Eupogonius rifkindi, Bezark & Santos-Silva, 2023

Bezark, Larry G. & Santos-Silva, Antonio, 2023, American biodiversity in Lamiinae (Coleoptera, Cerambycidae): description of three new species of Eupogonius LeConte and new distribution records, Zootaxa 5296 (3), pp. 406-420 : 407-411

Eupogonius rifkindi sp. nov.

( Figs 1–8, 10 )

Description. Holotype female ( Figs 1–4 , 7, 10 ). Integument mostly dark brown; ventral mouthparts reddish brown with irregular dark-brown areas interspersed, except blackish palpomeres with dark reddish brown apex; anteclypeus yellowish brown laterally close to postclypeus; labrum yellowish brown on anterior quarter; antennomere IV dark reddish brown from base to slightly after middle; apical quarter of antennomere XI reddish brown. Tibiae dark reddish brown from near base to slightly after middle (not distinct depending on light intensity).

Head. Frons abundantly, coarsely punctate; with erect, both short and long whitish setae in nearly all punctures, except a few punctures close to eyes with long, erect dark-brown setae. Area between antennal tubercles with sculpturing as on frons; punctures on central region with short, erect yellowish-white seta; lateral punctures with long, erect brownish setae; area between upper eye lobes abundantly, coarsely punctate, with sparse pale-yellow pubescence, denser close to eyes, and both short and long, erect yellowish-white setae in central punctures, and long, erect, both brownish and dark brown setae in lateral punctures; remaining surface of vertex abundantly, coarsely punctate, with sparse whitish pubescence posteriorly, almost absent toward eyes, with short, erect yellowish-white setae in central punctures, and long, erect brownish setae in lateral punctures.Area behind upper eye lobes abundantly, coarsely punctate; with dense pale-yellow pubescence close to eye, pubescence slightly sparser inferiorly close to prothorax and absent superiorly close to vertex; some punctures with long, erect setae, setae longer and brownish close to eyes, shorter and yellowish-white toward prothorax. Area behind lower eye lobes abundantly, coarsely punctate; with somewhat abundant pale-yellow pubescence close to eye, pubescence absent close to prothorax; some punctures with long, erect whitish setae. Genae 0.8 times as long as lower eye lobe; somewhat sparsely, coarsely punctate, punctures absent close to clypeus and frons and apex; with long, erect whitish setae in nearly all punctures. Antennal tubercles somewhat sparsely, coarsely punctate; with sparse, decumbent whitish pubescence basally, and erect, both short and long yellowish-brown setae, part of setae in punctures. Wide central area of postclypeus sparsely, coarsely punctate, punctures shallower centrally; with a few short, erect whitish setae centrally, erect, long, both whitish and yellowish setae in punctures close to frons, and decumbent, whitish setae in some punctures close to anteclypeus. Sides of postclypeus smooth, glabrous. Labrum minutely, transversely striate close to anteclypeus, coarsely, confluently punctate centrally, smooth anteriorly; with a few short whitish setae centrally on punctate region, and somewhat abundant, long yellowish-white setae directed forward on side of central region; anterior region glabrous, except short fringe of yellowish-brown setae on anterior margin. Gulamentum smooth, glabrous; intermaxillary process with yellowish pubescence not obscuring integument, and long, erect white setae interspersed. Eyes ( Fig. 7 ) slightly coarsely faceted; widest area of upper eye lobes with seven rows of ommatidia ( Fig. 10 ); distance between upper eye lobes 0.33 times distance between outer margins of eyes; in frontal view, distance between lower eye lobes 0.71 times distance between outer margins of eyes. Antennae 1.45 times elytral length, reaching elytral apex at base of antennomere XI. Scape cylindrical, slightly, gradually widened on basal third and slightly narrowed apically; coarsely rugose-punctate, especially dorsally and laterally; with a few short, decumbent white setae, and somewhat abundant, long, erect, both brownish and yellowish-brown setae dorsally and on superior region of sides, and long, erect white setae ventrally and on inferior region of sides. Pedicel with sparse white pubescence, long, erect dark brown setae interspersed, and a few moderately long, erect white setae interspersed dorsally. Antennomere III with a few short, decumbent, both white and yellowish-brown, somewhat abundant, long, erect, both dark-brown and yellowish-brown setae, more abundant ventrally, and a few long, erect white setae interspersed. Reddish-brown region of antennomere IV with sparse white pubescence, and long, erect white setae interspersed, erect setae longer and more abundant ventrally; dark region with moderately long, decumbent yellowish-brown setae and long, erect dark brown setae interspersed, erect setae longer and more abundant ventrally. Antennomeres V–X with abundant yellowish pubescence not obscuring integument, pubescence gradually whiter toward X, long, erect dark brown setae interspersed ventrally, short, erect yellowish-brown setae interspersed dorsally, and a few moderately short, erect, both dark-brown and dark yellowish-brown setae apically; antennomere III 1.25 times longer than prothorax. Antennomere XI with abundant whitish pubescence dorsally and laterally on basal 3/4, denser and white on dorsal and lateral quarter, dark brown on basal 3/4 of ventral surface, and sparser and white on apical quarter; with short, erect, both white and yellowish setae interspersed on posterior half. Antennal formula based on length of antennomere III: scape = 0.60; pedicel = 0.10; IV = 0.79; V = 0.35; VI = 0.32; VII = 0.26; VIII = 0.23; IX = 0.21; X = 0.19; XI = 0.30.

