A key to American genus Merobruchus Bridwell (Coleoptera: Chrysomelidae: Bruchinae) with descriptions of species and two new host plant records for the subfamily Author Manfio, Daiara Author Ribeiro-Costa, Cibele Stramare text Zootaxa 2016 4078 1 284 319 journal article 46790 10.11646/zootaxa.4078.1.25 e94a2297-93a5-4d20-b957-670b655f214e 1175-5326 263743 78037DEE-A4F0-4E28-8135-EFD57552C3D0 Merobruchus machadoI sp. nov. ( Figures 19 , 35, 39 , 43–44 , 66 , 90 , 115 , 140 ) Material examined . Holotype male deposited in DZUP : (1) “ Brasil –RS, Santa Maria,/ 29°41’S 53°48’W 141m ,/ V/2011 D. B. Araldi col.” (2) “Em frutos de/ Parapiptadenia rigida ”. Paratypes . 69 deposited in follow collections: 40 at DZUP , 5 males and 4 females : (1) “ Brasil –RS, Santa Maria,/29˚41’”S 53˚48’”W 141m ,/ V/2011 D. B. Araldi col.” (2) “Em frutos de/ Parapiptadenia rigida ”. 2 females and 2 males : (1) “ Brasil –RS–Santa Maria/ 12.IX.2012 J. Garlet” (2) “Larva consumindo sementes de/ Parapiptadenia rigida ”. 1 male : (1) “Porto Alegre, RS/ I. Marinheiros/ 27.X.1998 /L. Moura col.” (2) “Col. MCN/161.140”. 1 male : (1) “JUNDIAÍ DO SUL –PR/Fazenda Monte verde/ BRASIL 03.XII.1986 /Lev. Ent. PROFAUPAR/LÂMPADA”. 1 male and 2 females : (1) “ Brasil –SP–Botucatu Fazenda/Experimental Edgardia–FCA–/ UNESP 22˚48’S 48˚24’W 577m / 29.V.2009 L.M.S. Rodrigues” (2) “Larva consumindo semente de/ Parapiptadenia rigida ”. 8 males and 12 females : (1) “Santa Maria, RS/ 26/V/2012 / Garlet, J. col.” (2) “ Parapiptadenia rigida / (Benth.)/ (Angico-vermelho)”. 2 females : (1) “Xanxerê, SC/ 25/VI/2013 / Garlet, J. col.” (2) “ Parapiptadenia rigida / (Benth.)/ (Angico-vermelho)”. 9 at USNM , 1 female and 2 males : (1) “ Brasil –RS–Santa Maria/ 12.IX.2012 J. Garlet” (2) “Larva consumindo sementes de/ Parapiptadenia rigida ”. 1 female at USNM : (1) “ Brasil –SP–Botucatu Fazenda/Experimental Edgardia–FCA–/ UNESP 22˚48’S 48˚24’W 577m / 29.V.2009 L.M.S. Rodrigues” (2) “Larva consumindo semente de/ Parapiptadenia rigida ”. 2 females and 2 males : (1) “Santa Maria, RS/ 26/V/2012 / Garlet, J. col.” (2) “ Parapiptadenia rigida / (Benth.)/ (Angico-vermelho)”. 1 female : (1) “Xanxerê, SC/ 25/VI/2013 / Garlet, J. col.” (2) “ Parapiptadenia rigida / (Benth.)/ (Angico-vermelho)”. 6 at TAMU , 1 female : (1) “ Brasil –SP–Botucatu Fazenda/Experimental Edgardia–FCA–/ UNESP 22˚48’S 48˚24’W 577m / 29.V.2009 L.M.S. Rodrigues” (2) “Larva consumindo semente de/ Parapiptadenia rigida ”. 2 females and 2 males : (1) “Santa Maria, RS/ 26/V/2012 / Garlet, J. col.” (2) “ Parapiptadenia rigida / (Benth.)/ (Angico-vermelho)”. 1 female : (1) “Xanxerê, SC/ 25/VI/2013 / Garlet, J. col.” (2) “ Parapiptadenia rigida / (Benth.)/ (Angico-vermelho)”. 5 at FSCA , 2 females and 2 males : (1) “Santa Maria, RS/ 26/V/2012 / Garlet, J. col.” (2) “ Parapiptadenia rigida / (Benth.)/ (Angico-vermelho)”. 1 female : (1) “Xanxerê, SC/ 25/VI/2013 / Garlet, J. col.” (2) “ Parapiptadenia rigida / (Benth.)/ (Angico-vermelho)”. 4 at MNRJ , 2 females and 2 males : (1) “Santa Maria, RS/ 26/V/2012 / Garlet, J. col.” (2) “ Parapiptadenia rigida / (Benth.)/ (Angicovermelho)”. 5 at MZSP 2 females and 2 males : (1) “Santa Maria, RS/ 26/V/2012 / Garlet, J. col.” (2) “ Parapiptadenia rigida / (Benth.)/ (Angico-vermelho)”. 1 female : (1) “Xanxerê, SC/ 25/VI/2013 / Garlet, J. col.” (2) “ Parapiptadenia rigida / (Benth.)/ (Angico-vermelho)”. Description, holotype . Body length: 2.47 mm; width: 1.48 mm. Integument. Dorsum : entirely dark brown ( Fig. 19 ). Antenna : antennomeres 1–6 and 11 brown, 7–10 dark brown ( Fig. 35 ). Ventral region : predominantly dark brown, except anterior and middle legs pale brown and brown ( Fig. 35 ). Pygidium : mainly dark brown ( Figs 66 , 90 ). Pubescence. Dorsum : sparse pubescence, yellowish gray and brown not forming conspicuous pattern ( Fig. 19 ); pronotum with pubescence denser on lateral areas than on median region; scutellum white ( Fig. 19 ). Ventral region : mainly yellowish gray; abdominal ventrites uniformly pubescent ( Fig. 35 ). Pygidium : yellowish gray forming sparse median patch and dense longitudinal strip from base to apical third ( Fig. 90 ), interrupted in middle. Body. Ovate body, widest behind humeri. Head ( Fig. 2 ): without occipital sulcus ( Fig. 39 ); ocular index 3.42; ocular sinus 0.14 mm; postocular lobe very narrow ( Fig. 35 ); frons slightly elevated, inconspicuous frontal carina ( Figs 39 ); frontoclypeal carina present. Antenna : slightly clavate from antennomere 5 ( Fig. 35 ); 6–10 wider than long; 11 subelliptic. Pronotum : lateral margins sinuate in dorsal view ( Fig. 19 ); basal lobe with straight margin; median gibbosity absent ( Fig. 19 , 35 ); posterior region without median longitudinal sulcus ( Fig. 19 ); lateral gibbosities absent, only slightly depressed on lateral corners ( Fig. 19 ); coarse punctation all over pronotum ( Fig. 19 ); lateral carina short, reaching at most slightly over half of pronotum length. Scutellum : wider than long ( Fig. 19 ), bidentate. Elytron : humeral gibbosity slightly conspicuous ( Figs 4 , 19 ); striae regular in course, visibly impressed, free apically ( Fig. 43 ); striae 3 and 4 with basal denticle near margin of the elytron on slightly elevated gibbosity ( Fig. 44 ); stria 5 without basal denticle ( Fig. 44 ). Mesoventrite : mesoventral process rounded apically ( Fig. 47, 48 ); postmesocoxal sulcus pointed, not following the curvature of the coxa, ( Fig. 48 ). Metaventrite : not protuberant in lateral view ( Fig. 35 ); metanepisternum with coarse punctation moderately distributed; dorsal carina complete, limiting dorsal and posterior margins. Hind leg : femur in lateral view not projects beyond pygidium ( Fig. 35 ); pecten with 4 teeth; internal margin without denticles at anterior region, before pecten. Tibia, external face microserrate ( Fig. 3 ); lateroventral carina complete; mucro shorter than width of tibia apically ( Figs 3 , 35 ); coronal tooth present ( Fig. 35 ); curvature of the tibia at external margin reaching half length of tibia. Abdomen : last ventrite, median apical border with strong emargination, with very short lateral projections ( Fig. 54 ). Pygidium : convex in apical 2/ 3 in lateral view; without median lateral tubercles; apical margin truncate. Male genitalia (based on paratype ). Median lobe ( Fig. 115 ): length about 3.5 x the most width at base of ventral valve. Ventral valve subrectangular-arcuate, wider than long and as wide as the apex of median lobe, slightly emarginate at apex. Apical region with dense denticles; a pair of small thornlike sclerites with large base, thin and slightly curved apex. Median region with Y-shaped sclerite, upper stem straight, paired stems straight; a pair of large thornlike sclerites, large base with short and curved apex. Basal region with dense spines and sparse denticles. Basal hood not bilobate, 1.5 x wider than largest width at base of ventral valve. Tegmen ( Fig. 140 ): lateral lobes with moderate emargination reaching over half its length; external margins straight, internal concave; rounded at apex; without projections turned toward the ring. Paratypes , variability. Body length (n = 10): 2.02–2.71 mm; width: 1.36–1.77 mm. Integument. Dorsum : brown and dark brown or reddish brown and dark brown. Antenna : sometimes entirely brown or with antennomeres 6–10 dark brown. Ventral region : anterior and middle legs sometimes brown. Pygidium : reddish brown with two median longitudinal dark brown trips. Pubescence. Pygidium : yellowish gray and white ( Fig. 66 ), dense median longitudinal strip not interrupted in the middle. Body. Head : ocular index 2.84–3.32; ocular sinus 0.11–0.18 mm ( Fig. 2 ). Pronotum : posterior region with median longitudinal shallow sulcus. Abdomen : female, last ventrite, median apical border with arcuate emargination, with very short lateral projections ( Fig. 51 ). Pygidium : apical 2/3 more strongly convex in female; apical margin rounded in female. Male genitalia. Median lobe : Apical region, pair of thornlike sclerites with straight apex. Median region, Yshaped sclerite, paired stems slightly curved. Female. Abdomen : female, last ventrite, median apical border with arcuate emargination, with very short lateral projections ( Fig. 51 ). Pygidium : apical 2/3 more strongly convex; apical margin rounded. Diagnosis. This species differs from M . paquetae mainly by the colour dark brown of the integument on dorsum ( Figs 19, 21 ) and the apical pair of sclerites in male genitalia ( Figs 115, 117–118 ). Distribution. Brazil (São Paulo, Paraná, Santa Catarina, Rio Grande do Sul). Host plant. Fabaceae , Mimosoideae , Mimoseae : Parapiptadenia rigida (Benth.) Brenan. This host plant is for the first time recorded for Bruchinae . Etymology. The species name is in honor of the 80th Birthday of eminent researcher Prof. Dr. Angelo Barbosa Monteiro Machado, a remarkable Brazilian Odonatologist.