Homotoicha amazoniensis (Cadena-Castaneda, 2015) Gorochov, 2018

Gorochov, A. V., 2018, Systematics of the American Katydids (Orthoptera: Tettigoniidae). Communication 8, Proceedings of the Zoological Institute of the Russian Academy of Sciences 322 (4), pp. 398-456 : 452

Genus Euthyrrhachis Brunner-Wattenwyl, 1878

Note. This genus was recently included in the tribe Ectemnini Cadena-Castañeda, 2015 containing only two genera ( Euthyrrhachis and Ectemna Brunner-Wattenwyl, 1878 ; Cadena-Castañeda 2015). However, such status for this group is problematic because these genera have some characters of the male tegminal stridulatory apparatus similar to those of Parableta and Microcentrini . But in Euthyrrhachis , this apparatus has at least one important feature which may be a good diagnostic character for this genus: its stridulatory vein in the left tegmen consists of a thick and rather short transverse part (having a thinner parallel vein along its distal border) and thinner oblique part almost reaching lateral edge of dorsal field (the both parts have stridulatory teeth on their ventral surface; Figs 331, 333–335, 337, 338, 340 ). This character as well as all the other features, visible in the photographs from the above-mentioned paper, allow me to put Homotoicha amazoniensis Cadena-Castañeda, 2015 ( Colombia) in Euthyrrhachis as E. amazoniensis comb. nov.

Figures

Figs 331–340. Euthyrrhachis Br.-W., male: 331–337 – possible E. consobrina consobrina (Br.-W.) from “Reserva Comunal Ashaninka” (331–334) and from environs of Rio Venado Vill. (335–337); 338–340 – E. c. elsol subsp. nov. Stridilatory apparatus of left (331, 335, 338) and right (332, 336, 339) tegmina; stridulatory vein of left tegmen from below (333, 334, 337, 340).