Günther A (1858). Catalogue of the Colubrine Snakes in the Collection of the British Museum. London: Trustees of the British Museum. (Taylor and Francis, printers). xvi + 281 pp. (Hologerrhum, new genus, p.186; H. philippinum, new species, pp.186–187).
_from_650_m_asl,_Mt._Cagua_-_ZooKeys-266-001-g086.jpg)
.jpg){kind=small}