Revision of the subgenus Mesopraocis Flores & Pizarro-Araya of the Neotropical genus Praocis Eschscholtz (Coleoptera, Tenebrionidae, Pimeliinae) Author Flores, Gustavo E. https://orcid.org/0000-0002-9108-7038 Instituto Argentino de Investigaciones de las Zonas Aridas (IADIZA), Laboratorio de Entomologia, Centro Cientifico Tecnologico CONICET, Av. Ruiz Leal s / n, Parque General San Martin, 5500 Mendoza, Argentina gflores@mendoza-conicet.gob.ar Author Pizarro-Araya, Jaime https://orcid.org/0000-0002-1595-6924 Laboratorio de Entomologia Ecologica (LEULS), Departamento de Biologia, Facultad de Ciencias, Universidad de La Serena, Casilla 554, La Serena, Chile & Grupo de Artropodos, Sistema Integrado de Monitoreo y Evaluacion de Ecosistemas Forestales Nativos (SIMEF), Chile & Instituto de Ecologia y Biodiversidad (IEB), Santiago, Chile text ZooKeys 2022 2022-05-12 1100 29 55 http://dx.doi.org/10.3897/zookeys.1100.78769 journal article http://dx.doi.org/10.3897/zookeys.1100.78769 1313-2970-1100-29 DA4BFBDD260942F1BCF9A1666BDB2F56 A4AC2778D50652AB9D11B49356F22087 Praocis (Mesopraocis) calderana Kulzer, 1958 Figs 3A, B , 4B , 5 Praocis calderana Kulzer, 1958: 32 (rev.); Pena 1966 : 431 (cat.); Vidal and Guerrero 2007 : 73, 218; Pizarro-Araya et al. 2008 : 273 (list.); Pizarro-Araya et al. 2012 : 9 (ecol.); Flores and Pizarro-Araya 2014 : 60 (list). Redescription. Length 6.25-9.00 mm. Body, antennae, legs black, dark brown to light brown, body widest at prothorax. Head. Clypeus with punctures bearing short setae on all surface, width of anterior margin equal to half the interocular width; frons with punctures bearing short setae on all surface, border of punctures not elevated; frontoclypeal suture lacking setae; eyes lacking supraocular groove; antennae reaching anterior third of lateral margin of pronotum; antennomere 9 wider than long, 11 longer than wide, antennomere 9 of equal length to 10 and shorter than 11, antennomere 9 of equal width to 10 and wider than 11, antennomere 10 wider than 11. Thorax . Pronotum with anterior angles rounded, produced, very close to eyes and epicanthus, lateral margin explanate, disc convex not reaching lateral margins (Fig. 4B ); posterior margin bisinuate, central area not extending beyond lateral extents of posterior margin (Fig. 4B ), posterior angles acute, pointed, produced. Hypomeron with a fringe of long golden setae below lateral margin of pronotum. Metaventrite with punctures on lateral thirds separated by one to two puncture diameters. Elytron . Pseudopleuron with sparse punctures of which emerge short, erect setae, becoming long, dense on anterior half of upper surface, punctures separated by three to six puncture diameters on lower surface, separated by one to two puncture diameters on anterior half of upper surface; epipleuron with a fringe of long golden setae on anterior half of edge, texture different than that of elytron, shiny, almost smooth, with sparse punctures and setae. Legs . Ventral surface of trochanters with single long setae. Apical process of distal margin of protibiae equal to length of protarsomeres 1-3 combined; protibial length twice the width of distal margin. Metatarsomere 1 twice as long as metatarsomeres 2-3 combined. Abdomen . Ventrites 1-3 with sparse punctures separated by two to four puncture diameters; ventrite 4 with sparse