01964nas a2200229 4500008004100000022001400041245010600055210006900161260001600230300001100246490000700257520110900264653001701373653002401390653002201414653001901436653002201455653002301477100002201500700002701522856018501549 2010 eng d a1536-244200aSounds, Behaviour, and Auditory Receptors of the Armoured Ground Cricket, Acanthoplus longipes0 aSounds Behaviour and Auditory Receptors of the Armoured Ground C cJan-06-2010 a1 - 150 v103 a

The auditory sensory system of the taxon Hetrodinae has not been studied previously. Males of the African armoured ground cricket, Acanthoplus longipes (Orthoptera: Tettigoniidae: Hetrodinae) produce a calling song that lasts for minutes and consists of verses with two pulses. About three impulses are in the first pulse and about five impulses are in the second pulse. In contrast, the disturbance stridulation consists of verses with about 14 impulses that are not separated in pulses. Furthermore, the inter-impulse intervals of both types of sounds are different, whereas verses have similar durations. This indicates that the neuronal networks for sound generation are not identical. The frequency spectrum peaks at about 15 kHz in both types of sounds, whereas the hearing threshold has the greatest sensitivity between 4 and 10 kHz. The auditory afferents project into the prothoracic ganglion. The foreleg contains about 27 sensory neurons in the crista acustica; the midleg has 18 sensory neurons, and the hindleg has 14. The auditory system is similar to those of other Tettigoniidae.

10acalling song10acourtship behaviour10adisturbance sound10ahearing system10ascolopidial organ10asensory physiology1 aKowalski, Kerstin1 aLakes-Harlan, Reinhard uhttps://academic.oup.com/jinsectscience/article-lookup/doi/10.1673/031.010.5901https://academic.oup.com/jinsectscience/article/843007/Sounds-behaviour-and-auditory-receptors-of-the01883nas a2200205 4500008004100000022001300041245016000054210006900214260001600283300001200299490000800311520117400319653001701493653002201510653001501532653001501547100002201562700002701584856006601611 2011 eng d a0944200600aTemporal patterns of intra- and interspecific acoustic signals differ in two closely related species of Acanthoplus (Orthoptera: Tettigoniidae: Hetrodinae)0 aTemporal patterns of intra and interspecific acoustic signals di cJan-02-2011 a29 - 350 v1143 a

Males of the closely related African tettigoniids Acanthoplus discoidales and Acanthoplus longipes produce a long-lasting calling song and a short disturbance sound. The temporal patterns of the sounds were analysed in respect to species differences and song type differences. The calling songs of both species consist of impulses which are separated into verses of two syllables, with fewer impulses in the first syllable. A. longipes produces more impulses in each syllable than A. discoidales and has longer verse durations, verse intervals and syllable intervals. Also, the disturbance sounds, produced after mechanical stimulation, contain distinct verses of impulses. The disturbance sound of A. longipes has a higher number of impulses per verse than that of A. discoidales. The frequency spectra of the songs in both species have similar peak frequencies (around 12.5 kHz) and both species have their greatest hearing sensitivity in the range between 5 and 10 kHz. Females of A. longipes perform phonotaxis only to songs with a species-specific temporal pattern. By contrast, females of A. discoidales react positively to calling songs of both species.

10acalling song10adisturbance sound10aHetrodinae10aphonotaxis1 aKowalski, Kerstin1 aLakes-Harlan, Reinhard uhttp://linkinghub.elsevier.com/retrieve/pii/S0944200610000905