01797nas a2200169 4500008004100000245013000041210006900171520111900240653001701359653002201376653001801398653001801416653001701434100001801451700002201469856013601491 2020 eng d00aThe call of the squeak beetle: bioacoustics of Hygrobia hermanni (Fabricius, 1775) revisited (Coleoptera: Hygrobiidae)0 acall of the squeak beetle bioacoustics of iHygrobia hermannii Fa3 a

Hygrobiidae, or squeak beetles, originated in the Triassic-Jurassic and exhibit a relictual distribution in the Palaearctic, Oriental and Australasian regions. Hygrobiids are well known for their sound-producing abilities, although studies of their bioacoustics remain limited. Here we describe sound producing organs and bioacoustics of the Palaearctic Hygrobia hermanni (Fabricius, 1775). Plectra and pars stridens were examined in both sexes, and sound characteristics analysed. Despite small differences between male and female last abdominal ventrites, plectra were identical. Pars stridens, however, differed subtly, tooth ridges being wider in females. Calls of both sexes were harmonic, with peak frequency at 6.1 kHz, and secondary peak at 10.9 kHz; males exhibiting longer inter-chirp intervals. Calls changed with time in the laboratory, this possibly condition-related effect being more apparent in males. The differences found between sexes suggest that sound production in squeak beetles may function in intraspecific communication, in addition to being an antipredator device.

10abioacoustics10aHygrobia hermanni10apars stridens10asqueak beetle10astridulation1 aBlair, Jordan1 aBilton, David, T. uhttps://www.tandfonline.com/doi/full/10.1080/01650424.2020.1726963https://www.tandfonline.com/doi/pdf/10.1080/01650424.2020.172696302181nas a2200217 4500008004100000245016400041210006900205520132700274653001701601653001701618653004001635653002001675653001801695653001301713100001701726700002001743700001901763700002101782700002401803856013601827 2020 eng d00aDung beetle distress signals may be correlated with sex and male morph: a case study on Copris lunaris (Coleoptera: Scarabaeidae, Coprini)0 aDung beetle distress signals may be correlated with sex and male3 a

Insect sounds are predominantly produced by stridulations, where specialised body parts contact repeatedly to induce acoustic pulse trains. We studied the stridulatory organ and sound emissions in Copris lunaris, by focussing separately on females, and on major and minor males. Results highlighted an isometric growth of pars stridens in response to body size, and identified a wing-pygidium locking structure that assists sound emission. Sex-specific acoustic differences of some degree were detected between major males and females, as sounds emitted by majors showed higher frequencies and shorter pulses with elevated impulse rates. This cannot be immediately explained by size differences in the components of stridulatory apparatus. Rather, divergence might be an indicator of some underlying behavioural difference in response to distressing events. In minor males, acoustic properties overlapped with both females and major males, although incomplete stridulations had a lower ratio in minor than major males. This paper provides the very first perspective of the potential role of sex and male polymorphism on sound production. However, future categorisations of sounds coupled to behavioural observations of specific interactions are needed to reveal the function of sex and morph-specific differences.

10abioacoustics10adung beetles10aelytro-abdominal stridulatory organ10amale dimorphism10apars stridens10aplectrum1 aKerman, Kaan1 aRoggero, Angela1 aPiccini, Irene1 aRolando, Antonio1 aPalestrini, Claudia uhttps://www.tandfonline.com/doi/full/10.1080/09524622.2019.1710255https://www.tandfonline.com/doi/pdf/10.1080/09524622.2019.171025502582nas a2200277 4500008004100000245015000041210007100191520165200262653002301914653001601937653001501953653001801968653002501986653001902011653002302030653001902053653001802072653001302090653003202103653002202135100002402157700001802181700002202199700002102221856006202242 2019 eng d00aAnatomy of the stridulation apparatus of the beech leaf‐mining weevil and characterization of, and behavioral responses to, stridulation sounds0 aAnatomy of the stridulation apparatus of the beech leaf‐mining w3 a

