Liogenys latitarsis Moser 1918
Creators: name: Cherman, Mariana Alejandra
name: Basílio, Daniel Silva
name: Mise, Kleber Makoto
name: Frisch, Johannes
name: Almeida, Lúcia Massutti De
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Melolonthidae
Liogenys
Liogenys latitarsis

description: Liogenys latitarsis Moser, 1918
Figs. 10; 11; 26.
Liogenys latitarsis Moser, 1918: 99; Blackwelder 1944: 227 (checklist); Frey 1969: 50 (key); Frey 1969: 51, 63 (key, redescription [named as L. denticeps]); Evans 2003: 208 (checklist); Krajčík 2012: 145 (checklist); Evans & Smith 2009: 176 (checklist); Cherman et al. 2017: 4 (generic history).
Type material. Liogenys latitarsis male lectotype here designated (ZMHB): [white, outlined black, typeset] “ Argentinien / Santiago del Estero ”, [white handwritten] “ Liogenys / latitarsis / Mos / Typen ♂”, [light red typeset] “Typus”, [white handwritten] “latitarsis / Mos.”, [white, outlined red, typeset and handwritten] “ LIOGENYS / LATITARSIS / Moser, 1918 / LECTOTYPE / Des. Cherman M. A.”, genitalia mounted. Paralectotypes (1): one female (ZMHB): with the same data of the lectotype, plus the label: [white, outlined red, typeset and handwritten] “ LIOGENYS / LATITARSIS / Moser, 1918 / PARALECTOTYPE / Des. Cherman M. A.”.
Non-type material (36). BOLIVIA. Santa Cruz: Caballero, ~ 9 km SW Comarapa, 17º58.926’S 64º34.365’W, XII.2008, 1694 m, W.D.E. Edmonds & T. Vidaurre, [collected in] human feces, 6 males (CEMT); Cochabamba: Cochabamba, Bolivia Andina, Zischka, 1.XII.1969, 1 male; 10.I.1960, 1 female (NHMB). PARAGUAY. Boquerón: Chaco, Teniente Enciso, 4.XI.2001, C. Aguilar J., 2 males (CMVD); Parque Nacional Teniente Inciso, administración, 21º12’S 61º39’W, 253 m, 18.IX.2003, B. Garcete, 3 males and 1 female (DZUP). ARGENTINA. Jujuy: Estación Yuto, without date and collector, 1 male (NHMB); Salta: Chaco Occidental, 100 km NE Los Colorados [20 km NE Cafayate], I.1993, M. McLaqughlin & B. Bestelmeyer, 1 male (UNSM); Formosa: Ruta Provincial 39, 23 km S Ingeniero Juárez, 24º05’27’’S 61º56’49’’W, 13–17.XII.2008, F. Ocampo, G. San Blas, & F. Campon, mercury vapor & ultraviolet light trap, 1 male and 1 female (IADIZA); Tucumán: Gobernador Garmendia, 22.I.1981, Roig, 1 male (IADIZA); without locality, date, and collector, 1 male (MLPA); Catamarca: Quiros (2 km S) on Ruta Nacional 157, 28º48’43.3’’S 65º06’22.6’’W, 9.XII. 2008, 305 m, F. Ocampo, G. San Blas, & F. Campon, at light, 1 female (IADIZA); El Peñón, [26.478056°S, 67.265°W], II.1947, 4000 m, A. Martínez, 1 female (CMNC); Ciudad de Catamarca, XI.1945, J. Bosq, 1 female (MZUC); Santiago del Estero: Tintina, without collector, X.1946, 1 female (MZUC); Santiago del Estero: Tintina, without collector, XI.1946, 1 male and 2 females (MZUC); Fernandez, XII.1935, J. Bosq, 2 males (MLPA); El Pinto, without date and collector, 1 female (NHMB); Mendoza: Santa Rosa, Reserva Biológica Ñancuñan, 10–15.III.2014, G. Arriagada, at light, 1 female (CMVD); 11–13.XII.2002, V.M. Dieguez, 1 male (CMVD); Reserva Biológica Ñancuñan, Médanos, 34º00’12’’S 67º55’08’’W, 4.II. 2006, 569 m, F.C. Ocampo, E. Ruiz, & G. Zalazar, at light, 2 males and 2 females (DZUP). URUGUAY. Montevideo: SAPar Labo Nº288 [34°53’01’’S 056°10’55’’W?], without collector, 1 male (USNM).
Diagnosis. Body elongate, brownish to dark brown, elytra shiny to semiopaque (Fig. 10A); clypeal emargination deep but not reaching the base of the teeth, rounded and wide; clypeal lateral margin strongly convex and produced, forming a tooth-like projection; pronotal posterior corners rounded to subangulate (Fig. 10C); the first pair of elytral ridges more defined than the other three, sometimes the second pair also noticeable; basal apophysis of metacoxa produced; metafemur with scattered bristles; metatibia not carinate along the inner margin (Fig. 10D); pygidium convex, wider than it is long; pygidial width wider than the distance between spiracles of propygidium, disc with bristles throughout, erect bristles (Fig. 10E); in males protarsomeres and mesotarsomeres strongly enlarged, metatarsomeres slightly enlarged; parameres expanded after the midline towards the apex (Fig. 10F); outer margin dentate, undulate or straight (Fig. 11 A–E); parameres strongly convex in lateral view (Fig. 10G).
