Account
What the sources say about this taxon, as written.
description · 
Plazi
Diagnostic description.— General characteristics as described above; mesopterous, with tegmina surpassing apex of abdomen but not reaching apices of hind femora ( Fig. 3 A). Stridulatory file of male 1.62 mm long, with 68 primary teeth (see Fig. 41 A-B), maximum width of file 72.9 μm; teeth of file thick, peg-like, more densely arranged at ends of file than in its middle portion. Left (upper) mirror of stridulatory apparatus as in Fig. 3 C, about as long as eye diameter. Fastigium of 1.2 times wider than scapus. Ventral edges of hind femur unarmed. Male cercus as in Fig. 41 C; ovipositor distinctly shorter than hind femur (ratio ovipositor/hind femur 0.6-0.7), weakly upcurved ( Fig. 3 F). Coloration.— Coloration light green; dorsum of head and pronotum with wide, dark band border with thin, yellow stripes ( Fig. 3 C). Abdomen yellow dorsally, male cerci dark yellow, with reddish tips. Measurements (mm).— Measurements ( 4 males , 5 females ). — body with wings: male 22.6-24.4, female 23- 23.1; pronotum: male 4.9-5.1, female 5-5.4; tegmen: male 16.5-17.3, female 15-16; hind femur: male 18.7-19, female 18.7-18.7; ovipositor: female 11.1-12.4. Bioacoustics.— The call of O. fraternum consists of regular series of short buzzes, each lasting 0.49- 0.77 s (at 28°C) and separated by 0.6- 0.77 s of silence ( Fig. 51 E-F). Each buzz has two pulse train groups. The first group consists of 6-7 pulse trains produced at a slow rate (24.5-28.5/s), with trains separated by 7-14 ms (avrg. 11.26±2.4, n=19) of silence. The second, faster (47-48.2/s) and longer group consists of 11-25 train groups separated by only 1-3 ms (avrg. 1.8±0.5, n=18) of silence. Individual train groups are of similar length in both the slow and fast pulse train groups, and last 19-26 ms (avrg. 21±2.3, n=17). The call is low Q, with most energy apparently allocated between 9 and 16 kHz.