Aulacus Aulacus chilensis Eurygona Aulacus chilensis Towards a revision of the South American genus Praocis Eschscholtz (Coleoptera, Tenebrionidae), with estimation of the diversity of each subgenus Flores, Gustavo E. Pizarro-Araya, Jaime ZooKeys 2014 415 53 80 Gay & Solier in Solier, 1840 Gay & Solier in Solier 1840 Insecta Tenebrionidae Praocis GBIF Animalia Praocis (Orthogonoderes) Coleoptera 13 66 Arthropoda subGenus Orthogonoderes   AulacusGray, 1832: 783. Type species: Aulacus chilensisGray, 1832, monotypy. Synonymy by Kulzer (1958).  EurygonaLaporte, 1840: 187. Type species: Aulacus chilensisGray, 1832, monotypy. Synonymy by Kulzer (1958).  Type species.  Praocis subreticulataGay & Solier in Solier, 1840, present designation.  Diagnosis. Clypeus with anterior margin extending beyond to lateral expansion of frons, width of anterior margin not exceeding half the interocular width, clypeal suture as a horizontal groove covered by frons, clypeus lower than frons; antennomere 9 longer than antennomere 10, antennomere 11 shorter than antennomere 10; apical tomentose sensory patches on antennomere 10 in two areas subequal in size, on antennomere 11 on distal third; prosternum without a narrow edge on anterior margin; lateralmargin of elytron well defined; ventral surface of profemora without a row of setae on anterior edge, protibiae explanate.  Distribution. Species of  Praocis(Orthogonoderes)inhabit central and northern Chile, western and northern Argentina, western Bolivia and southern Peru. They occur from 12°South (Cuzco, Peru) to 38°South in Chile (Nahuelbuta) and 39°South in Argentina ( Neuquen) in the biogeographic provinces of Puna, Atacama, Coquimbo, Santiago, Maule, Prepuna, Monte, and Central Patagonia ( Morrone 2006). One species ( Praocis (Orthogonoderes) insularisKulzer) has been recorded in the Guacolda island in the Pacific Ocean (28°S) ( Kulzer 1958;  Pena1966) (Fig. 29).  New records. We present a new record of Praocis argentinaKulzer for the Atlantic coast in Argentina, the isthmus of Peninsula Valdes, 42°30'S.  Diversity. This subgenus contains 23 species ( Kulzer 1958; Flores 2007, 2009) plus 10 species to be described, 33 species in total, with a 43 percent increase in the number of species (Fig. 33).  Habitat. Species of Praocis (Orthogonoderes)have diurnal and crepuscular habits, hiding during the night under shrubs or stones. In central Chile they can be observed in coastal dunes stabilized with vegetation or paleodunes, gullies, coastal plains, transverse valleys and Coastal and Andean mountain ranges from sea level to an altitude of 2700 m. In Argentina, Bolivia, Peru, and northern Chile, they occur from 1600 m high altitudinal valleys associated with the Andes mountain range to an altitude of 4200 m in the high Puna plateau, in sandy soils or in clayey, poorly permeable soils (  Cortes-Contreraset al. 2013; collection data FMNH, IADIZA, LEULS, and pers. obs). The only species inhabiting Patagonian steppes, Praocis (Orthogonoderes) argentina, is recorded from 1700 m in southern Mendoza to sea level on the Atlantic coast in Argentina (collection data IADIZA, LEULS, and pers. obs.). Orthogonoderesis the only subgenus inhabiting both the Pacific and Atlantic coasts of South America (Fig. 30).  Species included.  Praocis cribrataGay & Solier in Solier, 1840; Praocis adspersaGermain, 1855; Praocis depressicollisGermain, 1855; Praocis ecostataKulzer, 1958; Praocis subreticulataGay & Solier in Solier, 1840; Praocis dentipesGermain, 1855; Praocis pleuropteraGay & Solier in Solier, 1840 (= Praocis convexaGermain, 1855, synonymy by Flores 2007); Praocis plicicollisGermain, 1855; Praocis laevicollisPhilippi & Philippi, 1864 (= Praocis nitidicollisPhilippi & Philippi, 1864, synonymy by Kulzer 1958); Praocis ebeninaGermain, 1855; Praocis picipesGermain, 1855 (= Praocis consobrinaPhilippi & Philippi, 1864, synonymy by Kulzer 1958) (= Praocis rotundicollisPhilippi & Philippi, 1864, synonymy by Kulzer 1958); Praocis costipennisSolier, 1851; Praocis rugataGay & Solier in Solier, 1840; Praocis punctataGay & Solier in Solier, 1840; Praocis rotundataLacordaire, 1830 (= Praocis sororKulzer, 1958, synonymy by Flores and Pizarro-Araya 2010); Praocis variolosaErichson, 1834; Praocis variolosa laxepunctataKulzer, 1958; Praocis penaiKulzer, 1958 (incorrect original spelling: penai, Article 32.5 ICZN 1999); Praocis chilensis(Gray, 1832); Praocis insularisKulzer, 1958; Praocis tibiellaKulzer, 1958; Praocis argentinaKulzer, 1962; Praocis magnoiMolinari, 1969.