FIGURE 9 in A new species of nurse-frog (Aromobatidae, Allobates) from the Madeira River basin with a small geographic range

FIGURE 9. Waveforms (upper graphs) and sonograms (lower graphs) of advertisement calls of Allobates bacurau and three cryptically colored Allobates distributed in forests on the east bank of the middle and lower course of the Madeira River, Amazonas State, Brazil. In comparison with advertisement calls of A. bacurau, A. grillisimilis emits shorter (<0.5 s long) note trills; emission of notes by A. caeruleodactylus is continuous (i.e. notes are not arranged in discrete trills) and silent intervals between notes are longer than the ones in the calls of A. bacurau; A. masniger also emits notes continuously, but at a lower frequency bandwidth. Calls of A. grillisimilis, A. caeruleodactylus and A. masniger recorded in 2008 in Borba (04°26'03" S, 59°37'25" W), north of Manicoré.