This species is only known from extreme southern Nigeria and south-western Cameroon at low altitudes. In Cameroon, it occurs between 100–300 m Asl (M. Hirschfeld pers. comm. July 2016). A previous record of this species from Democratic Republic of Congo, which was not included in the previous 2004 assessment, has now been assigned to Cardioglossa inornata by Hirschfeld et al. (2015).
Habitat and Ecology
This species lives in lowland moist forest and in degraded habitats near more mature forest and can be found in small groups along forest watercourses, often in undergrowth among dead leaves and in holes. It is presumed to breed in streams by larval development, similar to other species in genus.
It is fairly common, though it is often absent from apparently suitable habitat. It is not as common as other Cardioglossa species in the same area (M. Hirschfeld pers. comm. July 2016). Due to ongoing decline in the extent and quality of habitat, the population is suspected to be decreasing.
This species is presumably affected by forest loss due to urbanization, agriculture and logging.
This species occurs in Korup National Park in Nigeria, and in Ebo Forest Reserve in Cameroon (M. Hirschfeld pers. comm. July 2016).
Red List Status
Least Concern (LC)
Listed as Least Concern in view of its relatively wide distribution, tolerance of a degree of habitat modification and presumed large population.
This is a restricted concept of this species following the split of the broader concept into this and Cardioglossa inornata (elevated from subspecies level) (Hirschfeld et al. 2015).
IUCN SSC Amphibian Specialist Group 2017. Cardioglossa nigromaculata. The IUCN Red List of Threatened Species 2017: e.T89186860A49312036. http://dx.doi.org/10.2305/IUCN.UK.2017-2.RLTS.T89186860A49312036.en .Downloaded on 21 January 2019