Relationships and taxonomy of the genus Diponthus Stål (Orthoptera: Acridoidea Romaleidae) Author Pocco, Martina E. Centro de Estudios Parasitológicos y de Vectores (CEPAVE), CONICET - UNLP, La Plata, Argentina & División Entomología, Museo de La Plata - FCNYM-UNLP, La Plata, Argentina Author Lange, Carlos E. Centro de Estudios Parasitológicos y de Vectores (CEPAVE), CONICET - UNLP, La Plata, Argentina & Comisión de Investigaciones Científicas de la Provincia de Buenos Aires (CICPBA), Argentina Author Cigliano, María Marta Centro de Estudios Parasitológicos y de Vectores (CEPAVE), CONICET - UNLP, La Plata, Argentina & División Entomología, Museo de La Plata - FCNYM-UNLP, La Plata, Argentina text Zootaxa 2023 2023-08-21 5336 1 33 81 http://dx.doi.org/10.11646/zootaxa.5336.1.2 journal article 10.11646/zootaxa.5336.1.2 1175-5326 8268533 F31F6A72-21B8-455D-8E64-3CE59613599C Diponthus pycnostictus Pictet & Saussure, 1887 ( Figs. 2c, d , 6e, f , 7a, b , 8b , 9a, b , 10b , 11b , 12a, b , and 13 ) For references on this species see Pocco et al. (2014) and Cigliano et al. (2023) . Diagnosis. This species is distinguished from D. argentinus by the following characters: whole body mottled black, ground body color reddish orange ( Figs. 2c, d , and 6f ) or yellow and dark grey ( Fig. 6e ); phallic complex: valves of cingulum with anterior margin curved and distal portion oblong ( Fig. 10b ). Chromatic variation. At least two discrete color morphs can be found: color morph reddish orange and dark grey, and color morph yellow and dark grey, in both whole body black mottled ( Pocco et al. 2014 ). A complete redescription of this species and the description of the color morphs are in Pocco et al . (2014) Measurements (in mm). Body length: males: 25.5 (21–33); females: 35.2 (30–40); femur III length: males: 13.8 (12–17); females: 18.3 (15–21); tegmen length: males: 22.1 (19–28); females: 29.2 (26–32). Material examined: see Appendix 1 Distribution. This species is widely distributed in central and northern Argentina ( Buenos Aires , La Pampa , Santa Fe , Entre Ríos , Córdoba , San Luis , La Rioja , Mendoza , Tucumán , Salta ) ( Fig. 13 ). Habitat . In grassland areas with forbs, shrubs, and in edges of low forests.