Cd

Chrysopa oculata Chrysoperla rufilabris C. harrisii C. downesi ' downesi-west' C. johnsoni C. plorabunda C. adamsi C. nipponensis ' downesi-Kyrgyzstan' ' adamsi-Kyrgyzstan'

C. carnea C. lucasina C. pallida

' carnea-Kyrgyzstan' Cc5 'generator' C. agilis

C. mediterranea

12 s

FIGURE 10.3 Twelve-second oscillographs of the tremulation songs of 15 song species of the Chrysoperla carnea group, two species from the closely related pudica group and one species from the more distant genus Chrysopa. Arrows indicate where the partner would insert its signal during a heterosexual duet.

12 s

FIGURE 10.3 Twelve-second oscillographs of the tremulation songs of 15 song species of the Chrysoperla carnea group, two species from the closely related pudica group and one species from the more distant genus Chrysopa. Arrows indicate where the partner would insert its signal during a heterosexual duet.

FIGURE 10.4 Tremulation song of Chrysoperla downesi, a species having a long, multivolley courtship signal. The oscillograph at the bottom of the figure shows a single SRU, which is exchanged in alternating fashion with the SRU of the duetting partner. The box contains a 2-sec detail of part of the SRU, showing the temporal and frequency structure of the two distinct volley types.

FIGURE 10.4 Tremulation song of Chrysoperla downesi, a species having a long, multivolley courtship signal. The oscillograph at the bottom of the figure shows a single SRU, which is exchanged in alternating fashion with the SRU of the duetting partner. The box contains a 2-sec detail of part of the SRU, showing the temporal and frequency structure of the two distinct volley types.

Once cryptic species have been properly delimited by songs, subtle morphological and ecological differences among them usually become apparent (Henry et al., 2001, 2002a). Eventually, identification of such species will be possible using more traditional taxonomic tools.

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