Thorax. Prothorax slightly wider than long; without acute lateral tubercle, with rounded projection centrally; sides slightly divergent from anterolateral angles to central projection, slightly convergent from central projection to posterolateral angles. Pronotum densely, coarsely punctate; with three longitudinal pale-yellow pubescent bands, from anterior to posterior margin, one on each side, projected toward sides of prothorax between anterior third and rounded central projection, another centrally, sparser, narrowed, bifurcate at middle area of pronotum, all longitudinal pubescent bands fused close to anterior and posterior margins by narrow transverse pale-yellow pubescent band; with two transverse, sparse yellowish-white pubescent bands between longitudinal pubescent bands, one on anterior third, another on posterior third; remaining surface glabrous; punctures with erect, short and yellowish-white seta or long brown seta, some long seta brown basally and gradually yellowish toward its apex; center of posterior margin with long white setae directed backward. Sides of prothorax abundantly, coarsely punctate; with abundant pale-yellow pubescence not obscuring integument and long, erect brown setae interspersed. Prosternum somewhat abundantly, coarsely punctate, except somewhat finely, sparsely punctate area close to anterior margin; sides with abundant pale-yellow pubescence and remaining surface with sparse yellowish-white pubescence; with long, erect yellowish-white setae interspersed. Prosternal process somewhat abundantly, coarsely punctate; with both, yellowish-brown and whitish pubescence not obscuring integument, and long, erect white setae interspersed; narrowest area 0.3 times procoxal width. Mesoventrite subglabrous centrally, with abundant pale yellowish-brown pubescence laterally, gradually denser toward apex; mesanepisternum, mesepimeron, and metanepisternum with dense yellowish-brown pubescence. Mesoventral process with sides convergent toward truncate apex; apical width 0.45 times mesocoxal width; with sparse pale-yellow pubescence and long, erect setae of same color interspersed. Metaventrite abundantly, coarsely punctate laterally and anterocentrally, punctures finer and sparser on remaining surface, except smooth area close to metathoracic discrimen; with dense pale-yellow pubescence laterally, sparser anterocentrally and posterior area on each side of metathoracic discrimen, very sparse on remaining surface; with long, erect white setae interspersed laterally. Scutellum with abundant pale-yellow pubescence not obscuring integument, except denser yellowish-brown pubescence apically. Elytra. Abundantly, coarsely punctate on anterior third, punctures gradually finer and sparser toward apex on remaining surface; with dense, large, irregular yellowish-white pubescent maculae throughout (pubescence more grayish-white depending on light intensity); remaining surface glabrous or with sparse yellowish-white pubescence; with long, erect setae in nearly all punctures, setae mostly dark brown or yellowish brown dorsally, and white on lateral and apical margins; apex rounded. Legs. Femora with abundant yellowish pubescence not obscuring integument, pubescence denser and bristly ventrally. Protibiae with sparse white pubescence, except dense, bristly yellowish-brown on posterior 3/4 of ventral surface; dorsal and lateral surfaces with somewhat abundant, long, erect white setae, and a few dark brown or yellowish setae interspersed. Mesotibiae with sparse white pubescence, almost absent on basal quarter, except posterior 2/3 of dorsal surface with abundant, erect, both short and long yellowish-white and pale-yellow setae, and posterior half of ventral surface with abundant, bristly yellowish pubescence, ventral pubescence gradually yellower toward apex; long and erect setae as on protibiae. Metatibiae with sparse white pubescence, except apical third of ventral surface with dense, bristly yellowish-brown pubescence; erect setae as on protibiae. Dorsal surface of tarsi with sparse yellowish-white pubescence and long dark-brown setae laterally.

