Eupogonius rileyi, Santos-Silva, 2022

Santos-Silva, Antonio, 2022, New species, new records, synonymy, and notes in Eupogonius LeConte (Coleoptera, Cerambycidae, Lamiinae, Desmiphorini), Papéis Avulsos de Zoologia (Pap. Avulsos Zool., S. Paulo) 62, pp. 1-12 : 5-8

Eupogonius rileyi sp. nov.

( Fig. 3 )

Description: Holotype female: Head capsule dark brown except dark reddish-brown ventral surface; anteclypeus yellowish brown close to postclypeus, dark reddish brown close to labrum; labrum dark reddish brown close to anteclypeus, yellowish brown anteriorly; mandibles dark reddish brown basally, black apically; ventral mouthparts mostly yellowish brown with some areas more brownish or reddish brown; scape and pedicel dark reddish brown; antennomere III dark reddish brown on basal half, gradually lighter on apical half; antennomere IV dark reddish brown on basal ⅔, brown on apical third; antennomeres V-XI brown, except yellowish-brown apex of XI. Prothorax dark reddish brown, darker on margins. Ventral surface of mesothorax dark reddish brown centrally, except dark margins, dark brown laterally. Ventral surface of metathorax dark reddish brown, except blackish posterocentral area of metaventrite. Elytra mostly brown with blackish punctures. Femora dark orangish brown, except large blackish macula on sides of club. Tibiae dark reddish brown basally and apically, orangish brown on wide central area. Tarsi mostly dark brown. Ventral surface of abdomen reddish brown, except dark brown central area of ventrite 5.

Head: Frons coarsely, abundantly punctate; with dense yellowish-brown pubescence obscuring integument, and long, erect whitish setae interspersed, and a few long, erect brownish setae close to eyes. Vertex and area behind upper eye lobes coarsely, moderately sparsely punctate, except central area of vertex with finer and sparser punctures close to prothorax; with yellowish-brown pubescence, obscuring integument close to eyes, not obscuring on wide triangular area of vertex close to prothorax (pubescence gradually sparser toward prothorax); with long, erect whitish setae interspersed. Area behind lower eye lobes with dense yellowish-brown pubescence close to eye, and with long, erect whitish setae interspersed, glabrous close to prothorax. Genae with yellowish-brown pubescence obscuring integument, more pale yellow anteriorly, except almost glabrous apex; with long, erect whitish setae interspersed. Postclypeus with pubescence and erect setae as on frons. Labrum coplanar with anteclypeus at posterior ⅔, inclined at anterior third; with yellowish-brown pubescence not obscuring integument on posterior third, and long, erect yellowish setae interspersed, erect setae longer, more abundant and yellower laterally; anterior third with long, erect yellowish setae. Gulamentum smooth, glabrous, except narrow anterior area with dense yellowish-brown pubescence, and long, erect whitish setae interspersed. Area of connection between eye lobes with a single row of ommatidia; distance between upper eye lobes 0.45 times distance between outer margins of eyes; in frontal view, distance between lower eye lobes 0.67 times distance between outer margins of eyes.Antennae 1.25 times elytral length, reaching the posterior eighth of elytra. Scape abruptly widened basally, then subcylindrical toward apex; coarsely, abundantly punctate; with abundant yellowish-brown pubescence partially obscuring integument and long, both whitish and brown erect setae interspersed. Pedicel with pubescence and erect setae as on scape. Antennomere III ( Fig. 3C ) somewhat coarsely, abundantly punctate, slightly widened on posterior third; with abundant yellowish-brown pubescence not obscuring integument, long, erect brown setae interspersed throughout, more abundant ventrally, and a few long, erect yellowish setae interspersed. Antennomere IV ( Fig. 3C ) distinctly widened on apical third; with abundant pale yellow pubescence not obscuring integument on basal ⅔, and shorter brown pubescence on apical quarter; with long, erect, abundant yellowish setae throughout on basal ⅔, longer and more abundant ventrally, and long,erect brown setae ventrally on apical third. Antennomeres V-XI with abundant, short brown pubescence, except apex of XI with pale yellow pubescence; antennomeres V-X with long, erect, sparse brown setae ventrally. Antennal formula based on length of antennomere III: scape = 0.83; pedicel = 0.20; IV = 1.08; V = 0.55;VI = 0.48;VII = 0.48;VIII = 0.41; IX = 0.38; X = 0.31; XI = 0.45.

