Ptychadena schillukorum


Taxonomy [top]

Kingdom Phylum Class Order Family

Scientific Name: Ptychadena schillukorum
Species Authority: (Werner, 1908)
Common Name(s):
English Schilluk Ridged Frog, Sudan Grassland Frog
Ptychadena cotti (Parker, 1930)
Pychadena floweri (Boulenger, 1917)
Rana schillukorum Werner, 1908
Taxonomic Notes: We follow Perret (1987) and Channing (1993) in considering Ptychadena floweri to be a synonym of P. schillukorum, but note that this opinion is not shared by Poynton and Broadley (1985b). Rödel (2000) considers the matter to be still unresolved. S. Baha El Din (pers. comm.) supports the current arrangement.

Assessment Information [top]

Red List Category & Criteria: Least Concern ver 3.1
Year Published: 2013
Date Assessed: 2013-07-05
Assessor(s): IUCN SSC Amphibian Specialist Group
Reviewer(s): Stuart, S.N.
Contributor(s): Channing, A., Poynton, J., Largen, M.J., Rödel , M.-O. & Baha El Din, S.
Facilitator/Compiler(s): Morris, E.J.
Listed as Least Concern in view of its very wide distribution, its tolerance of a broad range of habitats and its presumed large population.
2009 Least Concern
2004 Least Concern

Geographic Range [top]

Range Description: This species ranges from Senegal, east to southwestern Ethiopia and southern Somalia, south to Malawi, central Mozambique, southeastern Democratic Republic of Congo and western Angola. Although this species is reported from a very wide area in Africa, there are very few records from most of its range, and it has not been recorded from many countries where it is likely to occur. The distribution map is based on the assumption that it occurs in areas between the recorded localities. There are records from Senegal, Ghana, Burkina Faso, Benin, Cameroon, South Sudan, Sudan, Eritrea, Ethiopia, Somalia, Kenya, Tanzania, Malawi, Mozambique, Democratic Republic of Congo and Angola. The populations in northern Eritrea and Egypt (localities in the Nile Delta and at Fayoum) appear to be genuinely isolated. It is presumed to occur in Gambia, Guinea-Bissau, Guinea, Mali, Côte d’Ivoire, Togo, Niger, Nigeria, Central African Republic, Chad, Uganda, and Zambia.
Angola (Angola); Benin; Burkina Faso; Cameroon; Congo, The Democratic Republic of the; Egypt; Eritrea; Ethiopia; Ghana; Kenya; Malawi; Mozambique; Senegal; Somalia; South Sudan; Sudan; Tanzania, United Republic of
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: It is apparently common where it occurs, but it is patchily distributed. It is a rare species in Egypt, where it is currently only known from two specimens (S. Baha El Din pers. comm.).
Population Trend: Unknown

Habitat and Ecology [top]

Habitat and Ecology: It is a savannah species, including in quite arid habitats, and has also been found in grassland, partially flooded rice fields and dry yam fields. It is often seen near rivers and lakes, and it breeds in flooded grasslands, rice fields, and temporary pools. It is known to feed on other frogs and large terrestrial animals (Baha El Din 2005).
Systems: Terrestrial; Freshwater

Use and Trade [top]

Use and Trade:

There are no reports of this species being utilized.

Threats [top]

Major Threat(s): It is an adaptable species that is not facing any significant threats, except in localized situations.

Conservation Actions [top]

Conservation Actions: It occurs in several protected areas.

Bibliography [top]

Amiet, J.-L. 1974. Voix d'Amphibiens camerounais. IV - Raninae: genres Ptychadena, Hildebrantia et Dicroglossus. Ann. Fac. Sci. Cameroon 18: 109-128.

Baha El Din, S. 2005. On the occurrence of Ptychadena schillukorum (WERNER, 1907) in Egypt. Herpetozoa 18(3-4): 177-178.

Channing, A. 1993. A new grass frog from Namibia. S. Afr. J. Zool.: 142-145.

Channing, A. 2001. Amphibians of Central and Southern Africa. Cornell University Press, Ithaca and London.

Channing, A. and Howell, K.M. 2006. Amphibians of East Africa. Edition Chimaira, Frankfurt am Main.

