A new species of Capnia Pictet, 1841 (Plecoptera: Capniidae) from Kyushu, Japan, with description of male drumming signals.

摘要

A new species of the genus Capnia Pictet, 1841, Capnia mitsuseana sp. n. (Plecoptera: Capniidae), from Japan is described on the basis of male and female adults, and male drumming signal. Males of the new species are characterized by a modified abdominal tergum 7 with a pair of small tubercles on the anterior margin and with a large tubercle on the posterior margin; a long and rather narrow main epiproct sclerite with a pair of needle-like processes on either side of the tip. Females have abdominal sternum 7 protruding caudally and short subgenital plate that is nearly same length of sternum 8. The males produced monophasic call signals in succession by percussion involving up-down abdominal movements under solitary condition, and the male call signals show horizontal inter-beat interval patterns.