Bioacoustics of Dorisiana guayabana

Notes. – The triangular shape of the timbal cover is characteristic of members of the genus Dorisiana Metcalf. However , F. guayabana has three segmented tarsi not the two segmented tarsi found in the genus Dorisiana ( Delétang 1919 ) . Fidicinoides guayabana is most similar in general appearance to F. variegata ( Sanborn 2005 ) . The species can be easily separated by the spines found on the costal margin of the tegmina of F. variegata . Fidicinoides guayabana is also distributed along the Cordillera Central of Costa Rica in similar moist forest habitats to F. c o f f e a in the highlands surrounding the Meseta Central region (Young 1977, 1984). The known distribution comes from the type material which includes the specimens used in the studies of Young (1977, 1984). The species has been collected in montane wet (rain) forests during the dry season (March–August) and has been associated with shade trees in coffee and Costa Rican guava plantations ( Young 1984 ). Nymphal exuviae have also been associated with legumes, particularly with Zygia longifolia (Willd.) , Inga fissicalyx Pittier and Inga sp. ( Young 1984 ). The populations are relatively low with an estimate of mean density of about 109 cicadas per year per location ( Young 1984 ). The song of F . guayabana (figs. 24–25), based on an analysis of 18 recorded songs, is a two-part song with a broad band of frequencies comprising an initial steady buzz of 12–22 s duration usually followed by 1– 11 short buzzes of about 0.25 s duration separated by 0.6– 0.75 s. The phrases end abruptly. Peak frequencies among these broad-band songs are 5,906–6,843 Hz. Sometimes no ending short buzzes are produced. Complete songs last from 12–44 s. No satisfactory mnemonic comes to mind for this song, but perhaps zzzzzzzzzzzzzzzzzzht…zht….zht…zht might be useful. This species does produce disturbance squawks readily, but none have been recorded.