Liogenys Guérin-Méneville, 1831 (Coleoptera: Scarabaeidae: Melolonthinae Diplotaxini) from the Chacoan Province and its boundaries: taxonomic overview with four new species Author Cherman, Mariana Alejandra Laboratório de Sistemática e Bioecologia de Coleoptera, Departamento de Zoologia, Universidade Federal do Paraná, Caixa Postal 19020, 81531 - 980, Curitiba, Paraná, Brazil. & Laboratório de Scarabaeoidologia, Departamento de Biologia e Zoologia, Instituto de Biociências, Universidade Federal de Mato Grosso, 78060 - 900, Cuiabá, Mato Grosso, Brazil. Author Basílio, Daniel Silva 0000-0003-3556-5880 Laboratório de Sistemática e Bioecologia de Coleoptera, Departamento de Zoologia, Universidade Federal do Paraná, Caixa Postal 19020, 81531 - 980, Curitiba, Paraná, Brazil. & basilio. dsb @ gmail. com; https: // orcid. org / 0000 - 0003 - 3556 - 5880 basilio.dsb@gmail.com Author Mise, Kleber Makoto 0000-0003-4391-9589 Laboratório de Sistemática e Bioecologia de Coleoptera, Departamento de Zoologia, Universidade Federal do Paraná, Caixa Postal 19020, 81531 - 980, Curitiba, Paraná, Brazil. & klebermise @ yahoo. com. br; https: // orcid. org / 0000 - 0003 - 4391 - 9589 klebermise@yahoo.com.br Author Frisch, Johannes Museum für Naturkunde Berlin, Invalidenstrasse 43, 10115 Berlin, Germany. Author Almeida, Lúcia Massutti De 0000-0003-4277-711X Laboratório de Sistemática e Bioecologia de Coleoptera, Departamento de Zoologia, Universidade Federal do Paraná, Caixa Postal 19020, 81531 - 980, Curitiba, Paraná, Brazil. & lalmeida @ ufpr. br; https: // orcid. org / 0000 - 0003 - 4277 - 711 X lalmeida@ufpr.br text Zootaxa 2021 2021-02-25 4938 1 1 59 journal article 7835 10.11646/zootaxa.4938.1.1 045b347a-4a5b-474f-b69f-1cd3fedf7678 1175-5326 4561258 074E95CD-E7C0-4098-93F0-70DE03CAD0D0 Liogenys obscura Blanchard, 1851 Figs. 15 ; 24 . Liogenys obscurus Blanchard, 1851: 167 ; Lacordaire 1855: 269 (systematics); Harold 1869: 1140 (checklist); Steinheil 1874: 557 (checklist); Kolbe 1907: 5 (checklist); Bruch 1911: 200 (checklist); Dalla Torre 1913: 318 (checklist); Frey 1969: 43 (key); Krajčík 2012: 145 (checklist). Liogenys obscura : Blackwelder 1944: 227 (checklist); Evans 2003: 211 (checklist); Evans & Smith 2009: 180 (checklist). Liogenys bruchi Moser, 1924: 122 ; Blackwelder 1944: 227 (checklist); Frey 1969: 58 (synonymy). Type material . Liogenys obscurus female lectotype here designated ( MNHN ): [green handwritten] “ L. obscurus / Cat. Mus. / Rio negro (Patagonie) / M. D’ Orbigny”; [white handwritten] “6049 / 34”, [white handwritten] “1050”, [light green typeset and handwritten] “MUSÉUM PARIS / Chiquitos d’Orbigny”, [white, outlined black, typeset] “Southern Neotropical Scarabs / database # AS 2615205 / Liogenys obscura / Blanchard, 1851 ♀ / DET: A.B.T.SMITH 2008”, [red, outlined black, typeset and handwritten] “ LIOGENYS / OBSCURA / BLANCHARD, 1851 / LECTOTYPE / Des. Cherman M. A. Paralectotypes (2): one female ( MNHN ): [white handwritten] “6049 / 34”, [white typeset] “MUSEUM PARIS / PATAGONIE / (PATAGONES) / D’ORBIGNY 1834”, [white, outlined black, handwritten and typeset] “ Liogenys / obscurus / DET. / L. W. SAYLOR”, [white, outlined black, typeset] “Southern Neotropical Scarabs / database # AS 2615206 / Liogenys obscura / Blanchard, 1851 ♀ / DET: A.B.T.SMITH 