@article {Vedenina2007Unusual,
	title = {The unusual inheritance pattern of the courtship songs in closely related grasshopper species of the Chorthippus albomarginatus-group (Orthoptera: Gomphocerinae).},
	journal = {Journal of evolutionary biology},
	volume = {20},
	number = {1},
	year = {2007},
	month = {January},
	pages = {260{\textendash}277},
	abstract = {Sibling species of the Chorthippus albomarginatus-group are exceptional among all European grasshopper species because they have an extremely elaborate courtship behaviour. Here, we present a genetic analysis of the courtship song differences between two closely related grasshopper species Ch. albomarginatus and Ch. oschei. Measurements of seven courtship song characters and one parameter of courtship visual display were compared among parentals, F(1) and F(2) hybrids, and backcrosses. Variation in one morphological character, the number of stridulatory pegs, was studied as well. The distributions of song phenotypes were more consistent with a type-III genetic architecture, which involves complementary or duplicate pairs of loci. We suggest that this type of architecture may provide the novel elements of the hybrid songs, even more complex than the parental ones, which may offer a new starting point for sexual selection. One parameter of the visual display appeared to be controlled by a single locus, but differences in other characters of visual display could be explained by a more complex inheritance pattern. Inheritance of the peg number differences was consistent with a simple polygenic additive model. Sex linkage and/or maternal effects were not detected for any trait. We found a disproportionate influence of the Ch. albomarginatus parent on most hybrid song characteristics and the visual display, and this may support a previously suggested idea that Ch. albomarginatus is an ancestral form and Ch. oschei is a derived species.},
	keywords = {acrididae, bioacoustics, grasshoppers, orthoptera, song},
	issn = {1010-061X},
	doi = {10.1111/j.1420-9101.2006.01204.x},
	url = {http://dx.doi.org/10.1111/j.1420-9101.2006.01204.x},
	author = {Vedenina, V. Yu and Panyutin, A. K. and Von Helversen, O.}
}
@article {Riede1990Tympana,
	title = {Tympana, auditory thresholds, and projection areas of tympanal nerves in singing and silent grasshoppers (Insecta, Acridoidea)},
	journal = {Zoomorphology},
	volume = {109},
	number = {4},
	year = {1990},
	month = {March},
	pages = {223{\textendash}230},
	keywords = {acrididae, grasshoppers, hearing, neuroanatomy, orthoptera, tympana},
	issn = {0720-213X},
	doi = {10.1007/BF00312473},
	url = {http://dx.doi.org/10.1007/BF00312473},
	author = {Riede, K. and K�mper, G. and H�fler, I.}
}
@article {Riede1987Comparative,
	title = {A Comparative Study of Mating Behaviour in Some Neotropical Grasshoppers (Acridoidea)},
	journal = {Ethology},
	volume = {76},
	number = {4},
	year = {1987},
	month = {April},
	pages = {265{\textendash}296},
	keywords = {acrididae, behaviour, ethology, grasshoppers},
	issn = {01791613},
	doi = {10.1111/j.1439-0310.1987.tb00689.x},
	url = {http://dx.doi.org/10.1111/j.1439-0310.1987.tb00689.x},
	author = {Riede, Klaus}
}
@article {Neuhofer2008Evolutionarily,
	title = {Evolutionarily conserved coding properties of auditory neurons across grasshopper species},
	journal = {Proceedings of the Royal Society B: Biological Sciences},
	volume = {275},
	number = {1646},
	year = {2008},
	month = {September},
	pages = {1965{\textendash}1974},
	abstract = {10.1098/rspb.2008.0527 We investigated encoding properties of identified auditory interneurons in two not closely related grasshopper species (Acrididae). The neurons can be homologized on the basis of their similar morphologies and physiologies. As test stimuli, we used the species-specific stridulation signals of , which evidently are not relevant for the other species, . We recorded spike trains produced in response to these signals from several neuron types at the first levels of the auditory pathway in both species. Using a spike train metric to quantify differences between neuronal responses, we found a high similarity in the responses of homologous neurons: interspecific differences between the responses of homologous neurons in the two species were not significantly larger than intraspecific differences (between several specimens of a neuron in one species). These results suggest that the elements of the thoracic auditory pathway have been strongly conserved during the evolutionary divergence of these species. According to the {\textquoteright}efficient coding{\textquoteright} hypothesis, an adaptation of the thoracic auditory pathway to the specific needs of acoustic communication could be expected. We conclude that there must have been stabilizing selective forces at work that conserved coding characteristics and prevented such an adaptation.},
	keywords = {acrididae, bioacoustics, communication, grasshoppers, interneurons, neurons, orthoptera},
	issn = {0962-8452},
	doi = {10.1098/rspb.2008.0527},
	url = {http://dx.doi.org/10.1098/rspb.2008.0527},
	author = {Neuhofer, Daniela and Wohlgemuth, Sandra and Stumpner, Andreas and Ronacher, Bernhard}
}
