A revision of the genus Ora Clark, 1865 (Coleoptera: Scirtidae) in Argentina (part II) — redescriptions, updated distributions and a key to species Author Libonatti, María Laura text Zootaxa 2015 3985 1 69 97 journal article 10.11646/zootaxa.3985.1.4 14b11dbc-56b9-4d31-a6e9-5e638eb48446 1175-5326 289063 F3C033F4-9745-49B7-BFB5-0C5A1FA99C3D Ora bivittata Pic, 1922 ( Figs. 5 , 44–51 ) Ora bivittata Pic, 1922 : 5 Type material. Holotype : not sexed ( MNHN ), “Corumba / Matt Grosso” [white label, printed], “ Ora / bivittata / n sp” [white label, handwritten by Pic], “ HOLOTYPUS / Ora bivittata / Pic, 1922 ” [red label, printed]. Additional material studied. ARGENTINA : 1 ♂ (BR),“R EP ARGENTINA / Gob. Chaco / XII. 1894 / C. Bruch” [white label, printed], “ Ora / bivittata / Pic” [white label, handwritten by Bruch], “ Ora / bivittata Pic ” [white label, handwritten by Pic]. Diagnosis. Size very small, body oval, each elytron testaceous with a long brown vitta ( Fig. 5 ); tegmen slightly asymmetrical, with an apical digitiform outgrowth ( Fig. 50 ); penis slightly asymmetrical, rod-shaped, straight, flattened ( Fig. 51 ). Redescription (based on the specimen from Chaco ex BR). Measurements. Male (n = 1): TL 2.82 mm , PL 0.58 mm , PW 1.35 mm , EL 2.30 mm , EW 2.05 mm . Habitus. Broadly oval, depressed, maximum width at basal third of elytra, closely covered with yellowish setae ( Fig. 5 ). Coloration. Head, antennomeres 1–3, pronotum, scutellar shield, legs and ventral surface reddish testaceous, basal half of hind femora brownish, elytra pale testaceous, each with a broad brown vitta on the disc extending from a little below the base to near the apex, antennomeres 3–11 brown. FIGURES 44–51. Ora bivittata Pic , male from Chaco. 44, abdomen, ventral aspect; 45, ventrite 5; 46, tergite 7; 47, tergite 8; 48, tergite 9; 49, sternite 9; 50, tegmen, dorsal aspect; 51, penis, dorsal aspect. Head. Rather wide, 2.0x wider than interocular space, clypeal surface flat; punctation very fine, dense, punctures separated by 1.0x diameter. Antennae filiform, with apical margins of antennomeres 4–10 slightly projected anteriorly, approximate ratio of antennomeres: 2.3: 1.2: 1.0: 2.0: 2.0: 2.0: 1.7: 1.7, approximate L/W ratios of antennomeres: 1.8, 1.2, 1.0, 1.5, 1.5, 1.5, 1.3, 1.3 (antennomeres 9–11 missing). Thorax. Pronotum approximately 2.3x wider than long, anterolateral angles sharply projecting anteriorly, lateral margins rounded; punctation on pronotum and scutellar shield similar to that on head. Elytra depressed anterolaterally, humerus well marked, lateral margins rounded; punctation composed of very fine puctures separated by 1.0–2.0x diameter, with intermixed coarser punctures twice the size and separated by 3.0x diameter; elytra with a row of submarginal punctures parallel to the elytral suture. Mesoventral process elongate, very thin, with acute apex. Approximate length ratio of metatarsomere 1: dorsal metatibial spur: ventral metatibial spur: 3.6: 2.4: 1.0. Abdomen. Completely covered with short yellowish setae except for a pair of glabrous oval regions on each side of the ventrites 2–5 ( Fig. 44 ). Ventrites 2–5 exhibiting long curved dark setae on lateral regions ( Fig. 45 ). Apex of ventrite 5 deeply concave ( Fig. 45 ). Male terminalia and genitalia. Tergite 7 with posterior margin subtrapezoidal, covered with long setae over the central-posterior part, with very short apodemes ( Fig. 46 ). Tergite 8 with sclerotized apodemes converging posteriorly, with a sclerotized U-shaped cross-piece, plate rectangular with tufts of long microtrichia on posterior margin and tufts of short microtrichia on lateral parts ( Fig. 47 ). Sternite 8 not distinct. Tergite 9 with a pair of sclerotized straight apodemes converging posteriorly, plate more or less square-shaped, with tufts of long microtrichia on posterolateral parts ( Fig. 48 ). Sternite 9 more or less triangular, very finely apically bilobed, with a pair of sclerotized regions, with setae on apical part ( Fig. 49 ). Tegmen with an apical digitiform outgrowth; microsculpture consisting of pores on the digitiform outgrowth, interconected lines on apical part, and pores, long and short setae throughout the medial part ( Fig. 50 ). Penis slightly asymmetrical, rod-shaped, straight, basal part flattened (the apex partly missing in the specimen examined) ( Fig. 51 ). Female genitalia. Female unknown. Distribution. Brazil . Argentina : Chaco Province. Remarks. Ora bivittata bears a brown stripe or vitta on each elytron as do O. obliqua Champion, 1897 (from Mexico and Guatemala ) and O. discoidea Champion, 1897 (from Mexico , Guatemala and Honduras ), and is similar to O. depressa in the rod-shaped penis, but its body size is much smaller than those of the three species mentioned above and the penis is straight rather than curved as in O. depressa .