Bembidion (Chilioperyphus) cuyanus Roig­Juñent & Scheibler

Roig-Juñent, Sergio & Scheibler, Erica, 2004, A new Argentinian species of Bembidion (Chilioperyphus) (Coleoptera: Carabidae: Bembidiini) with accessory setae, Zootaxa 782, pp. 1-10: 3-9

publication ID 10.5281/zenodo.158016

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Bembidion (Chilioperyphus) cuyanus Roig­Juñent & Scheibler

sp. nov

Bembidion (Chilioperyphus) cuyanus Roig­Juñent & Scheibler  sp. nov

( Figs. 1–13View FIGURES 1 – 3View FIGURES 4 – 10View FIGURES 11 – 12View FIGURE 13)

Holotype. San Luis, Quebrada López, 7 km SE San Francisco, 4 ­XII­ 2000, S. Roig & C. Domínguez col. (32 º 39.65 ´ S, 66 º 07.57´ W) ( IADIZA).

Paratypes. 3 exx. La Rioja, 3 km E Solca, 15 XII­ 2000, S. Roig & C. Domínguez col. (30 º 46 ´ 10 ” S, 66 º 24 ´ 51 ” W, 720 m) ( IADIZA); 17 exx. La Rioja, Quebrada de Olta, 10 km 14 XII­ 2000, S. Roig & C. Domínguez col. (30 º 38 ´ 51 ” S, 66 º 21 ´ 16 ” W, 750 m) ( IADIZA; MLP, MACN); 10 exx. San Luis, Qda. del Tala, ca. Papagallos, 08­XII­ 2000, S. Roig & C. Domínguez col. (32 º 39 ´ 00” S, 64 º 57 ´ 31 ” W, 1059 m) ( IADIZA); 21 exx. San Luis, Trapiche, Camping, 06­XII­ 2000, S. Roig & C. Domínguez col. (33 º 06´ 18 ” S, 66 º 03´ 40 ” W) ( IADIZA; ILMA; MLPA, MACN; UASM); 9 exx. San Luis, Quebrada La Bodega, 3 ­XII­ 2000, S. Roig & C. Domínguez col. (33 º 01´ 09” S, 66 º 17 ´ 00” W, 417 m) ( IADIZA); 19 exx. San Luis, Quebrada López, 7 km SE San Francisco, 4 ­XII­ 2000, S. Roig & C. Domínguez col. (32 º 39.65 ´ S, 66 º 07.57´ W) ( IADIZA; ILMA; MLP, MACN; UASM); 14 exx. San Luis, Dique La Toma, 7 ­XII­ 2000, S. Roig & C. Domínguez col. (33 º 02´ 16 ´ S, 65 º 09´ 51 ” W) ( IADIZA); 22 exx. San Luis, La Toma, Río Rosario, XII­ 7­ 2000, L. Herman col., gravel on shore (33 º 02´ 16 ´ S, 65 º 39 ´ 51 ” W) ( AMNH); 15 exx.

San Luis, Villa La Quebrada, 3 ­XII­ 2000, S. Roig col. (33 º 01´ 09”S, 66 º 17 ´ 00” W, 412 m) ( IADIZA); 2 exx. San Luis, Virorco, 7 ­XII­ 2000, col. S. Roig (33 º 06´ 33 ” S, 66 º 06´ 32 ” W, 1138 m) ( IADIZA); 3 exx. same locality and date, L. Herman col., under rocks and shingle ( AMNH); 1 ex. Mendoza, El Challao, Cerro la Bodeguita, 7 ­I­ 1985, S.Roig col. ( IADIZA); 1 ex. Mendoza, Reserva Divisadero Largo, 22 ­IX­ 1997, S. Roig col. ( IADIZA); 2 exx. Mendoza, La Paz, Desaguadero, 2 ­XII­ 2000, S. Roig col. (33 º 16.93 ” S, 67 º 02.03” W, 457 m) ( IADIZA); 13 exx. Mendoza, San Rafael, 4 km S Punta del Agua, 15 ­XII­ 98, Flores, G. & S. Roig col. (35 º 32.96 ´ S 68 º 03.81´ W) ( IADIZA; ILMA, MLPA, MACN, UASM); 1 ex. Mendoza, Salinas del Nihuil, S. Roig col. ( IADIZA); 1 ex. Mendoza, Malargüe, Salinillas, Reserva Total el Payén, 7 ­I­ 2003, col. S. Roig (36 º 16 ´ 51.8 ” S, 68 º 31 ´ 04” W) ( IADIZA); 1 ex. Catamarca, 5 km N Belén, 17 ­X­ 1997, S. Roig col. (27 º 37.19 ´ S, 67 º 01.01´W) ( IADIZA); 1 ex. Córdoba, 15 km N de Capilla del Monte, 11 ­XII­ 2000, C. Domínguez & S. Roig col (30 º 41.59 ´ S, 64 º 39.71 ´ W, 658 m) ( IADIZA); 17 exx. Córdoba, Ruta 41 y Río de Cañada Honda, 07­XII­ 2000, S. Roig & C. Domínguez col. (33 º 07´ 10 ” S, 65 º 54 ´ 43 ” W) ( IADIZA).