We investigated auditory signals and morphology of the stridulatory apparatus of the European beech leaf‐mining weevil, Orchestes fagi L. (Coleoptera: Curculionidae), an invasive herbivore now established in Nova Scotia, Canada, to determine their potential for enhancing survey tools to monitor the spread of the species in Canada. We recorded and described sounds produced by adult O. fagi, analyzed the morphology of the stridulatory mechanism for intersexual differences and asymmetry, and examined behavioral responses elicited in conspecifics by playback of stridulation recordings. Adult O. fagi produced sounds under three conditions: male in distress, female in distress, and male in the presence of female. Female distress chirps lasted significantly longer than male distress chirps and male chirps in the presence of females, but peak frequencies and mean number of chirps per s did not differ significantly among the three groups. Morphology of the stridulation structures in male and female O. fagi was compared using scanning electron microscopy. Orchestes fagi have an elytro‐tergal file‐ and scraper‐type sound production apparatus, through which sound is produced upon anterior motion of the abdomen. Female O. fagi have a ‘pars stridens’ that is longer and has more ridges than males. Width and number of ridges per length of pars stridens did not differ between the sexes. Evidence of asymmetry was found in male pars stridens, with the right side being longer than the left. Playback of recorded sounds to adult weevils suggests female O. fagi were repelled by sounds produced by distressed males.

10aauditory recording10abeechweevil10aColeoptera10aCurculionidae10adistressstridulation10ainsectbehavior10ainsectbioacoustics10aOrchestes fagi10apars stridens10aplayback10ascanningelectron microscopy10asexual dimorphism1 aGoodwin, Joel, T.L.1 aHillier, Kirk1 aRoscoe, Lucas, E.1 aSweeney, Jon, D. uhttps://onlinelibrary.wiley.com/doi/abs/10.1111/eea.1284401830nas a2200241 4500008004100000245014800041210006900189260001600258300001400274490000700288520098700295653001701282653001501299653001801314653001301332100002201345700001701367700002801384700002601412700002401438700002801462856009801490 2007 eng d00aStridulatory file and calling song of two populations of the tropical bush cricket Eneoptera surinamensis (Orthoptera, Gryllidae, Eneopterinae)0 aStridulatory file and calling song of two populations of the tro cJan-12-2007 a461 - 4650 v973 a

This study characterizes the calling song and ultramorphology of the stridulatory file of two geographically isolated populations of the tropical bush cricket Eneoptera surinamensis (De Geer, 1773) from city of Foz do Iguaçu, state of Paraná, and town of Rio Claro, state of São Paulo, Brazil, distant 1,000 Km from each other. The teeth are shell-shaped, the larger ones are dis tributed in the medium region of the file, decreasing gradually in size towards the edges. Specimens from Foz do Iguaçu have a file with 82 ± 9.8 teeth, length=1.89 mm ± 0.15 with 43.76 ± 5.94 teeth per mm (n=15). Specimens from Rio Claro present a file with 87 ± 9.81, length=1.9 6 ± 0.19 mm with 44.52 ± 4.61 teeth per mm (n=15). Statistical differences found between the two populations are not significant. The calling song is an uninterrupted trill that alternates two sets of notes distinct for its temporal features.

10abioacoustics10aGrylloidea10apars stridens10asonogram1 aMiyoshi, Akio, R.1 aZefa, Edison1 aMartins, Luciano, de P.1 aDias, Pedro, G. B. S.1 aDrehmer, César, J.1 aDornelles, José, E. F. uhttp://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212007000400016&lng=en&tlng=en01514nas a2200217 4500008004100000245017200041210006900213260001600282300001200298490000700310520079700317653001701114653001101131653001201142653001401154653001201168653001801180100002801198700001701226856005301243 2011 eng d00aContribution to the taxonomy of Gryllus Linnaeus, 1758 in South America: Part I: Redescription of Gryllus argentinus Saussure, 1874 (Orthoptera, Grylloidea, Gryllidae)0 aContribution to the taxonomy of Gryllus Linnaeus 1758 in South A cJan-01-2011 a87 - 930 v143 a

The genus Gryllus includes 82 described species that occur in America from Canada to Argentina as well as in several areas of Africa, Europe and Asia. There are 12 species in South America, which were described in the nineteenth century based on a small number of samples and inconsistent characters such as body coloration and external morphology. The aim of this article is to redescribe Gryllus argentinus Saussure, 1874 collected in the urban areas of Pelotas, Capão do Leão and Rio Grande, in the state of Rio Grande do Sul, southern Brazil, highlighting phallic sclerites, calling song and body morphometry. We designate the lectotype male, provide a combination of diagnostic characteristics and discuss the taxonomic situation of South American Gryllus species.

10abioacoustics10aBrazil10acricket10agenitalia10ainsects10apars stridens1 aMartins, Luciano, de P.1 aZefa, Edison uhttp://doi.wiley.com/10.1111/ens.2011.14.issue-1