Liogenys cartwrighti Frey, 1969

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, Zootaxa 4938 (1), pp. 1-59 : 6-8

Liogenys cartwrighti Frey, 1969

Figs. 2 ; 26 .

Liogenys cartwrighti Frey, 1969: 57 ; Evans 2003: 207 (checklist); Evans & Smith 2009: 176 (checklist); Krajčík 2012: 144 (checklist); Cherman et al. 2017: 5, 20 (generic history, natural history).

Type material. Liogenys cartwrighti male holotype ( USNM): [white handwritten] “Sgo. d. Estero / Argentinien ”, [white, typeset and handwritten] “ Liogenys / cartwrighti / n.sp. / Type / det. G Frey, 1968”, [red typeset] “TYPUS”, [pink typeset] “ Cartwright / Smithson.”, [red, typeset and handwritten] “ Type No / 74011 / USNM”, [white typeset] “ Loan from / USNMNH / 2065060”. Paratypes (2): one female paratype ( NHMB) [white handwritten] “ Salta / Dep. Rivadavia / XII.950 Daguerre ”, [orange empty], [white typeset] “ ♀ ”, [pink typeset] “Property / USNM”, [red typeset] “ PARATYPE ”, [white typeset and handwritten] “ Liogenys / cartwrighti / n.sp. / det. G. Frey, 1968”, [white typeset] “Museum Frey / M̹nchen”. One female paratype ( NHMB) [white handwritten] “ Salta / Dep. Rivadavia”, [white typeset] “ ♀ ”, [pink typeset] “Cartwrighti / Smithson.”, [red typeset] “ PARATYPE ”, [white, typeset and handwritten] “ Liogenys / cartwrighti / n.sp. / det. G. Frey, 1968” .

Non-type material (12). ARGENTINA: Jujuy: without locality and date, R. Richter 1 male and one female ( MLPA) ; Los Perales , I.1951, F. Justus Jor., 1 female ( DZUP) ; Parque Nacional Calilegua , 29.XI.1986, J. Muzón, 1 male ( IADIZA) ; near Parque Nacional Calilegua , 10.XII.2008, F.C. Ocampo, G. San Blas, & F. Campón, 1 male ( IADIZA) ; Dique la Ciénaga , III.1953, A. Martínez, 1 male ( MZSP) ; Salta: Orán , 11–12.X.1968, L. Peña, 2 males ( NHMB) ; Dique Itiyuro- 5 km Salvador Mazza [22.0509ºS, 63.7101ºW], 15.XI.1995, S. Flores & S. Roig, 1 male ( IADIZA) ; 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. Campón, mercury vapor & ultraviolet light trap, 1 male ( IADIZA) ; Tucumán: Lules , XII.1957, A. Martínez, 1 male ( MZSP) ; Santiago del Estero: Ojo de Agua , III.1969, A. Martínez, 1 male ( CMNC) .

Diagnosis. Body elongate, brown to dark brown, shiny ( Fig. 2A ); clypeal emargination deep but not reaching the base of the teeth, rounded and wide; lateral margin strongly convex and produced, forming a tooth-like projection; pronotal posterior corners in obtuse angle ( Fig. 2B ); basal apophysis of metacoxa produced; metatibia weakly or not carinate along the inner margin; superior tooth of a tarsal claw slightly longer than the inferior, distance between teeth shorter than the inferior tooth; pygidium with sparse bristles throughout ( Fig. 2 D–E); ventrites with abundant bristles ( Fig. 2C ); in males protarsomere II as long as it is wide; parameres lyre shaped; ventral surface visible in dorsal view, concave ( Fig. 2F ).

