{"data":[{"source":"bio.acousti.ca","id":"50696","topic":"behaviour","value":"All three recorded species produced songs containing the same two types of elements, A and B (Figs 3, 4). The simplest verse structure is found in A. hanangensis sp. nov., where almost invariably one A element and one B element were combined. These AB verses were repeated at intervals of 12.5 \u00b1 3 s (N= 10; 18 \u00b0C, estimate). Only once was an isolated element A recorded. Element A consisted of seven groups of impulses, with the last group being by far the loudest, and element B consisted of five or six single impulses or impulse groups, with the first of each group being by far the loudest (Fig. 3).\n\n...\n\nProbable mechanism of sound production\n\nAs can be recognized from the description (see also Figs 3, 4), the song has a fairly complicated structure that cannot easily be related to any pattern of stridulatory movement. However, the stridulatory file and song have some similarity to that of Acrometopa species (Heller, 1988). In these species the first part of a verse is produced by stridulatory movements using the distal part of the file only, whereas the end of the verse is produced by contact of the scraper with the large, proximal teeth (Heller, 1988: fig. 21\u20132). Assuming a similar sound production mechanism, possibly element A of Altihoratosphaga is produced by a fixed pattern of several opening and closing movements using the distal part of the file only, whereas the B elements may result from scraper\u2013file contacts in the proximal part. [In this way complete syllables would never be produced, or would only be produced once per verse; instead, what may be called dista-syllables (different types) and proxi-syllables (one type) are sounded.]","topic_link":"http:\/\/rs.tdwg.org\/ontology\/voc\/SPMInfoItems#Behaviour","info_url":"https:\/\/bio.acousti.ca\/node\/50696"}]}