Poecilimon Poecilimon gerlindae
Stridulatory file: The stridulatory file with the general appearance as in the P. propinquus-group. In the middle section comparatively massive teeth, which are moderately reduced in size towards both ends. The teeth number is the low- est in the P. propinquus-group, with 37 teeth (see HELLER 1988, LEHMANN 1998 for comparison of the other species). This low teeth number corresponds with the low pulse number in the songs (see below). The whole stridulatory file roughly 3 mm long, with 16 teeth per millimetre in the central area. [1]
References
- . Poecilimon gerlindae spec. nov.–a new bushcricket species of the Poecilimon propinquus-group (Orthoptera: Phaneropteridae) from Greece. Articulata. 2006;21(2):109-119.
In all Poecilimon-species only the down stroke of the wings produces a sound, the opening of the wings is sound-less. The original sound pattern in the P. pro- pinquus-group is produced by a single closing movement of the wings, which gives a mono-syllabic verse. The three members of the P. propinquus-group P. veluchianus, P. zimmeri and P. thessalicus produce a calling song consisting of single syllables separated by intervals of about one to three seconds. This type of song represents the ancestral song pattern within the P. propinquus group (LEHMANN 1998). In P. gerlindae spec. nov. exists a tendency to repeat the mono-syllabic verses quite continuously over minutes (Figure 9 top), with in mean 2.5-5.5 syllables per second, a character shared with P. propinquus. The verses are short, around 25-70 ms long at 18-24 °C (Figure 9 bottom) and the pauses between the verses are longer than the verses themselves. Each syllable contains 8-10 pulses, the first 1-3 separated from the rest. The pulse number is distinctly greater in P. propinquus with in mean 10-15 pulses per verse. Corre- spondingly, the syllables were longer in P. propinquus (40-140 ms at 18-24 °C). After compensating for temperature effects, these differences were statistically significant (bioacoustic data from 15 males (n=962 syllables) of P. gerlindae and 16 (n=829) of P. propinquus). Like the other species of the P. propinquus-group, P. gerlindae spec. nov. sings only at night. However, due to the high syllable repetition rate P. gerlindae spec. nov. produces much more syllables per night (about 60000) than the mono-syllabic singing P. veluchianus and P. zimmeri (less than 10000; HELLER & HELVERSEN 1993 as P. propinquus) or the poly- syllabic species P. mariannae (less than 20000; LEHMANN & LEHMANN 2006). [1]
References
- . Poecilimon gerlindae spec. nov.–a new bushcricket species of the Poecilimon propinquus-group (Orthoptera: Phaneropteridae) from Greece. Articulata. 2006;21(2):109-119.