2008”; one female ( MNHN ): [white handwritten] “6049 / 34”, [white typeset and handwritten] “MUSÉUM PARIS / Chiquilos / d’Orbigny”, [white, outlined black, typeset] “Southern Neotropical Scarabs / database # AS 2615207 / Liogenys obscura / Blanchard, 1851 ♀ / DET: A.B.T.SMITH 2008”. Liogenys bruchi Moser male lectotype here designated : [white handwritten] “ Liogenys / bruchi / Moser / Typen”, [white, typeset and handwritten] “Alta Gracia La Granja / Sierras de Córdoba / IX.922 [typeset] C. Bruch Leg”, [white, typeset and handwritten] “ Liogenys / obscurus Bl / det. G. Frey, 1968”, [red typeset] “Typus” ( ZMHB ), [white, outlined red, typeset] “ LECTOTYPE / Liogenys bruchi / Moser, 1924 / des. M. A. Cherman” ( ZMHB ). Paralectotypes (2): one male ( MACN ): [white, typeset and handwritten] “Alta Gracia La Granja / Sierras de Córdoba / XII.921 / C. Bruch Leg.”, [red handwritten] “ Liogenys / bruchi / Moser 1924 / Syntypus ?”, [green typeset] “Typus”, [white handwritten] “FICHADO”, [white, outlined black, typeset] “MACN–En / 952”, [white, outlined red, typeset] “ PARALECTOTYPE / Liogenys bruchi / Moser, 1924 / Des. M. A. Cherman”. One male ( MACN ): [white, typeset and handwritten] “Alta Gracia La Granja / Sierras de Córdoba I.922 / C. Bruch Leg”, [red handwritten] “ Liogenys / bruchi / Moser 1924 / Syntypus ?”, [green typeset] “Cotypus”, [white handwritten] “FICHADO”, [white, outlined black, typeset] “MACN –En / 953”, [white, outlined red, typeset] “ PARALECTOTYPE / Liogenys bruchi / Moser, 1924 / Des. M. A. Cherman”. Non-type material (65). ARGENTINA . Without locality and collector, 1944, 1 female ( MZSP ) ; Catamarca : Anacasti , 18.XII. 2009 , 573 m, 28º52’57’’S 65º25’04’’W , Ocampo , Dominguez , & Campon , 1 male and 2 females ( IADIZA ) ; Pomán ( Camping ), 7.XII.2013 , Arriagada & Castillo , 1 female ( CMVD ) ; Santiago del Estero : Río Salado, without date, E.R. Wagner , 1 male ( MZUC ) ; Córdoba : Cruz del Eje ( 4 km NE), 20.II.1982 , A. Martínez , 3 males and 20 females ( CMNC ) ; Capilla del Monte. Punilla , 21.XI.1965 , A. Martínez , 1 male and 1 female ( CMNC ) ; 3.XII.1997 , G. Arriagada , 2 males and 2 females ( CMVD ) ; Diquecito , II.1977 , A. Martínez , 1 male ( CMNC ) ; Diquecito. El Sauce , XII.1964 , A. Martínez , 3 males ( MZSP ) ; Río Cuarto ( 45 mi N), 11.VII.1951 , Ross & Michelbacher, 1 male ( MZSP ) ; without date, Bremer , 2 females ( ZMHB ) ; San Vicente , without date, Frenzel , 1 female ( ZMHB ) ; San Luis : La Toma , km 73, Toll Autopista El Saladillo , 33,0715633ºS 65,654522ºW , 23.XII.2012 , M.A. Cherman , 2 females ( DZUP ) ; Desaguadero , 15.I.2001 , J. Jensen , 2 females ( CMVD ) ; Quines , 24.XI.1995 , Roig & Flores , 2 males and 1 female ( IADIZA ) ; El Molle. Departamento Belgrano , 33º02’22.8’’S 66º30’47.6’’W , 7.II. 2017 , 622 m, G. Arriagada , 1 male and 7 females ( CEMT ) ; Mendoza : Telteca. Lavalle , 32º22’59.58’’S 68º03’14.16’’W , 5.II. 2008 , 548 m, Ocampo , Ruiz , & San Blas , 1 female ( IADIZA ) ; Buenos Aires : Solá , II.1961 , A. Martínez , 1 female ( MZSP ) ; Base Naval Puerto Belgrano , Punta Alta , [ 38.883333ºS , 62.083333ºW ], 2.II.1938 , Biraben & Scott , 3 males and 3 females ( MLPA ) ; “ Patagonia ”: without date, Guerin , 1 female ( ZMUC ) . URUGUAY . Colonia : Carmelo, without