Acanthoplus longipes (Charpentier, 1843)

References: Conti & Viglianisi 2005, Kowalski & Lakes-Harlan 2011, Kowalski & Lakes-Harlan 2013

Bioacoustics. Acanthoplus longipes and A. discoidalis possess stridulatory files with unusually few teeth (fewer only in Anepisceptus horridus) and quite large intervals between the teeth. Their calling songs look relatively complicated because they consist of two groups of impulses which are repeated again and again resulting in a trilllike structure (Fig. 7; based on data and figures taken from literature). In our interpretation, both groups together should be considered as one syllable produced during one closing movement with a short break in the middle (e.g., in Leptophyes lisae; Heller 1988). This idea is supported by the observation that in the first group the impulses are typically increasing in amplitude and in the second decreasing (Fig. 7; not the case only in 7C). Both species differ distinctly in the syllable repetition rate with A. longipes singing faster than A. discoidalis . The differences in SRR between the two recordings of A. discoidalis (Conti & Viglianisi 2005, Kowalski & Lakes-Harlan 2013) result very probably from the different temperatures during recording. A. longipes females made phonotaxis mainly to the species-specific song pattern, while A. discoidalis females were attracted to a wider spectrum of song models (Kowalski & Lakes-Harlan 2011).