Contributions to the herpetofauna of the Angolan Okavango- Cuando-Zambezi river drainages. Part 3: Amphibians Author Conradie, Werner National Geographic Okavango Wilderness Project, Wild Bird Trust, SOUTH AFRICA & Department of Nature Conservation Management, Natural Resource Science and Management Cluster, Faculty of Science, George Campus, Nelson Mandela University, George, SOUTH AFRICA & Port Elizabeth Museum, Beach Road, Humewood, Port Elizabeth 6013, SOUTH AFRICA Author Keates, Chad South African Institute for Aquatic Biodiversity (SAIAB), Makhanda, SOUTH AFRICA & National Geographic Okavango Wilderness Project, Wild Bird Trust, SOUTH AFRICA & Department of Nature Conservation Management, Natural Resource Science and Management Cluster, Faculty of Science, George Campus, Nelson Mandela University, George, SOUTH AFRICA Author Verburgt, Luke Department of Zoology and Entomology, University of Pretoria, Pretoria, 0001, SOUTH AFRICA & Enviro-Insight CC, Unit 8 Oppidraai Office Park, Pretoria 0050, SOUTH AFRICA & National Geographic Okavango Wilderness Project, Wild Bird Trust, SOUTH AFRICA Author Baptista, Ninda L. Museum für Naturkunde-Leibniz Institute for Evolution and Biodiversity Science, Invalidenstr. 43, 10115 Berlin, GERMANY & BIOPOLIS Program in Genomics, Biodiversity and Land Planning, CIBIO, Campus de Vairão, 4485 - 661 Vairão, PORTUGAL & Departamento de Biologia, Faculdade de Ciências, Universidade do Porto, 4169 - 007, Porto, PORTUGAL & CIBIO / InBio, Centro de Investigação em Biodiversidade e Recursos Genéticos, Laboratório Associado, Universidade do Porto, Campus Agrário de Vairão, Rua Padre Armando Quintas, 4485 - 661 Vairão, PORTUGAL & Instituto Superior de Ciências da Educação da Huíla (ISCED), Rua Sarmento Rodrigues, Lubango, ANGOLA & National Geographic Okavango Wilderness Project, Wild Bird Trust, SOUTH AFRICA Author Harvey, James Harvey Ecological, 41 Devonshire Avenue, Howick, 3290, SOUTH AFRICA & National Geographic Okavango Wilderness Project, Wild Bird Trust, SOUTH AFRICA text Amphibian & Reptile Conservation 2023 e 325 2023-08-04 17 1 19 56 journal article 297340 10.5281/zenodo.12761936 5e6c8fd8-74a8-4de2-8687-29b4ea71fac1 1525-9153 12761936 Ptychadena grandisonae Laurent, 1954 Many-ridged Grass Frog ( Fig. 30 ; Map 27 ) Material ( 3 specimens ): PEM A12696 , INBAC : WC-5185, Chicala Choloanga roadside quarry, -12.63611° 16.04282°, 1,858 m asl ; PEM A12689 , Cubango River launch site, -12.61700° 16.22133°, 1,727 m asl . Description: Medium sized Ptychadena ; narrow body; ridges present on thigh; two and a half phalanges of the longest toe free of webbing. Dorsum light brown, with darker brown blotches; back of thighs with pale stripes; yellow infusion in groin. Only adult male measured 36.2 mm ( PEM A12689 ). Habitat and natural history notes: This species was only encountered along the Cubango River in flooded grassland. Comments: The identification was based on the key provided by Poynton and Broadley (1985b) and needs genetic verification .