date, M. Palmer , 1 female ( CMNC ) ; Montevideo : Montevideo , without date and collector, 1 female ( CMNC ) . Diagnosis . Length: 10.9–11.6 mm ; width: 5.5–6.2 mm . Dark brown, shiny, pronotum and elytra unicolored; head and pronotum coarsely and densely punctate ( Fig. 15B ); distance between eyes more than three times the width of one eye; frons swollen and somewhat scaly; clypeal emargination deep, wide and rounded in males, more angulate in females; outer sides of anterior teeth parallel, subparallel in females; outer margin of anterior teeth shorter than the eye; clypeal lateral margin convex, blunt projection, in males sharper ( Fig. 15E ); distance between clypeal lateral projection and anterior margin of eye longer than one eye; distance between clypeal lateral projection and the adjacent anterior tooth equal to the basal width of the anterior tooth; in females obtuse angle between outer side of anterior teeth and clypeal lateral projection ( Fig. 15A ); in males angle obtuse or straight; antenna with 10 antennomeres; pronotal posterior corners rounded; scaly at the insertion with the pterothorax; scutellum rounded to ogival; mesepisternum, sides of metaventrite and metacoxae scaly abundantly ( Fig. 15F ); three protibial teeth, distance between basal and middle teeth slightly longer than between middle and apical; mesotibia quadrate to subquadrate in cross section, two transverse carinae, the apical one incomplete in males, complete in females; metatibial transverse carina present posteriorly; metatarsomere I one half the length of metatarsomere II and equal in width; in males pro and mesotarsomeres I to IV equally enlarged, protarsomere II as wide as it is long; claw bifid, symmetrical, superior tooth of a claw longer than the inferior; band of abundant scales beneath the outer margin of elytra; disc of ventrites scaly and with scattered bristles; pygidium convex, flatter in females; wide, subtrapezoidal; pygidial disc setose throughout, with thick erect bristles ( Fig. 15G ); parameres widened and swollen at the level of their split and narrowed towards the apex, parameral split at 2/3; inner margins straight ( Fig. 15 H–I); parameres in lateral view straight, not coplanar ( Fig. 15J ). FIGURE 15. Liogenys obscura Blanchard, 1851 female lectotype views: A) dorsal, C) labels; L. bruchi Moser, 1921 male lectotype views: B) dorsal, D) labels, E) head and pronotum, F) lateral, G) pygidium, and parameres in views: H) dorsal, I) dorsolateral and J) lateral. Type locality . Liogenys obscura : ARGENTINA , Río Negro (Patagonie); L. bruchi : ARGENTINA , “Alta Gracia La Granja, Sierras de Córdoba ”. Geographical distribution . URUGUAY ( Montevideo , Colonia ); ARGENTINA ( Catamarca, Santiago del Estero , Córdoba, San Luis, Mendoza , Buenos Aires , Río Negro ) . Remarks . The type series specimens of L. bruchi were found at the MACN and ZMHB, although in their labels the date varies: XII.1921 , I.1922 (MACN), and IX.1922 (ZMHB). Moreover, none of them match exactly with the month and/or year stated by Moser (1924) in the original description, which is XI—XII.1922. To maintain the stability of the name we designate the specimen of ZMHB as the lectotype , as this is the only one bearing the original label of type specimen written by Moser ( Fig. 15B, D ).