Liogenys opacicollis Fairmaire, 1892

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 : 36-39

publication ID

https://doi.org/ 10.11646/zootaxa.4938.1.1

publication LSID

lsid:zoobank.org:pub:074E95CD-E7C0-4098-93F0-70DE03CAD0D0

DOI

https://doi.org/10.5281/zenodo.4590938

persistent identifier

https://treatment.plazi.org/id/CD475E66-EC26-5A5A-6BBF-1E7AFB04FD38

treatment provided by

Plazi

scientific name

Liogenys opacicollis Fairmaire, 1892
status

 

Liogenys opacicollis Fairmaire, 1892

Figs. 16 View FIGURE 16 ; 23 View FIGURE 23 .

Liogenys opacicollis Fairmaire, 1892: 243 ; Dalla Torre 1913: 318 (checklist); Moser 1921: 140 ( L. densicollis original description); Blackwelder 1944: 227 (checklist); Frey 1969: 39, 53 (key, systematics); Krajčík 2012: 145 (checklist); Evans 2003: 212 (checklist); Evans & Smith 2009: 180 (checklist).

Liogenys densicollis Moser, 1921: 140 ; Blackwelder 1944: 227 (checklist); Frey 1969: 38–39 (key); Krajčík 2012: 144 (checklist); Evans 2003: 208 (checklist); Evans & smith 2009: 176 (checklist). New synonym.

Type material. Liogenys opacicollis female lectotype here designated ( MNHN): [white typeset] “MUSÉUM PARIS / 1906 / Coll. Léon FAIRMAIRE”, [white handwritten] “ Liogenys / opacicollis / Fairm / Rioja / Planta ”, [red, outlined black, handwritten] “ LIOGENYS / OPACICOLLIS / FAIRMAIRE ♀ / [typeset] LECTOTYPE / des. M. A. Cherman ” .

Liogenys densicollis male lectotype here desigated ( ZMHB): [white, outlined black, typeset] “ Argentinien / Santiago del Estero ”, [white handwritten] “ Liogenys / densicollis / Mos / Typen ♂”, [light red typeset] “Typus”, [white typeset] “ Liogenys / densicollis / Mos.”, [red typeset] “ SYNTYPUS / Liogenys / denticulata Moser, 1918 [misspelled] / labelled by MNHUB 2012”, [white, outlined red, typeset] “ LECTOTYPE / Liogenys densicollis / Moser, 1921 / Cherman M. A. 2013”, genitalia mounted. Paralectotypes (10) ( ZMHB): one male with the labels [white typeset] “ Argentinien / Santiago del Estero ”, [white handwritten] “ Liogenys / densicollis / Mos / Typen ♂”, [light red typeset] “Typus”, [white typeset] “ Liogenys / densicollis / Mos.”, [red typeset] “ SYNTYPUS / Liogenys / densicollis Moser, 1921 / labelled by MNHUB 2012”, [white, outlined red, typeset] “ PARALECTOTYPE / Liogenys densicollis / Moser, 1921 / Cherman M. A.” Nine female specimens with the same labels, but instead of: [white handwritten] “ Liogenys / densicollis / Mos / Typen ♂”, the label is: [white handwritten] “ Liogenys / densicollis / Mos / Typen ♀ ”.