Channing, A., Sinclair, A.R.E., Mduma, S.A.R., Moyer, D. and Kreulen, D.A. 2004. Serengeti amphibians: Distribution and Monitoring baseline. African Journal of Herpetology: 163-181.

Hughes, B. 1988. Herpetology in Ghana (West Africa). British Herpetological Society Bulletin: 29-38.

IUCN. 2013. IUCN Red List of Threatened Species (ver. 2013.2). Available at: (Accessed: 13 November 2013).

Lamotte, M. 1969. Le parc national du Niokolo-Koba, Fasciule III; XXX. Amphibiens (deuxieme note). Mem. Inst. Fond. Afr. Noire: 420-426.

Lanza, B. 1981. A Checklist of the Somali amphibians. Monitore Zoologico Italiano N.S. Supplemento: 151-186.

Lanza, B. 1990. Amphibians and reptiles of the Somali Democratic Republic: checklist and biogeography. Biogeographica: 407-465.

Largen, M.J. 1997. An annotated checklist of the amphibians and reptiles of Eritrea, with keys for their identification. Tropical Zoology: 63-115.

Largen, M.J. 1997. Two new species of Ptychadena Boulenger 1917 (Amphibia, Anura, Ranidae) from Ethiopia, with observations on other members of the genus recorded from this country and a tentative key for their identification. Tropical Zoology 10: 223-246.

Largen, M.J. 2001. Catalogue of the amphibians of Ethiopia, including a key for their identification. Tropical Zoology 14: 307-402.

Lötters, S., Rotich, D., Koester, T.E., Kosuch, J., Muchai, V., Scheelke, K., Schick, S., Teege, P., Wasonga, V.D. and Veith, M. 2004. What do we know about the amphibians from the Kenyan central and western highlands? Salamandra.

Nago, S.G.A., Grell, O., Sinsin, B. and Rödel, M.-O. 2006. The amphibian fauna of Pendjari National Park and surroundings, northern Benin. Salamandra 42(2-3): 93-108.

Perret, J.-L. 1987. A propos de Ptychadena schillukorum (Werner, 1907) (Arura, Randiae). Bulletin de la Societe Neuchateloise des Sciences Naturelles: 63-70.

Pickersgill, M. 2007. Frog Search. Results of Expeditions to Southern and Eastern Africa. Edition Chimaira, Frankfurt am Main.

Poynton, J.C. 1966. Amphibia of northern Mozambique. Memoirs de Instituto de Investigação Científica de Moçambique Ser. A. Ciencas B: 13-34.

Poynton, J.C. 1970. Guide to the Ptychadena (Amphibia:Ranidae) of the southern third of Africa. Annals of the Natal Museum: 365-375.

Poynton, J.C. and Broadley, D.G. 1985. Amphibia Zambesiaca. 2. Ranidae. Annals of the Natal Museum: 115-181.

Poynton, J.C. and Broadley, D.G. 1991. Amphibia Zambesiaca. 5. Zoogeography. Annals of the Natal Museum: 221-277.

Rödel, M.-O. 2000. Herpetofauna of the West Africa. Volume 1. Amphibians of the West African Savannas. Edition Chimaira, Frankfurt am Main.

Rödel, M.-O. and Ernst, R. 2003. The amphibians of Marahoué and Mont Péko National Parks, Ivory Coast. Herpetozoa: 23-39.

Schiøtz, A. 1964. A preliminary list of amphibians collected in Ghana. Videnskabelige Meddelelser fra Dansk Naturhistorisk Forening: 1-17.

Schmidt, K.P. and Inger, R.F. 1959. Amphibians. Exploration du Parc National de l'Upemba: 1-264.

Stevens, R.A. 1974. An annotated checklist of the amphibians and reptiles known to occur in south-eastern Malawi. Arnoldia Rhodesia: 1-22.

Stewart, M.M. 1967. Amphibians of Malawi. State University of New York Press, Albany.

van den Elzen, P. and Kreulen, D.A. 1979. Note on the vocalizations of some amphibians from the Serengeti National park, Tanzania. Bonner Zoologische Beiträege: 385-403.

Citation: IUCN SSC Amphibian Specialist Group 2013. Ptychadena schillukorum. The IUCN Red List of Threatened Species. Version 2015.2. <>. Downloaded on 27 August 2015.
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