A taxonomic revision of Liogenys occurring in Brazil with an interactive key and remarks on New World Diplotaxini (Coleoptera, Melolonthidae) Author Cherman, Mariana Alejandra Author Mise, Kleber Makoto Author Moron †, Miguel Angel Author Vaz-de-Mello, Fernando Z. Author Almeida, Lucia Massutti de text ZooKeys 2017 699 1 120 http://dx.doi.org/10.3897/zookeys.699.12031 journal article http://dx.doi.org/10.3897/zookeys.699.12031 1313-2970-699-1 0F92401F3F7C4896AD9D72BC84348C7D 0F92401F3F7C4896AD9D72BC84348C7D Liogenys pallidicornis Blanchard, 1851 Figs 67, 89 Liogenys pallidicornis Blanchard, 1851: 167 (orig. desc.); Lacordaire 1856 : 269 (sys.); Harold 1869a : 1140 (check.); Dalla Torre 1913 : 318 (check.); Blackwelder 1944 : 227; Evans 2003 : 212 (check.); Evans and Smith 2005 : 176 (check.); Evans and Smith 2009 : 180 (check.) Type material. Liogenys pallidicornis male syntype (MNHN): [white handwritten] "Capite/des Mines", [green handwritten] " Liogenys pallidicornis ./Cat. Mus./ Bresil /M. A . St. Hilaire", [light green printed] "MUSEUM PARIS. [handwritten] Cap. des/Mines", [red printed] "SYNTYPE" . Genitalia mounted. This type is here designated the lectotype [white, outlined in red, printed] "LECTOTYPE/ Liogenys pallidicornis / Blanchard 1851 /des. M. A. Cherman 2014". Male syntype (MNHN): [white handwritten] "Capite/des Mines", [green handwritten] " Liogenys pallidicornis ./Cat. Mus./ Bresil /M. A. St. Hilaire", [light green printed] "MUSEUM PARIS. [handwritten] Cap. des/Mines", [red printed] "SYNTYPE" . This type is here designated the paralectotype: [white, outlined in red, printed] "PARALECTOTYPE/ Liogenys pallidicornis / Blanchard 1851 /des. M. A. Cherman 2014". Non-type material. BRAZIL. Without locality, date and collector, 4 ex. (ZMHB); CE: without date and collector, 2 ex. (ZMHB); Ubajara, "P.N. Portao Neblina", 3°50'35.5"S , 40°54'1"W , 16/II/2013, 850 m, Vaz-de-Mello and Grossi col., 1 ex. (CEMT); "Nordeste" , without date and collector, 2 ex. (CEMT); RN: Jardim de Angicos, I/1952, M. Alvarenga, 1 ex. (DZUP); Natal, XII/1956, A.F. Magalhaes col., 1 ex. (DZUP); 2 ex. (MNRJ); Mossoro , I/1952, M. Alvarenga col., 4 ex. (DZUP); SE: Caninde do Sao Francisco, "Faz. Miramar", 11/III/2000, L. Iannuzzi col., 1 ex. (CEMT); BA: Jacobina, XII/1941, Mangabeira col., 2 ex. (CMNC). ARGENTINA. Chaco austral, without date, C. Bruch col., 1 ex. (MLPA). Diagnosis. Body, pronotum and elytra purplish brown or dark brown; elongate; distance between eyes more than twice the width of one eye; frons longer than clypeus; clypeal emargination sub-angled, shallow and narrow; clypeal lateral margin convex ; pronotal posterior corners sharp, obtuse-angled; prothorax scaly posteriorly; pro-, meso- and metasternum, pro- and metacoxae scaly abundantly; male mesotibia sub-quadrate in cross section; protarsal claws symmetrical; basal metatarsomere shorter than tarsomere II and slightly wider; pygidium flat or convex and wide, pygidial width exceeding distance between spiracles of propygidium; total length of parameres more than five times the length of their apex, narrowed subapically; inner margins convergent; apex harpoon-like with lateral angle curved projecting almost perpendicular to parameres (Fig. 67F). Figure 67. Liogenys pallidicornis Blanchard. A Dorsal view B Lateral view C Frontal view D Clypeus and pronotum E Pygidium F Parameres, dorsal view G Parameres, lateral view. Redescription. Length: 11.0-13.0 mm; width: 6.1-7.2 mm. Purplish brown. Head: distance between eyes more than twice the width of one eye; frons longer than clypeus; clypeal emargination sub-angled, shallow and narrow; outer sides of anterior teeth follow the lateral margin of clypeus; canthus not exceeding the outer margin of the eye; distal maxillary palpomere, maximum width twice the width of apex; fovea shallow and