Redescription. Length 9.4–12.3 mm; width: 4.4–5.9 mm. Dark brown. Head: distance between eyes twice as wide as 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 strongly convex and produced, forming a tooth-like projection; distance between clypeal lateral projection and anterior margin of the eye as long as one eye; distance between clypeal lateral projection and apex of the adjacent anterior tooth longer than the basal width of the anterior tooth; acute angle between outer side of anterior teeth and clypeal lateral projection; distal maxillary palpomere, maximum width twice the apical width; fovea shallow, extending past the transverse midline of the palpomere; antenna with 10 antennomeres, club lighter in color and longer than the funicle in males, as long as in females. Thorax: anterior margin of pronotum straight; glabrous, punctures fine and very sparse, denser and coarser near the anterior margin; pronotal posterior corners in obtuse angle; hypomere with long bristles, scales near the inner margin; mesepisternum scaly; sides of metaventrite with brisltes and scales; distance between mesocoxae and metacoxae slightly longer than the length of the metacoxa; scutellum ogival, weakly punctate at the sides. Elytra: shiny, glabrous, brown or dark brown; elytral suture and elytron unicolored, weakly elevated; all elytral ridges weakly defined. 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 or quadrate in cross-section, surface coarsely sculptured; two transverse carinae, the apical one incomplete in males and complete in females; metacoxa scaly, scales long; basal apophysis of metacoxa produced; metatibia not carinate along the inner margin, apical inner surface setose; metatibial transverse carinae present posteriorly; metatibial apical spurs of different lengths; the larger longer than the diameter of the tibial apex; in males protarsomeres and mesotarsomeres I to IV strongly enlarged; metatarsomeres slightly enlarged; protarsomere II as long as it is wide; metatarsomere I two times shorter than metatarsomere II; claw bifid, symmetrical, superior tooth of a claw slightly longer than the inferior and equal in width, distance between teeth shorter than the inferior tooth. Abdomen: ventrites with abundant bristles on disc; propygidium slightly visible, with bristles; pygidium more or less convex; subquadrate, as wide as it is long; pygidial width equal in distance or slightly wider than the distance between spiracles of propygidium; pygidial disc with sparse bristles throughout; pygidial apex quadrate. Parameres: basal region narrower than both sections of the parameres at its maximum width, parameral split at 2/3, lyre shaped; ventral surface seen from dorsal view, concave; parameres convex in lateral view ( Fig. 2G ).

Type locality. ARGENTINA, Santiago del Estero .

Geographical distribution. ARGENTINA (Jujuy, Salta, Formosa, Tucumán, Santiago del Estero) .

Remarks. Liogenys cartwrighti is similar to L. denticeps Blanchard, 1851 ( Fig. 5 ) in the body size and color and in the clypeus and pygidium in shape. Liogenys cartwrighti differs from L. denticeps (in parenthesis) by the obtuse (rouded) pronotal posterior corners; pronotum and elytra finely punctate (coarsely); pygidium with bristles throughout (glabrous); males with protarsomeres and mesotarsomeres strongly enlarged (slightly wider than the metatarsomeres); and in the different shape of the parameres ( Figs. 2F, G ; 5K, L ). After examining the specimen at NHMB, from which Frey (1969) had drawn the genitalia of L. denticulata Moser, 1918 (sensu Frey 1969), we realized that it is a misidentified specimen of L. cartwrighti . Frey (1969) mentioned “ Salta, Rivadavia” [ Argentina] as the type locality of the complete series, and that the type [holotype] is deposited at the USNM. The paratypes examined at NHMB match with this locality, but the holotype at the USNM bears “ Santiago del Estero ” [ Argentina]. As this type specimen bears all the original labels of Frey, we confirm that Santiago del Estero is the type locality of L. cartwrighti , and not Salta.

Besides the Chacoan region, L. cartwrighti can be also found at the Yungas Province, in sympatry with L. denticeps and their similar species L. latitarsis Moser, 1918 .

Figures

FIGURE 2. Liogenys cartwrighti Frey, 1969 male views: A) dorsal, B) head and pronotum, C) lateral, D) pygidium, E) female pygidium, and parameres in views: F) dorsal, and G) lateral.

FIGURE 5. Liogenys denticeps Blanchard, 1851 female lectotype views: C) dorsal, F) labels, I) pygidium; L. denticulata Moser, 1918 male lectotype: A) dorsal, D) labels, G) pygidium, J) lateral, and parameres views: K) dorsal and L) lateral; L. denticulata female paralectotype views: B) dorsal, E) labels.

FIGURE 26. Geographical distribution of four known Liogenys species occurring in the Chacoan province and its boundaries. Shaped points: previously known species; colors: Neotropical provinces (Morrone 2014) and Monte province from the South American Transition Zone (Roig-Juñent et al. 2018).