Specific epithet. The specific epithet, is a Latinized adjective based on "Cuyo", the name of the region of Argentina, where the species is widely distributed.

Diagnosis. Head with front and vertex impunctate, frontal furrows parallel, extended anteriorly toward clypeus; with supraorbital setae three to five each side; terminal maxillary palpomere three times shorter than the length of penultimate palpomere; pronotum narrow and constricted basally; lateral margin sinuate basally, with five to seven lateral setae; posteriolateral angles rounded; elytra maculate, humerus rounded; eight striae, punctuate, intervals 3, 5 and 7 each with a row of setae from base to apex; stria 8 with 28 to 37 setae in umbilicate series; hind wings fully developed.

Description. Length: 3.7–4.3 mm.

Habitus ( Fig. 1View FIGURES 1 – 3). Head large, pronotum narrow, and elytra proportionately long.

Color ( Fig. 1View FIGURES 1 – 3): Head and pronotum dark green, in some specimens almost black. Mandibles and maxillary and labial palpomeres yellow brown. Antennomeres yellow brown, darker in the apical region. Legs of same color as antenna, with basal and apical regions of femur, tibia and tarsomeres darker. Elytra yellow, each elytron with three maculae: a small basal, a medial transversal, and an apical macula ( Fig. 1View FIGURES 1 – 3). Punctures of elytral striae dark brown.

Head. Eye rounded, of moderate size. Head smooth, without punctures, and dorsally convex, slightly constricted posteriad eyes; frontal furrows deep and broad ( Fig. 1View FIGURES 1 – 3), parallel, each extended anteriorly to seta of clypeus; with three to five supraorbital setiferous punctures, generally with four.

Antennae long and slender, antennomeres sub­rectangular, scape with one to 5 or 6 setae, antennomere 2 to 10 with subapical ring of setae, apical half of antennomeres 3 and 4 with some very short setae in addition to those of apical ring; 5 to 11 covered with dense, short setae.

Mouthparts Mandibles porect, long. Maxillary and labial palpi long, except terminal palpomeres short, labial palpomere and maxillary palpomere less than 3 times the length of penultimate palpomere ( Figs. 2, 3View FIGURES 1 – 3), penultimate labial palpomere with four­five setae; mentum with a rounded tooth, with two rounded foveae, with two paramedian setae; submentum with four setae; glossal sclerite with two setae; paraglossae long, asetose ( Fig. 3View FIGURES 1 – 3).

Prothorax. Pronotum maximum width at middle ( Fig. 1View FIGURES 1 – 3); disc convex, constricted in the basal region; basal margin slightly convex; apical angles obsolete, rounded; anterior transverse impression only slightly defined laterally, median longitudinal impression slightly impressed, except in the apical region in form of a longitudinal fovea, disc with slight transverse impressions in the center; posteriolateral foveae each in the form of a long impression, four to six anterior and midlateral setiferous punctures, generally four, one more at base. Prosternal intercoxal process smooth, glabrous, and marginate only laterally.

Elytra. Moderately convex, scutellar stria with four to eight punctures, generally five; striae with punctures distinctly impressed throughout length, decreased in size toward apex. Punctures of moderate size, about 12 punctures in one millimeter. Only stria 1 distinctly impressed in apical third, remaining striae shallow in apical region, basal and medial region represented only by punctures. Recurrent stria confluent with seventh stria. Plica present. Intervals flat; umbilicate series of on stria 8 of 28 to 37 setae. Intervals 3, 5 and 7 each with complete row of setae: interval 3 with 12 to 17, interval 5 with 15 to 21, and interval 7 with 18 to 27.

Legs. Antenna cleaner of front tibia ( Fig. 4View FIGURES 4 – 10), with one clamp seta; protarsomeres 1 and 2 of male expanded ( Fig. 5View FIGURES 4 – 10), 1 with two rows of articulosetae; 2, with only the internal row of articulosetae. All male protarsomeres dorsally sulcate. Meso and metatarsomeres long and slender. Female tarsomeres long and slender. Femur, tibia ( Fig. 4View FIGURES 4 – 10) and tarsomeres with numerous setae, even the 5 th tarsomeres with extra setae (12 or more) ( Fig. 5View FIGURES 4 – 10).

