Journal article

Publication year: 2016

Pages: 187-195

Journal: Acta Zoologica

Volume number: 97

Issue number: 2

DOI Link: https://doi.org/10.1111/azo.12116

Publisher: Wiley

Abstract: 

Mechanoreceptor organs occur in great diversity in insect legs. This
study investigates sensory organs in the leg of atympanate cave crickets
(Troglophilus neglectus KRAUSS, 1879) by neuronal tracing.
Previously, the subgenual and the intermediate organs were recognised in
the subgenual organ complex, lacking the tympanal membranes present for
example in the tibial hearing organs of Gryllidae and Tettigoniidae. We
document the presence of the accessory organ in T. neglectus.
This scolopidial organ is located in the posterior tibia close to the
subgenual organ and can be identified by position, innervation and
orientation of the dendrites of sensory neurons. The main motor nerve in
the leg innervates a part of the subgenual organ and the accessory
organ. The dendrites of sensory neurons in the accessory organ are
characteristically bent in proximo‐dorsal direction, while the subgenual
organ dendrites run distally along the longitudinal axis of the leg.
The accessory organ contains 6–10 scolopidial sensilla, and no
differences in neuroanatomy occur between the three thoracic leg pairs.
Hence, the subgenual organ complex in cave crickets is more complex than
previously known. The wider taxonomic distribution of the accessory
scolopidial organ among orthopteroid insects is inconsistent, indicating
its repeated losses or convergent evolution.

Harvard Citation style: Strauß, J. and Stritih, N. (2016) The accessory organ, a scolopidial sensory organ, in the cave cricket Troglophilus neglectus (Orthoptera: Ensifera: Rhaphidophoridae), Acta Zoologica, 97(2), pp. 187-195. https://doi.org/10.1111/azo.12116

APA Citation style: Strauß, J., & Stritih, N. (2016). The accessory organ, a scolopidial sensory organ, in the cave cricket Troglophilus neglectus (Orthoptera: Ensifera: Rhaphidophoridae). Acta Zoologica. 97(2), 187-195. https://doi.org/10.1111/azo.12116