AMPHIBIAWEB
Ptychadena porosissima
Grassland ridged frog
family: Ptychadenidae

© 2016 Dr. Joachim Nerz (1 of 6)
Conservation Status (definitions)
IUCN (Red List) Status Least Concern (LC)
CITES
Other International Status None
National Status None
Regional Status None

Country distribution from AmphibiaWeb's database: Angola, Congo, the Democratic Republic of the, Ethiopia, Kenya, Malawi, Mozambique, Rwanda, South Africa, Swaziland, Tanzania, United Republic of, Uganda, Zambia, Zimbabwe

 

View distribution map using BerkeleyMapper.

   

From the Encyclopedia of Life account:

Distribution

P. porosissima is distributed from Ethiopia, southern Zaire and Angola, southward throughout East Africa to Zambia, Zimbabwe and southern Mozambique (Stewart 1967; Poynton and Broadley 1985; Channing 2001). This species are also found in South Africa, Lesotho, and Swaziland (Text from Minter et al., 2004, © SI/MAB Biodiversity Program).


Authors: Minter, L.R.; Passmore, N.I.
License: http://creativecommons.org/licenses/by-nc/3.0/

Habitat and Ecology

P. porosissima has adapted to a wider range of habitats than the other Ptychadena species in the atlas region: from the sub-tropical coastal environment of KwaZulu- Natal, to temperate grassland along the crest of the great escarpment and the highveld and, occasionally, wooded grassland (Passmore 1978; Jacobsen 1989). Stewart (1967) recorded that the species is also widely distributed at high elevations in Malawi and other parts of Africa (Text from Minter et al., 2004, © SI/MAB Biodiversity Program).


Authors: Minter, L.R.; Passmore, N.I.
License: http://creativecommons.org/licenses/by-nc/3.0/

Associations

Adults feed opportunistically on terrestrial arthropods (Inger and Marx 1961), and Channing (2001) found prey to include earthworms, snails and other frogs (Text from Minter et al., 2004, © SI/MAB Biodiversity Program).


Authors: Minter, L.R.; Passmore, N.I.
License: http://creativecommons.org/licenses/by-nc/3.0/

Advertisement Call

Males usually call from concealed positions amongst emergent vegetation within the water, supporting themselves on emergent plants, with the hind third of their bodies submerged (Passmore 1978). Calling peaks between 23:00 and 02:30, at which time temperatures are usually substantially lower; this may represent a preadaptation that has allowed this species to invade temperate habitats (Text from Minter et al., 2004, © SI/MAB Biodiversity Program).


Authors: Minter, L.R.; Passmore, N.I.
License: http://creativecommons.org/licenses/by-nc/3.0/

Reproduction

The breeding habitat includes vleis, inundated grassland and sedge pans (Text from Minter et al., 2004, © SI/MAB Biodiversity Program).


Authors: Minter, L.R.; Passmore, N.I.
License: http://creativecommons.org/licenses/by-nc/3.0/

IUCN Red List Category and Justification of Conservation Status

Jacobsen (1989) reported that although P. porosissima is widespread and occurs in a few protected areas, its distribution is patchy and its conservation status is uncertain. Surveys of populations in conservation areas are needed (Text from Minter et al., 2004, © SI/MAB Biodiversity Program).


Authors: Minter, L.R.; Passmore, N.I.
License: http://creativecommons.org/licenses/by-nc/3.0/