The casque-headed tree frog Corythomantis greeningi Boulenger, 1896 (Hylidae) (from Jared et al. 2005). A. Habitus; B. Female in phragmotic posture inside test tube, with head bent and head top exposed to exterior; C. Inside test tube, frontal view, with co-ossification area clearly delimited and arrows pointing to well-delimited posterior region of head.