O. angrensis: (14) Dorsal region (AB-staining); (15) Ventrolateral region (HE-staining), inset (Mallory´s trichrome staining); (16) Ventral region (HE-staining); (17) Ventral region (AB-method). The melanophores (_) are numerous and located just beneath of the epidermis as well as around de glandular secretory units. They occur also in the hypodermis, but absent in the ventral integument. Iridophores (→) occur in the spongious dermis of the dorsal region just beneath the epidermis. No iridophore is visualized in the ventral region of the integument. Clusters of apocrine glands (¬) with heterogeneous intake predominate at ventrolateral integument; inset of Fig. 15: Observe the granular content with dense stained core () intermingled with cytoplasm material (*). The EK-layer () is continuous in the ventral region, but discontinuous in the ventral integument. Serous glands (Ø) occur in all body regions. Note blood vessels (Æ) in the spongious dermis. CD = compact dermis.