Iuati spinithorax Martins & Galileo, 2010

Nascimento, Francisco Eriberto de Lima, Santos-Silva, Antonio & Hernández, Juan José Ramírez, 2018, Description of the female of Poeciloxestia plagiata (Waterhouse, 1880), and of the male of Iuati spinithorax Martins & Galileo, 2010 (Coleoptera, Cerambycidae), Papéis Avulsos de Zoologia 58, pp. 1-8 : 5-7

Iuati spinithorax Martins & Galileo, 2010 ( Figs. 7-13 )

Iuati spinithorax Martins & Galileo,2010:85 ; Monné, 2012: 12 (cat.); Monné et al., 2017: 8 (holotype); Monné, 2018: 96 (cat.).

Description: Male ( Figs. 7-10 ): Integument black dorsally; head and prothorax black ventrally; ventral side of meso- and metathorax, and femora dark reddish-brown, lighter toward distal abdominal segments, especially distal area of III and IV, and sides of V; mouthparts dark reddish-brown; antennae gradually dark brown toward distal segments. Elytra opaque.

Head: Frontal plate wide and moderately narrow, not well-delimited, longitudinally sulcate with median groove, sides becoming slightly tumid, and sides of area close to clypeus depressed; with moderately fine, sparse punctures laterally. Frontolateral ridges distinct, elevat- ed; finely, moderately abundantly punctate. Remaining frontal surface finely, moderately sparsely punctate; entire frontal surface glabrous. Area between anterior region of antennal tubercles distinctly, narrowly sulcate; posterior area widely carinate (carina wide up to about middle of upper eye lobes), then distinctly narrow keel-shaped to about level of posterior margin of eyes; depressed, coarsely, confluently, densely punctate on each side of carina (anterior area of carina with sparse, coarse punctures laterally); with a few long, erect golden setae close to upper eye lobes. Remaining surface of vertex convex; coarsely, moderately sparsely punctate toward eyes (punctures distinctly finer than area between upper eye lobes), slightly finer, denser toward prothorax; with minute, sparse yellowish setae laterally. Area behind upper eye lobes coarsely, confluently punctate toward eye, slightly finer and sparser toward prothorax; with short, sparse golden setae, and a few long, erect golden setae close to eye. Area behind low- er eye lobes finely, sparsely, shallowly punctate close to eye, transversely sulcate at about middle, nearly smooth toward prothorax; with minute, sparse golden setae close to eye, interspersed with a few long, erect golden setae toward ventral surface, glabrous on remaining surface. Antennal tubercles glabrous; with very fine, sparse punctures basally, smooth on remaining surface. Median groove distinct from clypeus to area between antennal tubercles. Postclypeus nearly perpendicular to frons posteriorly, narrowed centrally on this area, nearly vertical toward anteclypeus; finely sparsely punctate on wide central area close to frons, smooth on remaining surface; glabrous except a few short, erect yellowish setae on sides of area close to anteclypeus. Labrum coplanar with anteclypeus on posterior area (anterior margin of this area distinctly concave), inclined anteriorly; with both, short and long, erect golden setae laterally on posterior area, with long, erect abundant golden setae on inclined area. Genae minutely, sparsely punctate close to eye, smooth toward apex; with short, sparse golden setae toward ventral side. Gulamentum smooth, glabrous close to prothorax, slightly depressed, transversely rugose, with both short and long, erect, sparse yellowish setae between lower eye lobes. Distance between upper eye lobes 0.55 times length of scape; in frontal view, distance between lower eye lobes nearly equal to length of scape.Antennae 2.1 times elytral length, reaching elytral apex about middle of antennomere IX. Scape finely, sparsely punctate; with moderately short, sparse golden setae ventrally, glabrous on remaining surface. Antennomere III with elongate sensorial area on inner side of distal quarter; finely, sparsely punctate (punctures slightly denser than on scape); with long, erect golden setae ventrally, a few long, erect setae of same color dorsally near apex, and sparse golden pubescence laterally on distal third. Antennomere IV with sculpturing and erect setae as on III, but golden pubescence more abundant including dorsally;inner side with short sensorial area on basal third, and long sensorial area on distal half. Antennomeres V-X with ventral erect setae sparser, gradually sparser toward X (present only posteriorly after VII); dorsal erect setae as on III; with golden pubescence throughout, denser than on IV; inner side of IV with sensorial area from near base to near apex. Antennomere XI nearly divided after middle; with golden pubescence throughout. Antennal formula (ratio) based on length of antennomere III: scape = 0.64; pedicel = 0.16; IV = 0.68; V = 0.75;VI = 0.78;VII = 0.79;VIII = 0.80; IX = 0.85; X = 0.89; XI = 1.52.