Abdomen. Ventrites with abundant yellowish-white pubescence not obscuring integument, denser and yellower on apex of ventrite 1, and long, erect white setae interspersed laterally; apical third of ventrite 5 with long, erect brown setae interspersed.

Male ( Figs 3–6 , 8 ). Similar to female, differing by the antennae longer, 1.7 times elytral length, reaching elytral apex at apex of antennomere VIII.

Variation. Antennomere III dark reddish brown on basal half; antennomeres V–XI dark reddish brown; sides of area between antennal tubercles, area between upper eye lobes, and part of area after them with abundant pale-yellow pubescence not obscuring integument; longitudinal pubescent band on center of pronotum dense; scutellum with dense pale-yellow pubescence throughout; elytral pubescence forming irregular longitudinal band on dorsal surface of anterior half.

Dimensions (mm) (Holotype female/ paratype male/ paratype female. Total length, 6.25/6.05/6.05; prothoracic length, 1.25/1.25/1.20; anterior prothoracic width, 1.25/1.10/1.10; posterior prothoracic width, 1.25/1.20/1.20; maximum prothoracic width, 1.40/1.35/1.35; humeral width, 1.85/1.75/1.75; elytral length, 4.35/4.25/4.10.

Type material. Holotype female from MEXICO, Colima: Lago La Maria vic., 12.VII.2017, J. Rifkind & E. Martinez leg. ( CASC, formerly LGBC) . Paratypes — MEXICO, Colima: 1 male, same data as holotype ( LGBC) ; 1 female, same data as holotype ( MZSP, formerly LGBC) .

Etymology. This species is named for Jacques Rifkind, colleague of the first author, who collected the holotype.

Remarks. Eupogonius rifkindi sp. nov. is similar to E. martinezi sp. nov. (figs 16–19), but differs as follows: ommatidia smaller ( Figs 7, 8, 10 ); upper eye lobes with seven rows of ommatidia on the widest region ( Fig. 10 ); and distance between upper eye lobes in female 1.55 times maximum diameter of the scape. In E. martinezi sp. nov., the ommatidia are larger (fig 9, 11), upper eye lobes with five rows of ommatidia on the widest region ( Fig. 11 ), and the distance between upper eye lobes in female 1.35 times maximum diameter of the scape. The new species differs from E. pulcher sp. nov. ( Figs 12 , 20–23 ), especially by the upper eye lobes ( Figs 7–8 ) slender and the distance between them distinct larger than the maximum width of the scape (upper eye lobes wider and closer to each other than the maximum diameter of the scape in E. pulcher sp. nov.); from E. affinis Breuning, 1942 ( Fig. 13 ) by the antennomere III distinctly longer than the prothoracic length in both sexes (shorter than the prothoracic length in E. affinis ); from E. arizonensis Knull, 1954 ( Fig. 14 ) by the sides of the prothorax without spiniform tubercle (with spiniform tubercle in E. arizonensis ); and from E. guerrerensis Wappes & Santos-Silva, 2020 ( Fig. 15 ) by the scape slender and longer (wider and shorter in E. guerrerensis ), and frons without dense pubescence (pubescence dense, partially obscuring integument in E. guerrerensis ).

Figures

FIGURES 1–6. Eupogonius rifkindi sp. nov. Holotype female: 1) Dorsal habitus; 2) Ventral habitus; 3) Lateral habitus; 4) Head, frontal view. Paratype male: 5) Dorsal habitus; 6) Ventral habitus.

FIGURES 7–15. Eupogonius spp. 7–8) E. rifkindi sp. nov., head, dorsal view: 7) Holotype female; 8) Paratype male. 9) E. martinezi sp. nov., holotype female, head, dorsal view. 10) E. rifkindi sp. nov., holotype female, upper eye lobe. 11) E. martinezi sp. nov., holotype female, upper eye lobe. 12) E. pulcher sp. nov., holotype male, head, dorsal view. 13) E. affinis Breuning, 1942, holotype, head, pronotum, and antennomere III. 14) E. arizonensis Knull, 1954, male from Guatemala (Alta Vera Paz, near Agua Blanca), head, pronotum, and basal antennomeres. 15) E. guerrerensis Wappes & Santos-Silva, 2020, female from Mexico (Jalisco, near La Cumbre), head, dorsal view.

FIGURES 20–23. Eupogonius pulcher sp. nov., holotype male. 20) Dorsal habitus; 21) Lateral habitus; 22) Ventral habitus; 23) Head, frontal view.