Bioacoustics and systematics of Mecopoda (and related forms) from South East Asia and adjacent areas (Orthoptera, Tettigonioidea, Mecopodinae) including some chromosome data Author Heller, Klaus-Gerhard Grillenstieg 18, 39120 Magdeburg, Germany Author Baker, Ed Department of Electronic Engineering, University of York, York, YO 10 5 DD, United Kingdom & Department of Life Sciences, Natural History Museum, London, SW 7 5 BD, United Kingdom. Author Ingrisch, Sigfrid Zoological Research Museum Alexander Koenig, Adenauerallee 160, D- 53113, Bonn, Germany. Author Korsunovskaya, Olga Lomonosov Moscow State University; Leninskie Gory, 1, building 12, Moscow, 119234, Russia. Author Liu, Chun-Xiang 0000-0002-6313-196X Key Laboratory of the Zoological Systematics and Evolution, Institute of Zoology, Chinese Academy of Sciences, Beijing, China. iucx @ ioz. ac. cn; https: // orcid. org / 0000 - 0002 - 6313 - 196 X iucx@ioz.ac.cn Author Riede, Klaus Zoological Research Museum Alexander Koenig, Adenauerallee 160, D- 53113, Bonn, Germany. Author Warchałowska-Šliwa, Elżbieta 0000-0001-7812-1644 Institute of Systematics and Evolution of Animals, Polish Academy of Sciences, Kraków, Poland. warchalowska @ isez. pan. krakow. pl; https: // orcid. org / 0000 - 0001 - 7812 - 1644 warchalowska@isez.pan.krakow.pl text Zootaxa 2021 2021-07-26 5005 2 101 144 journal article 2565 10.11646/zootaxa.5005.2.1 49bbd860-f04e-444c-8c91-43b938789f38 1175-5326 5141281 6DF7D106-A8FD-4670-AC09-18166D7F4BD4 Mecopoda niponensis ( Haan, 1843 ) The species can morphologically be separated from all other congeneric species by its short and wide tegmina ( Fig. 5 A ; see measurements in Liu Cx et al. 2020). Also its trilling calling song, studied in China (Liu YF et al. 2019; Liu Cx et al. 2020), Japan ( Ichikawa et al. 2006 ; Yamamoto 2006) and Korea ( Kim 2009 ), shows a characteristic amplitude modulation (see Fig. 6–7 ), clearly different from other Mecopoda species. However, we have a specimen from Vietnam at hand in which morphology and song pattern disagree. The trilling song of this animal shows the typical niponensis pattern, but it has unusually long and narrow tegmina. With a length/width ratio of 3.43 it is just outside the range (2.19–3.36) given by Liu Cx et al. (2020) for niponensis . More important, the tegmen length ( 55 mm ) is far outside the range of niponensis ( 34–49 mm , Liu Cx et al. 2020; 40–43 mm in Korea , Storozhenko et al. 2015 ). Since it has additional song components not known from niponensis , and was found outside the known range of the species, we consider it as member of a new subspecies (see below).