punctures separated by one to two puncture diameters; ventrite 5 with punctures on central area separated by two to four puncture diameters, on lateral thirds separated by one to two puncture diameters. Male genitalia (Fig. 3A, B ). Basal lamina of tegmen proximally narrow, with base pointed. Lateral styles of tegmen with proximal margin triundulate, medially notched, with setae on distal 1/6 of ventral surface. Median lobe equal width throughout, one third of the width of tegmen, with apical aperture small. Type specimens. Holotype male: [Caldera/ (8 km SE)/ Costa Atacama/ 17.vi.1955/ Coll: L.E. Pena ] [Holotypus/ Praocis / Praocis calderana m./ det. H. Kulzer 1957] (FMNH); allotype female (FMNH) and two paratypes with the same data as holotype plus [Paratypus/ Praocis / Praocis calderana m./ H. Kulzer 1957] (FMNH). Other material examined. Chile . Antofagasta Region : Antofagasta Province : Antofagasta . 20 km N Paposo, vi.1985 , L.E. Pena , 4 (FMNH), S Paposo, sand dunes, 25°07'1.8"S , 70°28'52."W, 5.xi.2012 , M. Elgueta, 3 (MNNC), 8 (IADIZA), 2 (LEULS), 17 km S Paposo, playa Las Losas, 9.iii.2017 , 25.13746°S , 70.46178°W , G. Flores , R. Predel, M. Blaeser , L. Ragionieri, A. Zuniga , 18 (IADIZA), 2 (LEULS). Atacama Region: Chanaral Province: Parque Nacional Pan de Azucar , 14.x.1992 , L.E. Pena , 4.v.2003 , J. Pizarro-Araya, 4 (IADIZA), 6 (LEULS), Cerro Verde, 26.29759°S , 70.64099°W , x.2017 , A. Zuniga , 2 (MNNC), 3 (IADIZA), 2 (LEULS), 20 km S Chanaral , 16.ix.2000 , M. Beeche , 2 (MNNC), 15 km N Chanaral , 21.ix.2000 , M. Beeche , 2 (MNNC), N Flamenco, 19 m , sand dunes, 26°32'51.9"S , 70°41'09."W, 30.x.2010 , M. Elgueta, 3 (MNNC). Copiapo Province: Rodillo, 27.x.1989 , H. Vasquez , 1 (IADIZA), 8 (LEULS); ix.1990 , H. Vasquez , 3 (IADIZA), 11 (LEULS); 15.x.1991 , J. Cepeda, 2 (IADIZA), 8 (LEULS), Quebrada El Leon , Caldera, 1.ix.2007 , J. Pizarro-Araya, 2 (IADIZA), 6 (LEULS), 01.xi.2007 , P. Agusto (LEULS), Quebrada El Leon , Caldera, 26°57'44"S , 70°45'51"W , 21.ii.2006 , J. Pizarro-Araya, 5 (LEULS), Punta Frodden, 20 km N Caldera, 26.iv.1956 , L.E. Pena , 1 (FMNH), 20 km SE Caldera, 8.xii.1967 , L.E. Pena , 31 (FMNH), 12 km E Caldera, 341 m , 27°06'2.8"S , 70°40'23." W, 13.xi.2010 , M. Elgueta, 2 (MNNC), 10 km N Caldera, 4.x.1983 , A. Roig, 4 (IADIZA), 1 (LEULS), Caldera, 17.vi.1955 , L.E. Pena , 4 (MNNC), 2-4.x.1981 , M. Elgueta, 6 (MNNC), Bahia Inglesa, 15.ix.2000 , M. Beeche , 2 (MNNC), Bahia Inglesa, 3 m , sand dunes, 27°06'26.9"S , 70°51'03."W, 6.xi.2012 , M. Elgueta, 8 (IADIZA), 2 (LEULS), Bahia Inglesa, sand dunes, 27.1°S , 70.8667°W , 24.i.2010 , E. Ruiz, J. Mondaca, F.M. Alfaro (3 IADIZA), Boca Rio Copiapo , 13.vi.1968 , L.E. Pena , 1 (FMNH), 40 km S Copiapo , 25.x. 1983 , L.E. Pena , 1 (FMNH), Puerto Viejo, 10.x.1980 , L.E. Pena , 3 (FMNH), ix.1982 , L.E. Pena , 9 (FMNH), Ruta 5 norte con Puerto Viejo, 157 m , 27°21'34"S , 70°40'"W, 24.i.2010 , E. Ruiz Manzanos, F.M. Alfaro, J. Mondaca, 1 (IADIZA). Huasco Province : Playa Blanca, 11.iii.2017 , 26.17352°S , 70. 66057°W , G. Flores , 1 (IADIZA), Carrizal Bajo, Vallenar, xi.1991 , H. Vasquez , 8 (LEULS), Parque Nacional Llanos de Challe, 15.x.1997 , pitfall traps 1 (LEULS). Coquimbo Region: Elqui Province: Chungungo, Playa Blanca, 27.ii.2005 , J. Pizarro-Araya, 3 (LEULS), Lagunillas, Coquimbo, xi.1990 , pitfall traps 11 (LEULS).