Journal article

Publication year: 2014

Pages: 140240-

Journal: Royal Society Open Science

Volume number: 1

Issue number: 2

ISSN: 2054-5703

Open access status: Gold

DOI Link: https://doi.org/10.1098/rsos.140240

Publisher: The Royal Society

Abstract: 
Comparative studies of the organization of nervous systems and sensory organs can reveal their evolution and specific adaptations. In the forelegs of some Ensifera (including crickets and tettigoniids), tympanal hearing organs are located in close proximity to the mechanosensitive subgenual organ (SGO). In the present study, the SGO complex in the non-hearing cave cricket Troglophilus neglectus (Rhaphidophoridae) is investigated for the neuronal innervation pattern and for organs homologous to the hearing organs in related taxa. We analyse the innervation pattern of the sensory organs (SGO and intermediate organ (IO)) and its variability between individuals. In T. neglectus, the IO consists of two major groups of closely associated sensilla with different positions. While the distal-most sensilla superficially resemble tettigoniid auditory sensilla in location and orientation, the sensory innervation does not show these two groups to be distinct organs. Though variability in the number of sensory nerve branches occurs, usually either organ is supplied by a single nerve branch. Hence, no sensory elements clearly homologous to the auditory organ are evident. In contrast to other non-hearing Ensifera, the cave cricket sensory structures are relatively simple, consistent with a plesiomorphic organization resembling sensory innervation in grasshoppers and stick insects.

Harvard Citation style: Strauss, J., Stritih, N. and Lakes-Harlan, R. (2014) The subgenual organ complex in the cave cricket Troglophilus neglectus (Orthoptera: Rhaphidophoridae) : comparative innervation and sensory evolution, Royal Society Open Science, 1(2), p. 140240. https://doi.org/10.1098/rsos.140240

APA Citation style: Strauss, J., Stritih, N., & Lakes-Harlan, R. (2014). The subgenual organ complex in the cave cricket Troglophilus neglectus (Orthoptera: Rhaphidophoridae) : comparative innervation and sensory evolution. Royal Society Open Science. 1(2), 140240. https://doi.org/10.1098/rsos.140240