oval, extending past the transverse midline of the palpomere; labium transversely carinated, as wide as it is long; antenna 10-articulated, lamellae lighter in color than flagellum and equal in length. Thorax: anterior margin of pronotum straight, flanged throughout; maximum length of pronotum exceeding the length of tarsomeres I, II and III together; pronotal disc glabrous, punctures dense and fine, smooth at the posterior longitudinal midline; pronotal posterior corners sharp, obtuse-angled; prothorax scaly posteriorly, abundant scales; proepisternum with long bristles; mesepisternum scaly, as are the sides of metasternum, also with few long bristles on the anterior margin; distance between meso- and metacoxae up to twice longer than the metacoxa; scutellum triangular, smooth. Elytra: shiny, glabrous, uniform dark brown to purplish; elytra more than three times longer than the pronotum; elytral suture and elytron unicolored and elevated; four elytral ridges barely noticeable. Legs: procoxa scaly on infra-carinal and outer surface; punctures visible at 12 x magnification; three protibial teeth, middle and apical equal in size, in males the three teeth equally spaced, in females distance between basal and middle teeth longer than between middle and apical; protibial inner apical spur present; mesofemural disc glabrous, with a row of long bristles on the anterior margin; mesotibia sub-quadrate in cross section in males, cylindrical in females, disc finely sculptured, two mesotibial transverse carinae, the apical one complete; basal apophysis of metacoxa produced beyond the outer margin of trochanter; metatibial apical spurs of different lengths, the longest equal in length to the diameter of the tibial apex, inner margin of male metatibia carinated towards apex, apical inner surface setose; metatibial disc finely sculptured in males, coarsely in females; two metatibial transverse carinae present posteriorly; basal metatarsomere smaller and slightly wider than tarsomere II, in males protarsomere II long; pro- and mesotarsomeres I to IV enlarged, protarsomeres slightly wider than the mesotarsomeres and more than twice as wide as metatarsi; claw bifid, symmetrical, superior and inferior tooth equal in length and wider; distance between teeth shorter than the inferior tooth. Abdomen: band of abundant scales visible at the lowest magnification beneath the outer margin of elytra; ventrites bristled on disc and sides, on sides also scaly; propygidium visible, glabrous; pygidium flat or convex, sub-quadrate, wide; pygidial width exceeding distance between spiracles of propygid ium ; pygidial disc bristled only on apex, with long bristles; finely punctured; pygidial apex quadrate or sub-quadrate. Parameres: width of basal region equal to the parameres together at its maximum width, parameral split at 2/3; total length of parameres more than five times the length of their apex; inner margins convergent; narrowed sub-apically; apex harpoon-like with lateral angle curved projecting almost perpendicular to parameres (Fig. 67F). In lateral view parameres convex (Fig. 67G). Type-locality. BRAZIL. "Capit.e des Mines" [today Minas Gerais state]. Geographical distribution. BRAZIL (CE, RN, SE, MG, BA); ARGENTINA ("Chaco Austral"). Remarks. Liogenys pallidicornis resembles L. fusca (Fig. 64) and L. bidentata (Fig. 57) and differs from them in the shape of the clypeus being not produced laterally; scutellum smooth; and parameres being narrowed sub-apically, the shape of the apex is distinctive and parameres convex in lateral view. Liogenys pallidicornis is the sister lineage of L. bidentata ( Cherman et al. 2016 ) and differs in the fovea of the distal maxillary palpomere being shallower and narrower, metatibial disc finely sculptured; metatarsomere I slightly wider than tarsomere II and pygidium convex.