Non-type material (81). BOLIVIA. Santa Cruz: Caballero, ~ 9 km SW Comarapa, XII.2008, 1694 m, 17º58.926’S 64º34.365’W, W.D. Edmonds & T. Vidaurre, thorn forest, human feces, 2 males ( CEMT); Samaipata. Bolivia Andina, 25.XI.1959, Zischka, 1 female ( NHMB). ARGENTINA. Salta: Las Tablillas, without date, G.L. Harrington, 1 female ( CASC); Viñaco, 15 km S El Carril, 12.II.1982, H. & A. Howden, 2 females ( CMNC); 1 km N Cafayate, 26º03’52’’S 65º56’19’’W; 24.XI.2006, F. Ocampo, E. Ruiz, G. San Blas, & G. Salazar, ultraviolet & mercury vapor light trap, 8 males and 2 females ( IADIZA); El Naranjo, Rosario de la Frontera, I.1944, Duret-Martínez, 1 male ( CMNC); Departamento Anta. Las Lajitas, XII.1982, A. Martínez, 1 male ( CMNC); Olleros [Chañar Muyo], II.1958, Daguerre, 2 males and 2 females ( USNM); Rivadavia, XII.1950, Daguerre, 3 females ( USNM); [without month].1905, Steinbach, 1 male ( ZMHB); Formosa: without locality and date, Mallo, 1 female ( MLPA); Pilcomayo, XII.1950, Daguerre, 2 males and 2 females ( USNM); Chaco: Gancedo, 8.XII.1939, Biraben & Bezzi, 1 female ( MLPA); Santiago del Estero: Río Salado, without date, E.R. Wagner, 2 females ( CMNC); La Palisa del Bracho, 25 km NNW d’Icaño, Laguna Mamaita, [without month].1904, E.R. Wagner, 1 male ( CASC); banks of Río Salado, D’Icaño environs, Mistol Paso, [without month].1909, E.R. Wagner, 3 females ( CASC); El Pinto, XI.1960, without collector, 1 male and 2 females ( NHMB), 1 female ( CNCI); Catamarca: without locality, C. Bruch, 1.II.1907, 1 male ( MLPA); without locality, C. Bruch, 4.II.1910, 1 female ( MLPA); without locality, date, and collector, 1 male and 1 female ( MLPA); Andalgala km 1508 [5 km W, along Ruta Nacional 9, 1000 m, in Larrea cuneifolia bushes (Zigophyllaceae) ( Schultz 1981)], 12.XI.1973, J.C. Schultz, 2 males ( CASC); La Rioja: Sañogasta (Camping), 7.XII.2013, Arriagada & Castillo, light trap, 2 males and 1 female ( CMVD); 6 km E Chepes, without date and collector, 1 female ( CMNC); Santa Fé: Carcarañá, without date and collector, 1 male ( USNM); Córdoba: without locality and date, Davis, 1 male; without locality, date, and collector, 1 female ( AMNH); Mediolanza, 24.XII.2004, E. Ruiz, 1 male ( IADIZA); San Vicente, without date, Frenzel, 2 males and 1 female ( ZMHB); Potrero de Garay, II.1948, A. Martínez, 2 males ( CMNC); Diquecito, without date, Frenzel, 1 female ( NHMB); San Luis: Quines, 24.XI.1995, S. Roig & G. Flores, 1 male ( IADIZA); El Molle, 7.II.2017, 33º02’22.8’’S 66º30’47.6’’W, 622 m, light, G. Arriagada, 1 male and 1 female ( CEMT); Sa Jerónimo, I.1979, Williner, 2 females ( CMNC); Mendoza: without locality and date, C. Bruch, 1 female ( MLPA); Buenos Aires: Felipe Solá. Puán, 17.II.1944, A. Martínez, 2 males ( CMNC); Neuquén: San Martín de los Andes, II.1956, A. Martínez, 1 male ( MZSP); Río Negro: Gral. Conesa, I.1931, without collector, 1 male ( CMNC); Coronel Gómez, XI.1945, J. Grosso, 1 male ( CMNC); Departament Gral Roca, Catriel, 4.I.2005, F.C. Ocampo, 2 females ( CMNC); San Antonio Oeste, I.1976, M. Zunino, 1 male ( CMNC); Valcheta, XII.1992, at lights, without collector, 4 males, 1 female ( CMNC).

Diagnosis. Dark purplish brown. Head and pronotum densely punctate, cribrose-like surface; elytra uniformly with bristles, vertex scaly; clypeal emargination forming a semicircle, clypeal lateral margins convex; pronotal posterior corners in obtuse angle ( Fig. 16 View FIGURE 16 A–B); in males inner margin of male metatibia carinate towards the apex, subapically slightly concave ( Fig. 16F View FIGURE 16 ); apical inner margin with tooth-like projection contiguous to the smaller spur ( Fig. 16H View FIGURE 16 ); metatibial transverse carina complete; mesotarsomere I ventrally produced, proximal margin sometimes prickled ( Fig. 16 View FIGURE 16 G–H); abdominal ventrites, propygidium, and pygidium setose, with bristles and scales throughout; pygidial apex subquadrate to rounded ( Fig. 16J View FIGURE 16 ); parameres with apex spatulate shaped in a single plane, rounded, or spiked laterally, apical length from 1/3 to 1/4 the length of the parameres after the basal split ( Fig. 16K View FIGURE 16 ).

