The Indonesian island arboreals, black and violet giants from Sangihe and its neighbours, and a genus whose boundaries with Omothymus and Phormingochilus have moved enough that its listings live under three names.
Old world arboreal in full: extremely fast, downward-bolting, venom treated as significant across the cluster, sealed-room rehousing, vertical cork, airflow. These are experienced-keeper animals without qualification.
Island endemism defines supply: single small islands hold the wild populations, historic exports seeded thin captive loops, and production cannot widen its own base. The genus shuffle fragments those thin listings further, which makes the cross-genus search mandatory and makes this page mostly a map to it.