Male genitalia ( Figs. 6–11View FIGURES 4 – 10View FIGURES 11 – 12). Median lobe moderately narrow, with apex rounded, and

basal bulb with right wall almost lacking; ventral margin concave in lateral view; internal sac without brush sclerite, flagellum long, sinuate on apex ( Fig. 8View FIGURES 4 – 10), not extended beyond basal bulb ( Figs. 6 and 7View FIGURES 4 – 10). Flagellum constituted by long fibers, grouped closely together in central sector ( Fig. 6 and 7View FIGURES 4 – 10); apically, several fibers extended beyond others ( Fig. 8View FIGURES 4 – 10), basally, two or three fibers observed ( Figs. 6 and 7View FIGURES 4 – 10). Left paramere ( Fig. 9View FIGURES 4 – 10) styliform, with base expanded, apical setae three generally, four in some specimens; central seta thicker and longer than others ( Fig. 9View FIGURES 4 – 10). Right paramere styliform, apical setae three ( Fig. 10View FIGURES 4 – 10). Sclerite IX complete and slender ( Fig. 11View FIGURES 11 – 12).

Female genitalia ( Figs. 12View FIGURES 11 – 12). Spermatheca rounded, sclerotized. Bursa copulatrix without sclerites. Ovipositor: gonocoxite 2 with two ensiform setae on dorsal and ventral margins; subapical setose organ present, with nematiform setae.

Geographical distribution. The specimens were collected in the Western region of Argentina, in sites from Catamarca province (27 º latitude South) to southern Mendoza (36 º latitude South), occurring in a long strip of about 1000 km. From East to West the species range extends from Mendoza (68 º longitude West) to Córdoba provinces (64 º longitude West) ( Fig. 13View FIGURE 13).

Habitat. Bembidion cuyanus  lives along the border of creeks, rivers, and shore of lakes in the arid Monte and Chaco biomes.

Phylogenetic relationships with other Bembidiina  . Bembidion cuyanus  sp. nov. is included with the South American group of subgenera (phylogenetic series sensu Jeannel 1962) that have discal setiferous punctures are on stria 3 and basal bulb of median lobe is without most of a right wall. This group is composed of six subgenera, all of them endemic in Southern South America ( Toledano, 2002). Within this group of subgenera this new species is clearly separated from the subgenus Nothonepha Jeannel  because it has elytral striae represented by grooves and punctures, from the subgenus Plocamoperyphus Jeannel because the clypeus is not fused with the frons, and from subgenus Notoperyphus Bonniard  de Saludo because the dorsal surface is shiny. Based on the external morphology Bembidion cuyanus  belongs to one of the other three subgenera, Antiperyphus Jeannel  , Antiperyphanes Jeannel  or Chilioperyphus Jeannel. Also  , an important feature of the internal sac of these three subgenera is the absence, in most species, of the central sclerotized brush typical of the genus Bembidion ( Toledano, 2002)  . These subgenera are separated from one another principally on the basis of details of the flagellum of the internal sac. The species of the subgenus Antiperyphus Jeannel  have in addition to a long flagellum, several small sclerotized structures; and in Antiperyphanes Jeannel  , the flagellum is extended beyond the basal orifice of median lobe, in some species reaching the dorsal part of median lobe; in Chilioperyphus  , the flagellum is not extended beyond the basal bulb, and other sclerites are lacking from the internal sac. Based on details of its internal sac, we consider Bembidion cuyanus  , as a member of the subgenus Chilioperyphus Jeannel. Moreover  , Bembidion (Chilioperyphus) cuyanus  adults are easily distinguished from most other South American species by the extra setae, and from the setose Bembidion (Antiperyphus) hirtipes (Jeannel)  because its numerous extra setae are only found on the legs.

The subgenus Bembidon ( Chilioperyphus  ) has three known species, Bembidion (C.) mendocinus (Jensen­Haarup)  , Bembidion (C.) orregoi (Germain)  , and Bembidion (C.) cassinensis Roig­Juñent & Gianuca.  Bembidion (C.) orregoi  was redescribed and illustrated by Jeannel (1962).


Museo de La Plata


Museo Argentino de Ciencias Naturales Bernardino Rivadavia


Istituto Leonardo Murialdo


University of Alberta, E.H. Strickland Entomological Museum


American Museum of Natural History