Studies on Neotropical Pseudophyllinae: The status of the genus Brachyauchenus Brunner von Wattenwyl, 1895 and its species (Orthoptera: Tettigoniidae: Pseudophyllinae: Platyphyllini) Author Cadena-Castañeda, Oscar J. Author Rodríguez, Nixon Oscar Parra 0000-0001-5646-0602 Universidad INCCA de Colombia. Grupo en Ecología Evolutiva y Biogeografía Tropical ECOBIT. & oscarparra 91 r @ gmail. com; https: // orcid. org / 0000 - 0002 - 3613 - 0339 ojccorthoptera@gmail.com Author Res, Gustavo Costa Tava- Universidade Federal do Pará (UFPA), Instituto de Ciências Biológicas (ICB), Av. Augusto Correa # 1 66075 - 110, Belém, PA, Brazil. Grupo de Estudos de Artrópodes da Amazônia (GEAA). Author Rodríguez, Diana Marcela Trujillo 0000-0001-5646-0602 Universidad INCCA de Colombia. Grupo en Ecología Evolutiva y Biogeografía Tropical ECOBIT. & Universidad Internacional de La Rioja, La Rioja, España. ojccorthoptera@gmail.com Author Arias, Ronald Fernando Quintana 0000-0001-5646-0602 Universidad INCCA de Colombia. Grupo en Ecología Evolutiva y Biogeografía Tropical ECOBIT. & ron 902102004 @ gmail. com; https: // orcid. org / 0000 - 0002 - 3691 - 3464 ojccorthoptera@gmail.com text Zootaxa 2021 2021-09-02 5027 4 546 562 journal article 10.11646/zootaxa.5027.4.4 1175-5326 5453427 4265E1D4-2F04-49F9-97C5-96B255E4FE91 Key to Mikrischyrum n. gen. species 1. Very small species ( 12 mm .). Posterior margin of pronotum truncate; pronotal disc elongated, L/W ca 2.0; tegmina covering the apex of the abdomen; all genicular lobes armed with elongated spines, the most conspicuous being those of the internal lobes of the fore and middle legs, and the outer genicular lobes of the hind femora has the longest spine............................................................................................. M. minutus ( Nickle, 2006 ) n. comb. - Small species ( 21 mm .) ( Fig. 7A ). Posterior margin of pronotum convex; pronotal disc proportionally smaller, L/W ca 1.6 ( Fig. 7B ); tegmina not covering the last two or three abdominal segments ( Fig. 7A ), only the external genicular lobes of the posterior femora armed by a medium-sized spine, the other genicular lobes unarmed............ M. festae ( Griffini, 1896 ) n. comb.