Liogenys nigrofuscus Moser, 1918: 103 Frey 1969: 50 Krajčík 2012: 145 Cherman et al. 2017: 4 Liogenys nigrofusca : Blackwelder 1944: 227 Evans 2003: 211 Evans & Smith 2009: 179 Liogenys longicrus Moser, 1918: 100 Frey 1965: 145 Liogenys longicra : Blackwelder 1944: 227 Liogenys Guérin-Méneville, 1831 (Coleoptera: Scarabaeidae: Melolonthinae Diplotaxini) from the Chacoan Province and its boundaries: taxonomic overview with four new species Cherman, Mariana Alejandra Basílio, Daniel Silva Mise, Kleber Makoto Frisch, Johannes Almeida, Lúcia Massutti De Zootaxa 2021 2021-02-25 4938 1 1 59 Moser, 1918 Moser 1918 [151,556,1795,1822] Insecta Melolonthidae Liogenys Animalia Coleoptera 30 31 Arthropoda species nigrofusca   Figs. 14; 24.      Liogenys nigrofuscus Moser, 1918: 103;  Frey 1969: 50(key);  Krajčík 2012: 145(checklist);  Cherman et al.2017: 4(generic history).     Liogenys nigrofusca: Blackwelder 1944: 227(checklist);  Evans 2003: 211(checklist);  Evans & Smith 2009: 179(checklist).     Liogenys longicrus Moser, 1918: 100;  Frey 1965: 145(synonymy).     Liogenys longicra: Blackwelder 1944: 227(checklist).   Type material.  Liogenys nigrofuscus male holotype( ZMHB): [white, typeset and handwritten] “ Argentinien/ Gran Chaco”, [white handwritten] “ Liogenys/ nigrofuscus / Typen Mos”, [red typeset] “ Typus”, [white typeset] “ Liogenys/ nigrofuscus / Mos.”   Liogenys longicrus male holotype( ZMHB): [white typeset] “ Argentinien/ Santiago del Estero”, [white handwritten] “ Liogenys/ longicrus / Typen Mos”, [red typeset] “ Typus”, [white handwritten] “ Liogenys/ nigrofuscus / Mos. [typeset] det. G. Frey 1964”  Non-type material(10).  PARAGUAY. Boquerón: Colonia Menonitas,  VII.1945, Podtiaguin 2 males( MZUC);  Guachalla, A. Pilcomayo,  23.VIII.1945, P. Willim, 1 male( MZUC).  ARGENTINA. Salta: Viñaco(  15 kmElCarril),  12.II.1982, H. Howden, 1 female( CMNC);  Coronel Moldes,  XII.1958, A. Martínez, 1 female( MZSP);  Chaco: Pampa del Infierno[ 26º31’S, 61º10’W],  IX.1982, A. Martínez, 1 female( CMNC);  Estación San Francisco, Departamento San Fernando,  16–17.X.2013, 54 m, 27°30’35.90’’S, 59°4’47.60’’W, M. Ibarra Polesel, 1 specimen;  Antequera, Departamento Primero de Mayo,  22.XII.2014, 52 m, 27°26.500’S, 58°51.459’W, M. Ibarra Polesel, 1 specimen(CARTROUNNE);  Santiago del Estero: El Pinto, without date and collector, 2 females( NHMB).   Diagnosis. Length: 9.1–10.0 mm; width: 4.1–4.8 mm. Body and elytra dark brown, elongate, shiny, sides parallel; pronotum and elytra unicolored, head darker; elytra glabrous ( Fig. 14A); pronotum roughly punctate; frons somewhat swollen and depressed medially in females; clypeal emargination deep, rounded and narrow; outer sides of anterior teeth parallel; teeth sharp; clypeal lateral margin bearing a sharp tooth-like projection, angle between this projection and the anterior teeth approximately 90º; antennae with 10 antennomeres; pronotal posterior corners rounded ( Fig. 14B); hypomere, mesepisternum, sides of metaventrite, metacoxae and sides of ventrites with sparse long bristles ( Fig. 14C); protibial teeth, distance between medial and apical shorter than basal and medial; mesotibia cylindrical in cross section; two strong transverse carinae posteriorly, the basal sloped, the apical complete; pygidium flat; quadrate; pygidial disc very coarsely and densely punctate, sparser in females; with bristles throughout, bristles erect, long ( Fig. 14D); in males, inner margin of metatibia strongly carinate straight towards the apex, somewhat curved outwards ( Fig. 14C); protarsomere II elongate; parameres narrowed medially; parameral split at the midline; apex club shaped and strongly truncate on upper margin ( Fig. 14E); parameres in lateral view convex, not coplanar ( Fig. 14F).    Typelocality.  Liogenys nigrofusca: ARGENTINA, “Gran Chaco”;  L. longicra: ARGENTINA, Santiago del Estero.  Geographical distribution.  PARAGUAY( Boquerón); ARGENTINA ( Salta, Chaco, Santiago del Estero).   Remarks. Frey (1965)synonymized  L. nigrofuscawith  L. longicra, and compared this species with the preceding one in order of description,  L. parallela Frey, 1965( Fig. 18). According to Frey (1965), both are almost undistinguishable but the parameres. Although  L. nigrofuscaresembles  L. parallelain the body size and in the shape of the clypeus, especially in females, they have external differences. This species differs from  L. parallela(in parenthesis) mainly in the color darker, basal transverse carina on the posterior margin of mesotibia and metatibia strong and sloped (basal transverse carina less marked and straight on mesotibia, absent on metatibia); and in the pygidium quadrate, with punctures on disc coarser and uniformly disposed. 3047558467 ZMHB Argentina Gran Typus Typen Mos 32 33 1 Chaco holotype 3047558428 ZMHB Argentina Typus Typen Mos 32 33 1 Santiago del Estero holotype 3047558432 [483,1432,366,393] 1945-07 MZUC Podtiaguin Paraguay Colonia Menonitas 32 33 2 2 Boqueron 3047558316 [151,918,402,429] 1945-08-23 MZUC Guachalla, A & P. Willim Paraguay Pilcomayo 32 33 1 1 Boqueron 3047558311 1982-02-12 CMNC H. Howden Argentina Vinaco 32 33 1 1 Salta 3047558455 [690,1346,438,465] 1958-12 MZSP A. Martinez Argentina Coronel Moldes 32 33 1 1 Salta 3047558479 1982-09 CMNC A. Martinez Argentina -26.516666 Pampa del Infierno 1241 -61.166668 32 33 1 1 Chaco 3047558367 2013-10-16 2013-10-17 2013-10-16 M. Ibarra Polesel Argentina -27.509972 San Fernando 1 -59.079887 Estacion San Francisco 32 33 1 Chaco 3047558374 2014-12-22 M. Ibarra Polesel Argentina -27.441668 Departamento Primero de Mayo 1 -58.85765 Antequera 32 33 1 Chaco 3047558353 [487,1350,582,609] NHMB El Pinto Argentina Santiago del Estero 32 33 2 2 Santiago del Estero