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 Serville, 1831 Taxonomic remarks. Gorochov (2020) included the genus Eumecopoda and his new Paramecopoda as subgenera in Mecopoda based on their morphological similarity and because „the subgeneric position of some species is somewhat problematic“. However, the latter problem cannot be solved by downgrading, and all Eumecopoda species (including Paramecopoda) are characterized by falcate tegmina (see also below under Eumecopoda ). Until genetic data are available we consider the two groups as separate genera. Eumecopoda genus stat. rev. Generic characters (after Liu et al. 2020 ). FIGURE 3. Apical area of male cerci of specimens from Java (A–G, J–K) and Borneo (H–I, M–P). A–D: M. javana from Palabuan Ratu (A 3261437 neotype; B 3261432; C 3261435; D 3261436); E–I: M. himalaya group (E 3261440 Gunung Salak; F 3261448 Bogor; G, 3254643 P. Ratu; H, 3261454 Sarawak near Batu Niah, I 3261461 Nanga Ngungun); J: unknown group from Palabuan Ratu forest (3261434 large species); K–L: M. paucidens (K 3261458 Gunung Lawu, L type from Timor); M: M. himalaya from Sabah (CRTmeceloM01); N–P: M. s. stridulata from Sabah (N CRTmeceloM02 from Poring; O OTRmeceloS15 and P OTRmeceloS16 from Matunggong). FIGURE 4. Apical area of male cerci of specimens from Thailand. A–D: M. fallax ( A–B 3254538 NamNao left and right cercus; C 3261689 Khao Lak; D 3261441 Sok); E: M. himalaya (3254539 Monkrating); F–I: confracta subgroup ( F 3261445 Chiang Mai in town; G 3261455 do. near Huei Khaeo Waterfall, H 3261456 do. Doi Suthep in mountain; I 3261452 Phrao district; J 3261444 Khao Yai); K–N: unknown subgroup ( K 3261447 Khao Chong; L 3261449 Nan not voucher for song; M–N 3261442 Khao Sok right and left cercus). Diagnostic characters. Large-sized species (habitus see e.g., fig. 4 in Liu et al. 2020 ). Fastigium verticis widened anteriorly. Head sulcate, with or without transverse lateral apices. Disc of pronotum flat, with truncate anterior and obtusely angular posterior margins, and distinct lateral carina. Tegmina surpassing apices of posterior femur. Prosternum bispinose. Male cerci with incurved apices, at tip with two minute acute teeth ( Fig. 3–4 ) as in many other mecopodine genera. Male subgenital plate elongate, with styli and distinct apical notch. Ovipositor robust, elongate, sword-like. Redescription. Head. Fastigium verticis widely truncated and 1.5–3 times wider than scapus. Thorax. Pronotum elongated and broadened backward. Male pronotum narrowest in the beginning of prozona, broadened backward after the first transverse sulcus. Disc of pronotum flat with the exception of distinct depression around the sulcus. Legs robust and long. Anterior coxa armed with a spine. Anterior femur longer than pronotum. Anterior and median femora with indistinct tiny spines on ventro-anterior margin; posterior femora with a few small spines near apex on ventro-posterior margin. Each tibia with fine spines on each margin. Tympana on the fore tibiae fully open on both sides, tibia widened at and abruptly constricted below tympana. Female pronotum similar to that of male in general, but less broadened backward especially in the ending of metazona. Wings. Male tegmina well developed, extending beyond abdominal apex and surpassing apex of hind femur. Large and often complicated mirror cells near base of the right tegmen ( Fig. 13 ). Number of stridulatory teeth between 44 and 139 (see Fig. 11 ), the lowest number observed in M. paucidens sp. nov. and the highest in M. prominens Gorochov, 2020 . Female tegmina also well developed extending beyond apex of abdomen, but distinguished from male tegmina by length and shape. Key to species (partly after Redtenbacher 1892 ) 1 fastigium verticis rounded, no transverse keel; gap between fastigium frontis and fastigium verticis closed or separated by a fine suture; mirror on right male tegmen pretzel-shaped ( Fig. 1 , Fig. 13 A–P )..................... Mecopoda elongata group 1’ fastigium verticis blunt, with transverse keel; gap between fastigium frontis and fastigium verticis distinct; Fig.14 ); mirror on right male tegmen in shape roundish ( Fig. 13 O–N ).......................................................... 2 2 male subgenital plate broad with a small caudal incision ( Fig. 17 A ).............................. Mecopoda angusta . 2’ male subgenital plate long and fork-like ( Fig. 17 B, C )........................................................ 3 3 body small, tegmina short (see Tab. 5 ; only one male known; Sumatra )................ Mecopoda kerinci Gorochov, 2020 3’ larger............................................................................................... 4 4 gap between fastigium frontis and fastigium verticis wide, deep................................. Mecopoda dilatata 4’ gap between fastigium frontis and fastigium verticis subtle.................................... Mecopoda divergens