Thorax: Prothorax 1.3 times wider than long; anteriorly and posteriorly abruptly constricted, anterior constriction narrower than posterior constriction; with narrow transverse sulcus surrounding area adjacent to anterior constriction. Pronotum coarsely, moderately sparsely punctate except smooth central area, areas of lateral gibbosities, and narrow anterior area, denser, confluent laterally (becoming strongly rugose); with a few long, erect yellowish-brown setae on sides of posteri- or third. Sides of prothorax unarmed; coarsely, densely rugose-punctate except smooth narrow area close to anterior margin; with a few long, erect yellowish-brown setae. Prosternum coarsely, confluently rugose-punctate on posterior half; with transverse sulcus about middle, and another transverse sulcus close to anteri- or constriction (following that on pronotum); nearly smooth close to anterior margin; with moderately narrow sulcus close to anterior margin of procoxal cavities, following toward anterior half of sides of prosternal process; with yellowish pubescence inside sulcus close to procoxal cavities, and both, short and long, very sparse yellowish-brown setae on rugose-punctate area. Prosternal process carinate centrally at basal quarter, then sulcate toward posterior third; with tab on each side of area after middle of procoxae, gradually widened from this point to apex; with sparse yellowish pubescence on basal 2/3, distinctly denser on distal third. Mesoventrite with golden pubescence not obscuring integument centrally, denser laterally except nearly glabrous apex. Mesanepisternum, mesepimeron, and metanepisternum with golden pubescence partially obscuring integument. Mesoventral process emarginate at center of posterior margin, with distinct tab on each side of posterior area. Metaventrite glabrous except golden pubescence laterally close to metacoxal cavities. Scutellum wider than high, rounded apically, nearly smooth, with minute, slightly distinct yellowish setae close to margins. Elytra: Minutely punctate, with each puncture surrounded by surface finely reticulate(reticule gradually less distinct toward apex); surface glabrous. Legs: Femora minutely, sparsely punctate on basal 3/4, slightly densely on distal quarter; with minute almost indistinct setae posteriorly; metafemora with fringe of short, golden setae about middle of dorsal surface.Tibiae gradually widened from base to apex; with abundant, erect golden setae on ventral surface of distal half, sparser on sides of posterior quarter.

Abdomen: Ventrites finely, sparsely punctate (punctures slightly coarser and denser toward V); glabrous except minute yellowish setae laterally (V with some long, erect yellowish-brown setae near center of apex); ventrite V slightly depressed on narrow area close to center of distal area, and distal margin rounded.

Dimensions (mm), one male / 3 females: Total length, 34.00/35.70-37.30; prothoracic length, 6.45/6.55-6.65; anterior prothoracic width, 6.00/5.75-6.20; posterior prothoracic width, 6.40/6.90-7.25; maximum prothoracic width, 8.25/8.90-9.15; humeral width, 9.45/10.55-10.90; elytral length, 22.70/24.45-26.00.

Material examined: PERU Loreto: Pucacuro ( Rio Corrientes ; -3.447567 / -75.429325), 1 male, 11.VIII.2012, J.J. R. Hernandez col. ( MZSP) ; 1 female, 30. V.2011, J.J. R. Hernandez col. ( JJRH) ; 1 female, 12.VIII.2012, J.J. R. Hernandez col. ( JJRH). ( New country record) , BRAZIL, Rondônia: Porto Velho ( Parque Ecológico ), holotype female, 09.XI.2008, no collector indicated ( MZSP) .

Remarks: Variation in elytral color was observed in the four specimens examined: in the male and holotype female, the elytra are entirely black, while in the two oth- er females there is a distinct elliptical red macula on the center of the dorsal surface of the anterior half, small in one female ( Fig. 14 ), larger in another ( Fig. 15 ).

Figures

Figures 7-16. (7-15) Iuati spinithorax: (7) Dorsal habitus, male; (8) Ventral habitus, male; (9) Lateral habitus, male; (10) Head, frontal view, male; (11) Head and prothorax, holotype female;(12) Head and prothorax,female 1; (13) Head and prothorax,female 2; (14) Elytron,female 1; (15) Elytron, female 2. (16) Butherium erythropus, head,frontal view,female.