@article {52680, title = {The spider-like katydid Arachnoscelis (Orthoptera: Tettigoniidae: Listroscelidinae): anatomical study of the genus}, journal = {Zootaxa}, volume = {3666}, year = {2013}, month = {Apr-06-2013}, pages = {591}, abstract = {

This paper provides some observations on the anatomy of the neotropical katydid Arachnoscelis arachnoides Karny (In- secta: Orthoptera: Tettigoniidae). Arachnoscelis is a genus of predaceous katydids that comprise species that resemble spi- ders in their general body appearance. The type species, A. arachnoids, was described in 1891 from a single male collected in Colombia. Following the original description, these creatures were never found again, and were thought to have gone extinct or mistakenly assigned to the type locality. But between 1891 and 2012 four more species were described and in- correctly assigned to Arachnoscelis based on a similarity of body form. In this paper we present an anatomical comparai- son of Arachnoscelis and its relatives, and propose that Arachnoscelis should be treated as a monotypic genus. This implies that other species previously described in Arachnoscelis, should be placed in different genera.

}, keywords = {bushcricket, Colombia, predator, stridulation, ultrasound}, issn = {1175-5326}, doi = {10.11646/zootaxa.3666.410.11646/zootaxa.3666.4.11}, url = {http://biotaxa.org/Zootaxa/issue/view/zootaxa.3666.4}, author = {Montealegre-Z, Fernando and Cadena-Castaneda, Oscar J. and Benedict D. Chivers} } @article {11175, title = {Ultrasonic reverse stridulation in the spider-like katydid Arachnoscelis (Orthoptera: Listrosceledinae)}, journal = {Bioacoustics}, volume = {23}, year = {2014}, month = {Feb-01-2014}, pages = {67 - 77}, abstract = {

This paper illustrates the biomechanics of sound production in the neotropical predaceous katydid Arachnoscelis arachnoides (Insecta: Orthoptera: Tettigoniidae). Described and previously known from only one male specimen, this genus of predaceous katydids resembles spiders in their general body appearance. To call distant females, male katydids produce songs by stridulation where one forewing possessing a sclerotized file rubs against a row of teeth (scraper) on the other wing. In most katydid species, the songs are produced during the wing-closing phase of the stridulation. Morphological comparative studies of the stridulatory apparatus of the type specimen of Arachnoscelis arachnoides and males of other closely related species suggest that this insect sings with a frequency of ca. 80 kHz to attract conspecific females. We found an abundant population of A. arachnoides in Central Northeast of Colombia and undertook a complete analysis of the biomechanics of stridulation in this species. Using ultrasound-sensitive equipment and high-speed video, we determined that male A. arachnoides sing at ca. 74 kHz and use elastic energy and wing deformation to reach such ultrasonic frequencies. In contrast to most katydids, males of this species produce their calls during the opening phase of the wing; this form of stridulation is discussed.

}, keywords = {biomechanics, Colombia, elastic energy, stridulation, ultrasound}, issn = {0952-4622}, doi = {10.1080/09524622.2013.816639}, url = {http://www.tandfonline.com/doi/abs/10.1080/09524622.2013.816639}, author = {Benedict D. Chivers and Jonsson, Thorin and Cadena-Castaneda, Oscar J. and Fernando Montealegre-Zapata} }