Redescription. Length 8.0– 11.9 mm; width: 4.1–6.2 mm. Light brown to brown. Head: distance between eyes twice the width of one eye; clypeal emargination deep, rounded and wide; outer sides of anterior teeth parallel; outer margin of anterior teeth shorter than the eye; lateral margin convex and produced, forming a tooth-like projection; distance between clypeal lateral projection and anterior margin of eye slightly longer than one eye; distance between clypeal lateral projection and apex of the adjacent anterior tooth equal to the basal width of anterior tooth; angle acute or approximately 90º between outer side of anterior teeth and clypeal lateral projection; distal maxillary palpomere, maximum width almost twice the apical width; fovea deep, extending past the transverse midline of the palpomere; antenna with 10 antennomeres, club lighter in color and equal to the funicle. Thorax: anterior margin of pronotum slightly produced medially; glabrous, punctures coarse and sparse, denser and coarser towards the anterior margin; pronotal posterior corners rounded to subangulate; hypomere with long bristles near the outer margin and scales near the inner margin; mesepisternum scaly; sides of metaventrite scaly and with bristles; distance between mesocoxae and metacoxae longer than the length of the metacoxa; scutellum ogival, weakly punctate at the base or sides. Elytra: shiny to semiopaque, glabrous, light brown to dark brown; elytral suture slightly darker than elytron, weakly elevated; first pair of ridges more defined than the other three, sometimes the second pair also noticeable. Legs: three protibial teeth, the middle and apical equal in size, basal one slightly shorter; distance between basal and middle teeth slightly longer than between middle and apical; mesofemural surface setose; mesotibia subquadrate in cross section, surface coarsely sculptured; two transverse carinae, the apical carina incomplete or complete in males, always complete in females; metacoxa scaly; basal apophysis of metacoxa produced; metafemur with scattered bristles; metatibia not carinate along the inner margin, apical inner surface setose; strong metatibial transverse carinae present posteriorly; metatibial apical spurs of different lengths; the larger longer than the diameter of the tibial apex; in males tarsomeres I to IV enlarged in all legs; protarsomeres and mesotarsomeres strongly enlarged, metatarsomeres slightly enlarged; protarsomere II as long as it is wide; metatarsomere I twice shorter than metatarsomere II; claw bifid, symmetrical, superior tooth of a claw less than twice as long and as wide as the inferior tooth, distance between teeth equal to the length of the inferior tooth. Abdomen: ventrites abundantly with bristles on disc, with scattered bristles in females; propygidium slightly visible, with bristles; pygidium convex; trapezoidal, wide; pygidial width wider than the distance between spiracles of propygidium; pygidial disc with bristles throughout, erect bristles; pygidial apex quadrate to rounded. Parameres: basal region narrower than both sections of the parameres at its maximum width, parameral split at third portion, expanded after the midline towards the apex; outer margin indented (Fig. 11A, D, C, F, H, I), undulate (Fig. 11E, J) or almost straight (Fig. 11B, G); parameres strongly convex in lateral view.
Type locality. ARGENTINA, Santiago del Estero.
Geographical distribution. BOLIVIA (Santa Cruz, Cochabamba); PARAGUAY (Boquerón); ARGENTINA (Jujuy, Salta, Formosa, Tucumán, Catamarca, Santiago del Estero, Mendoza).
Remarks. Liogenys latitarsis is the species with the broadest geographical distribution among the Chacoan Liogenys, here expanded to Bolivia and Paraguay, and intraspecific variations were found among the specimens examined. The varying features are mainly the presence and the amount of bristles at the clypeus; somewhat in the sharpness of the anterior clypeal teeth; the posterior corners of pronotum from rounded to subangle; the more or less elevated inner pair of elytral ridges; elytra shiny or semiopaque (less frequent); and in the shape of the outer margins of the parameres. Liogenys latitarsis strongly resembles externally L. vicina Frey, 1969 (Fig. 22) (for more details see L. vicina diagnosis).
description: Published as part of Cherman, Mariana Alejandra, Basílio, Daniel Silva, Mise, Kleber Makoto, Frisch, Johannes & Almeida, Lúcia Massutti De, 2021, Liogenys Guérin-Méneville, 1831 (Coleoptera: Scarabaeidae: Melolonthinae Diplotaxini) from the Chacoan Province and its boundaries: taxonomic overview with four new species, pp. 1-59 in Zootaxa 4938 (1) on pages 23-27, DOI: 10.11646/zootaxa.4938.1.1, http://zenodo.org/record/4561258