Redescription. Length: 9.8–12.1 mm; width: 4.4–6.0 mm. Dark purplish brown. Head. Densely punctate, cribrose-like surface; vertex scaly; distance between eyes twice the width of one eye in males, three times in females; vertex scaly, sometimes with bristles on frontoclypeal surface and inner margins of eye; clypeal emargination deep, wide and rounded, forming a semicircle; outer sides of anterior teeth follow the lateral margin of clypeus, clypeal lateral margin convex; distal maxillary palpomere, maximum width more than twice the apical width; fovea deep, extending past the transverse midline of the palpomere; antenna with 10 antennomeres, club lighter in color and longer than funicle. Thorax: anterior margin of pronotum slightly produced medially; sides of pronotum with sparse, long bristles, pronotal disc coarsely punctate, punctures dense, disposed tightly; pronotal posterior corners in obtuse angle; hypomere with long bristles and scaly; mesepisternum, sides of metaventrite and metacoxae scaly abundantly, scales dense; distance between mesocoxae and metacoxae less than twice longer than the metacoxa; scutellum rounded, coarsely punctate throughout. Elytra: shiny, erect bristles disposed uniformly; elytral suture and elytron unicolored, weakly elevated; all four elytral ridges weakly defined. Legs: procoxa scaly and punctate; three protibial teeth, middle and apical equal in size, distance between basal and middle teeth equal to or slightly longer than between middle and apical; mesofemural surface setose; mesotibia subquadrate to cylindrical in cross section, mesotibial surface coarsely sculptured; apical mesotibial transverse carina strong and complete, the basal one weakly defined or absent; metafemur setose throughout; inner margin of male metatibia carinate towards the apex, slightly concave subapically ( Fig. 16F View FIGURE 16 ); apex with tooth-like projection below the smaller spur ( Fig. 16I View FIGURE 16 ); metatibial transverse carina complete in males and females; surface coarsely sculptured; metatibial apical spurs of different lengths, the larger as long as the diameter of the tibial apex; metatarsomere I shorter than metatarsomere II and wider; in males protarsomeres I to IV enlarged; protarsomere II elongate, piriform; mesotarsomeres not enlarged; mesotarsomere I in males ventrally produced, proximal margin sometimes prickled ( Fig. 16 View FIGURE 16 G–H); claw bifid, symmetrical, superior tooth of a claw longer and slightly narrower than the inferior; distance between teeth equal to the length of the inferior tooth. Abdomen: band of abundant thick scales disposed tightly beneath the outer margin of elytra; disc of ventrites setose, with bristles and scales throughout in males, sides scaly and with bristles at the midline in females, as well as the propygidium; pygidium flat or slightly convex; subquadrate; pygidial width not exceeding distance between spiracles of propygidium; pygidial disc setose, erect bristles throughout and scales mainly from the base up to the midline; pygidial apex subquadrate to rounded. Parameres: basal region equal in width to both sections of the parameres at its maximum width, parameral split at 2/3; inner margins straight or sometimes convex; apex spatulate-like in a single plane, rounded or angulate laterally, apical length from 1/3 to 1/4 times the length of the parameres after the basal split; parameres in lateral view straight, not coplanar ( Fig. 16L View FIGURE 16 ).

Type locality. Liogenys opacicollis : ARGENTINA, La Rioja ; L. densicollis : ARGENTINA, Santiago del Estero .

Geographical distribution. BOLIVIA (Santa Cruz); ARGENTINA (Salta, Formosa, Santiago del Estero , Chaco, Catamarca, La Rioja, Santa Fé, Córdoba, San Luis, Mendoza, Buenos Aires, Neuquén, Río Negro).

Remarks. Frey (1969) mentioned that L. opacicollis and L. densicollis could be the same species; but did not propose the synonymy because he could not find the type of L. opacicollis . After examining the type material of both species we determined that the male lectotype of L. densicollis ( Fig. 16B, D View FIGURE 16 ) matches with the female lectotype of L. opacicollis ( Fig. 16A, C View FIGURE 16 ), and this is identical to the female paralectotype of L. densicollis . Here, we propose the synonymy of both names.

There is a population from Catamarca ( Argentina) that has some noteable differences from the type specimens, as the clypeal teeth more rounded, pronotal punctures finer and in males the apex of parameres shorter and more angulate. We conclude that these are intraspecific variations, although we recommend further studies on our concept of this species. The specimens from Catamarca were collected on “Jarilla”, Larrea cuneifolia Cavanilles, 1800 (Zygophyllaceae) , an evergreen xerophytic shrub common in western South America ( Mercado et al. 2018).

The confirmed association of L. opacicollis with xerophytic vegetation, typical from Arid Chaco and Monte ecoregions, is shared with L. cribricollis , with the latter more associated with Schinus shrubs.

MNHN

Museum National d'Histoire Naturelle

NHMB

Natural History Museum Bucharest

USNM

Smithsonian Institution, National Museum of Natural History

CNCI

Canadian National Collection Insects

AMNH

American Museum of Natural History

MZSP

Sao Paulo, Museu de Zoologia da Universidade de Sao Paulo

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Coleoptera

Family

Melolonthidae

Genus

Liogenys

Loc

Liogenys opacicollis Fairmaire, 1892

Cherman, Mariana Alejandra, Basílio, Daniel Silva, Mise, Kleber Makoto, Frisch, Johannes & Almeida, Lúcia Massutti De 2021
2021
Loc

Liogenys densicollis

Krajcik, M. 2012: 144
Evans, A. V. & Smith, A. B. T. 2009: 176
Evans, A. V. 2003: 208
Frey, G. 1969: 38
Blackwelder, R. E. 1944: 227
Moser, J. 1921: 140
1921
Loc

Liogenys opacicollis

Krajcik, M. 2012: 145
Evans, A. V. & Smith, A. B. T. 2009: 180
Evans, A. V. 2003: 212
Frey, G. 1969: 39
Blackwelder, R. E. 1944: 227
Moser, J. 1921: 140
Dalla Torre, K. W. von 1913: 318
Fairmaire, M. L. 1892: 243
1892
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