Calls of three species of arthroleptid frogs from Rio Muni, Equatorial Guinea

The calls of three anuran species in the family Arthroleptidae in the sub-f amily Astylosterminae from Equatorial Guinea are described including inform ation on calling behaviour. For each species, we present a characteristic a udiospectrogram and oscillogram. We also provide numerical information abou t the spectral and temporal features of the calls. The calls are compared w ith previously published descriptions from other parts of their distributio n. A new tall type is described for Leptodactylodon albiventris.