Thorax: Prothorax wider than long; sides with small, conical tubercle on middle. Pronotum coarsely, moderately sparsely punctate; with abundant yellowish-brown pubescence not obscuring integument, distinctly denser laterally, and slightly denser on longitudinal central region; with long, erect whitish setae interspersed. Sides of prothorax with sculpturing as on pronotum; with abundant yellowish-brown pubescence not obscuring integument, and long, erect whitish setae interspersed. Prosternum finely, sparsely punctate; with abundant yellowish-brown pubescence not obscuring integument, denser laterally, and long, erect whitish setae interspersed. Prosternal process with abundant pale yellow pubescence obscuring integument and long, erect whitish setae interspersed; narrowest area 0.38 times procoxal with.Ventral surface of mesothorax with abundant yellowish-brown pubescence, denser laterally. Mesoventral process abruptly elevated anteriorly, slightly longitudinally concave, slightly narrowed toward apex; apical area 0.4 times mesocoxal width; with abundant yellowish-brown pubescence on center of basal half, and yellowish-white pubescence on remaining surface. Ventral surface of metathorax with dense yellowish-brown on metanepisternum, sides, anterior and posterior areas of metaventrite (except central area of posterior area); remaining surface of metaventrite with yellowish-white pubescence not obscuring integument, and long erect, sparse setae of same color interspersed. Scutellum with dense yellowish-brown pubescence, forming fringe on margins,and a few long, erect whitish setae interspersed. Elytra: Coarsely, moderately abundantly punctate on basal half, punctures gradually finer, sparser toward apex on apical third; with abundant yellowish-brown pubescence not obscuring integument, slightly pal- er yellow and denser basally and some irregular areas; with long, erect, both yellowish and brown setae interspersed (brown setae more abundant on posterior ⅔); apex rounded. Legs: Femora subfusiform; with abundant yellowish-brown pubescence, partially obscuring integument on some areas, and long, erect, yellowish setae interspersed. Tibiae with abundant yellowish pubescence not obscuring integument, except apical ⅔ of ventral surface of protibiae with bristly yellowish-brown pubescence; with long, erect, abundant yellowish-white setae interspersed, longer dorsally,except on apical ⅔ of ventral surface of protibiae. Metatarsomere I sorter than II-III together.

Abdomen: Ventrites with abundant yellowish pubescence not obscuring integument, and fringe of dense yellow pubescence on apex of 1-4; with long, erect yellowish setae interspersed, more abundant laterally; posterior quarter of ventrite 5 inclined, with apex truncate.

Dimensions (mm): Total length, 8.60; prothoracic length, 1.60; anterior prothoracic width, 1.65; posterior prothoracic width, 1.75; maximum prothoracic width, 2.00; humeral width, 2.60; elytral length, 6.10.

Type material: Holotype female from COSTA RICA, Puntarenas: Monteverde , 26.V-03.VI.1984, E. Riley, D. Rider & D. LeDoux leg. ( FSCA).

Etymology: This species is dedicated to Edward G. Riley, one of the collectors of the holotype, for his contributions to Coleoptera .

Remarks: Eupogonius rileyi sp. nov. is similar to E. comus Bates, 1885 (see photographs on Bezark, 2021) from Mexico, but differs as follows: erect setae on the ventral surface of antennomeres V-X sparse (not sexual dimorphism);elytra unicolorous;elytra with dense pubescence on circum-scutellar region and the remaining has no distinct areas with sparse pubescence. In E. comus , the erect setae on ventral surface of antennomeres V-X are moderately abundant, the elytra are bicolorous, has a large triangular area with sparse pubescence on circum-scutellar region, and the remaining surface has irregular areas with distinct sparse pubescence. Additionally, the antennae in the holotype female of E. rileyi are much shorter than in males of E. comus , which is not the case in oth- er species of the genus, in which the antennae are only slightly longer in males. It differs from females of E.intonsus Martins & Galileo, 2012 (see photograph on Bezark, 2021) by the distinctly larger than the maximum scape diameter (about as wide as the maximum scape diameter in E. intonsus ), and antennae not reaching the elytral apex (surpassing the elytral apex in E. intonsus ); from E. major Bates, 1885 (see photographs on Bezark, 2021) by the antennomeres V-X without pale pubescence contrasting with integument color (with pale pubescence contrasting with integument color in E. major ), and antennomere IV distinctly widened toward apex ( Fig. 3C ) (cylindrical in E. major ); and differs from E. triangularis Linsley, 1935 (see photographs on Bezark, 2021) by the antennomeres V-X without pale pubescence contrasting with integument color (with pale pubescence contrasting with integument color in E. triangularis ).

Figures

Figure 3. Eupogoniusrileyi sp.nov., holotypefemale:(A) Dorsal habitus;(B)Ventral habitus;(C)Antennomeres III and IV;(D)Lateral habitus;(E)Head,frontalview.