Bembidion (Chilioperyphus) cuyanus Roig­Juñent & Scheibler, 2004

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

Bembidion (Chilioperyphus) cuyanus Roig­Juñent & Scheibler sp. nov

( Figs. 1–13 )

Holotype. San Luis, Quebrada López, 7 km SE San Francisco, 4­XII­2000, S. Roig & C. Domínguez col. (32º 39.65´S, 66º 07.57´W) ( IADIZA).

Paratypes. 3 exx. La Rioja, 3 km E Solca, 15 XII­2000, S. Roig & C. Domínguez col. (30º 46´10” S, 66º 24´51” W, 720 m) ( IADIZA); 17 exx. La Rioja, Quebrada de Olta, 10 km 14 XII­2000, S. Roig & C. Domínguez col. (30º 38´51” S, 66º 21´16” W, 750 m) ( IADIZA; MLP, MACN); 10 exx. San Luis, Qda. del Tala, ca. Papagallos, 08­XII­2000, S. Roig & C. Domínguez col. (32º 39´00” S, 64º 57´31” W, 1059 m) ( IADIZA); 21 exx. San Luis, Trapiche, Camping, 06­XII­2000, S. Roig & C. Domínguez col. (33º 06´18” S, 66º 03´40” W) ( IADIZA; ILMA; MLPA, MACN; UASM); 9 exx. San Luis, Quebrada La Bodega, 3­XII­2000, S. Roig & C. Domínguez col. (33º 01´09” S, 66º 17´00” W, 417 m) ( IADIZA); 19 exx. San Luis, Quebrada López, 7 km SE San Francisco, 4­XII­2000, S. Roig & C. Domínguez col. (32º 39.65´S, 66º 07.57´W) ( IADIZA; ILMA; MLP, MACN; UASM); 14 exx. San Luis, Dique La Toma, 7­XII­2000, S. Roig & C. Domínguez col. (33º 02´16´S, 65º 09´51” W) ( IADIZA); 22 exx. San Luis, La Toma, Río Rosario, XII­7­ 2000, L. Herman col., gravel on shore (33º 02´16´S, 65º 39´51” W) ( AMNH); 15 exx.

San Luis, Villa La Quebrada, 3­XII­2000, S. Roig col. (33º 01´09”S, 66º 17´00” W, 412 m) ( IADIZA); 2 exx. San Luis, Virorco, 7­XII­2000, col. S. Roig (33º 06´33” S, 66º 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, 7­I­1985, S.Roig col. ( IADIZA); 1 ex. Mendoza, Reserva Divisadero Largo, 22­IX­1997, S. Roig col. ( IADIZA); 2 exx. Mendoza, La Paz, Desaguadero, 2­XII­2000, S. Roig col. (33º 16.93” S, 67º 02.03” W, 457 m) ( IADIZA); 13 exx. Mendoza, San Rafael, 4 km S Punta del Agua, 15­XII­98, Flores, G. & S. Roig col. (35º 32.96´S 68º 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, 7­I­2003, col. S. Roig (36º 16´51.8” S, 68º 31´04” W) ( IADIZA); 1 ex. Catamarca, 5 km N Belén, 17­X­1997, S. Roig col. (27º 37.19´S, 67º 01.01´W) ( IADIZA); 1 ex. Córdoba, 15 km N de Capilla del Monte, 11­XII­ 2000, C. Domínguez & S. Roig col (30º 41.59´S, 64º 39.71´W, 658 m) ( IADIZA); 17 exx. Córdoba, Ruta 41 y Río de Cañada Honda, 07­XII­2000, S. Roig & C. Domínguez col. (33º 07´10” S, 65º 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. 1 ). Head large, pronotum narrow, and elytra proportionately long.

Color ( Fig. 1 ): 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. 1 ). 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. 1 ), 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, 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. 3 ).

Prothorax. Pronotum maximum width at middle ( Fig. 1 ); 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. 4 ), with one clamp seta; protarsomeres 1 and 2 of male expanded ( Fig. 5 ), 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. 4 ) and tarsomeres with numerous setae, even the 5th tarsomeres with extra setae (12 or more) ( Fig. 5 ).

Male genitalia ( Figs. 6–11 ). 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. 8 ), not extended beyond basal bulb ( Figs. 6 and 7 ). Flagellum constituted by long fibers, grouped closely together in central sector ( Fig. 6 and 7 ); apically, several fibers extended beyond others ( Fig. 8 ), basally, two or three fibers observed ( Figs. 6 and 7 ). Left paramere ( Fig. 9 ) styliform, with base expanded, apical setae three generally, four in some specimens; central seta thicker and longer than others ( Fig. 9 ). Right paramere styliform, apical setae three ( Fig. 10 ). Sclerite IX complete and slender ( Fig. 11 ).

Female genitalia ( Figs. 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 (27º latitude South) to southern Mendoza (36º latitude South), occurring in a long strip of about 1000 km. From East to West the species range extends from Mendoza (68º longitude West) to Córdoba provinces (64º longitude West) ( Fig. 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).

Figures

FIGURE 13. Geographical distribution of Bembidion (Chilioperyphus) cuyanus nov. sp.

FIGURES 1 – 3. Habitus of Bembidion (Chilioperyphus) cuyanus nov. sp. male. Scale bar = 1 mm; Fig. 2 Maxilla, ventral view; Fig. 3 labium, ventral view. Scale bar = 0.35 mm.

FIGURES 4 – 10. Bembidion (Chilioperyphus) cuyanus nov. sp., Fig. 4, front tibia, ventral view,; Fig. 5 front male tarsomeres, ventral view; Figs. 6 ­ 10. Aedeagus of Bembidion (Chilioperyphus) cuyanus nov. sp., Fig. 6 median lobe lateral left view; Fig. 7 median lobe lateral right view; Fig. 8, apex median lobe showing the apex of flagellum; Fig. 9 left paramere; Fig. 10, right paramere. Figs. 4, 5 and 8 scale bar = 0.35 mm; Figs. 6, 7, 9 and 10 scale bar = 0.50 mm.

FIGURES 11 – 12. Fig. 11, sclerite IX of Bembidion (Chilioperyphus) cuyanus nov. sp. Fig. 12, female genital tract of Bembidion (Chilioperyphus) cuyanus nov. sp. Scale bar = 0.5 mm.