Cacosternum platys Rose, 1950, Rep. Amph. S. Afr.: 74. Types: Not designated or known to exist. Type locality: "wide distribution on the [Cape] and occur on some low-lying parts of the Peninsula, but from high ground they appear to be entirely absent", Cape Province, Rep. South Africa.
Smooth Dainty Frog (Channing, 2001, Amph. Cent. S. Afr.: 292).
Flat Caco (Du Preez and Carruthers, 2009, Compl. Guide Frogs S. Afr.: 376).
Winter rainfall region of the Western Cape Province, Rep. South Africa, in flooded grassland and seepages at all altitudes.
Removed from the synonymy of Cacosternum boettgeri by Channing, 2001, Amph. Cent. S. Afr.: 292, where it had been placed by Poynton, 1964, Ann. Natal Mus., 17: 146. Channing, Brun, Burger, Febvre, and Moyer, 2005, Afr. J. Herpetol., 54: 145, noted that this species is only critically distinguishable from Cacosternum boettgeri by call. Pickersgill, 2007, Frog Search: 286-290, provided an account and discussed the ambiguity of application of the name. See also account by Du Preez and Carruthers, 2009, Compl. Guide Frogs S. Afr.: 376-377. Pyron and Wiens, 2011, Mol. Phylogenet. Evol., 61: 543-583, in their study of Genbank sequences, suggested that Cacosternum platys is the sister taxon of Microbatrachella.
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