This species is found in xeric environments of north-western Peru (Departamento Tumbes) and the Gulf of Guayaquil, Ecuador (Guayas and Manabi Provinces). Two subspecies are recognized: C. s. scaphiopeza in Ecuador, and C. s. stolzmanni in Peru. It has an altitudinal range of 0-100m asl.
Habitat and Ecology
The habitat where some individuals have been collected can be described as tropical scrub, which is usually fairly open with a few trees, but remains green for about half the year. Other specimens have been collected in an open and sandy desert, with scattered, low, desert vegetation, and trees that are absent except in or near temporary streambeds (Peters 1967). It lives below ground when not breeding, but is an explosive breeder during good rains (with breeding taking place in water).
It is a very rare species, but has been recorded in the last few years in Ecuador. There is no information on its population status in Peru.
The major threat is habitat loss due to agriculture (especially cattle ranching), logging, and human settlement. Soil pollution, due to agrochemicals, also represents a threat.
It occurs in Parque Nacional Machililla and Reserva Ecológica Manglares Churute in Ecuador, and the Zona Reservada de Tumbes in Peru. Further survey work is needed to determine the population status of this species in Peru.
Ariadne Angulo, Luis A. Coloma, Santiago Ron, Diego Cisneros-Heredia 2004. Ceratophrys stolzmanni. In: IUCN 2014