Studies in Mexican Grasshoppers: Four new species of Reyesacris Fontana Buzzetti & Mariño-Pérez, 2011 (Orthoptera: Acrididae: Ommatolampidinae) Author Mariño-Pérez, Ricardo 0000-0002-0566-1372 pselliopus@yahoo.com.mx Author Sanabria-Urbán, Salomón Author Pocco, Martina E. 0000-0002-3966-4053 martinapocco@fcnym.unlp.edu.ar Author Foquet, Bert 0000-0003-1643-6522 bert.foquet@gmail.com Author Song, Hojun 0000-0002-0566-1372 pselliopus@yahoo.com.mx text Zootaxa 2021 2021-09-17 5039 4 518 536 journal article 10.11646/zootaxa.5039.4.4 1175-5326 5516017 F1612814-C749-4F8E-8330-36061C859F4F 5. Reyesacris tika sp. nov. Mariño-Pérez, Sanabria-Urbán, Pocco, Foquet, & Song Figs. 2E & F , 7 , 10 , 12C Diagnosis. Hind margin of 10 th abdominal tergite with three large dark knobs. Male supra-anal plate with 2 + 2-3 large dark knobs. Sclerotized surrounding areas of lophi of epiphallus ovoid in dorsal view. Dorsal margin of the sheath of aedeagus slightly rounded in lateral view, fused with dorsolateral projections of the dorsal aedeagal valves forming an apical groove. Short aedeagal valvae, almost covered by the sheath of aedeagus; apex of dorsal valves with anterior outer margin directed ventrally, involving laterally ventral ones. FIGURE 7. Reyesacris tika sp. nov. A. Male terminalia, dorsal view. B. Epiphallus, dorsal view, posterior downwards. C. Epiphallus, anterior view, dorsal downwards. D. Ecto + Endophallic complex, dorsal view. E. Ecto + Endophallic complex, left lateral view. Arrows in D and E indicate key characteristics of sheath of aedeagus and aedeagal valvae. Scale bar 250 μm. Male description ( Fig. 2E & F ). External genitalia ( Fig. 7A ). Cerci triangular with internal spine in the basal half. Margin of 10 th abdominal tergite thickened and forming three black projections. Supra-anal plate triangular with dilated margins. Four to five large knobs in a 2 + 2-3 pattern. Internal genitalia ( Fig. 7B–E ). Epiphallus ( Fig. 7B & C ). Well sclerotized, bridge almost straight, anterior projections globose and rounded. Ancorae triangular. Lophi prominent with an anterior portion and surrounding areas well sclerotized. Ovoid shape of this sclerotized area from dorsal view. Lateral plates poorly developed. Posterior projections enlarged. Oval sclerites semi-triangular. Ecto + Endophallus complex ( Fig. 7D & E ). Ectophallus. Apodemes of cingulum elongated. Zygoma welldeveloped. Rami well-developed. Sheath of aedeagus folded at tip with dorsal margin slightly rounded in lateral view. This dorsal margin fuses with the lateral-dorsal projections of the dorsal valvae of aedeagus forming an apical groove evident in lateral view of ectophallus. Endophallus. Apodemes of endophallus laterally compressed, arch of aedeagus elevated (“L shaped, in lateral view). Dorsal valvae well sclerotized, with dorsolateral quadrated projections (“anterior margins nearly perpendicular to body axis). Apex of the dorsal valvae with anterior outer margin directed ventrally and involving laterally ventral ones. Ventral valvae a little longer than dorsal ones, semicircular and with expanded rounded apex. Both valvae almost covered by sheath of aedeagus. Female description. Cerci small conical and supragenital plate semi triangular. Etymology. The specific epithet is referring to the name given by local people to grasshoppers in Mixteco language. Male measurements (4). Pronotum length 3.41–3.61 (3.49; 0.09); tegmen length 2.47–3.35 (2.95; 0.36); hind femur length 9.85–10.32 (10.07; 0.21). Female measurements (1). Pronotum length 4.93; tegmen length 3.79; hind femur length 13.08. Male holotype . Mexico , Oaxaca, San Isidro Paz y Progreso. L 22-2018. 1365 m ( 17.0734°N ; 97.837°W ) . 30- X-2018 . Legit Sanabria-Urbán, Jiménez-Arcos. CAFESI . Additional type material. Five males and one female (adults) and five males and five females (nymphs) same data as above. UMMZ , CAFESI . Geographic distribution. Only known from type locality ( Fig. 11 ), which is found in the Mixtec region , along the external versant of the Sierra Madre del Sur near the boundaries between Oaxaca and Guerrero states. This species al also found in mid-elevations in association mainly with tropical mountainous and cloud forests vegetation .