Ophryophryne elfina sp. n. in situ: A Two syntopically collected males of Ophryophryne gerti (left) and Ophryophryne elfina sp. n. (right) in Chu Yang Sin N.P., Dak Lak Prov., Vietnam, 1750 m a.s.l., photo by N.L. Orlov B calling adult male of Ophryophryne elfina sp. n. in Nui Chua Mt., Nui Chua N.P., Ninh Thuan Prov., Vietnam, 780 m a.s.l., photo by S.N. Nguyen C adult male of Ophryophryne elfina sp. n. in calling position in Hon Ba N.R., Khanh Hoa Prov., Vietnam, 1510 m a.s.l., photo by L.T. Nguyen.