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.