Eupogonius guerrerensis Wappes and Santos-Silva, 2020

Wappes, James E. & Santos-Silva, Antonio, 2020, Nomenclatural notes on some currently known species of Eupogonius LeConte, 1852 (Coleoptera: Cerambycidae: Lamiinae) and description of seven new species, Insecta Mundi 748, pp. 1-30 : 10-12

Eupogonius guerrerensis Wappes and Santos-Silva , sp. nov.

( Fig. 51–54 )

Description. Male. Integument mostly almost black; antennae gradually dark brown toward distal segments; elytra with irregular dark reddish-brown areas; palpomeres dark brown with yellowish-brown apex; tarsi dark brown, slightly reddish on tarsomeres III–V. General pubescence light yellowish-brown.

Head. Frons finely, abundantly punctate; pubescence not obscuring integument, denser close to eyes, on longitudinal central area, and close to clypeus; with long, erect, abundant yellowish setae interspersed (erect setae white or yellowish depending on angle of light source), and a few long, erect brown setae close to eyes. Vertex with sculpturing as on frons (punctures gradually sparser toward prothoracic margin); pubescence dense close to eyes, sparser toward prothoracic margin, except slightly denser in central area, with long, erect brown setae interspersed. Area behind eyes finely, abundantly punctate, except smooth area close to prothoracic margin; with dense pubescence on punctate area, glabrous on smooth area; with long, erect setae close to eye, brown behind upper eye lobe, yellowish behind lower eye lobe. Genae finely, sparsely punctate toward inferior surface, smooth toward clypeus and apex; pubescence partially obscuring integument, with a few long, erect yellowish setae interspersed, apex glabrous. Antennal tubercles on frontal area with sculpturing as on frons, posterior area nearly smooth; pubescence not obscuring integument, with long, erect, both yellowish and brown setae interspersed. Distance between upper eye lobes 0.34 times length of scape; in frontal view, distance between lower eye lobes 0.86 times length of scape. Antennae 1.95 times elytral length, reaching elytral apex at basal third of antennomere VII. Scape distinctly widened from base to anterior third, nearly parallel-sided toward apex; with yellowish-white pubescence not obscuring integument, with long, erect both brown and yellowish setae interspersed. Antennomeres III–IV with sparse white pubescence on anterior 3/4, brown on posterior quarter, with long, erect, abundant brown setae interspersed throughout (longer ventrally). Antennomeres V–IX with narrow basal white pubescent ring, with brown pubescence on remaining surface, with minute white setae interspersed; with long, erect brown setae ventrally, gradually sparser toward IX. Antennomeres X–XI brown pubescent, with minute white setae interspersed, except apex of XI with moderately long, abundant yellowish-white setae. Antennal formula (ratio) based on length of antennomere III: scape = 0.57; pedicel = 0.14; IV = 0.98; V = 0.40; VI = 0.38; VII = 0.36; VIII = 0.34; IX = 0.29; X = 0.28; XI = 0.28.

Thorax. Prothorax wider than long (including lateral tubercles); sides with small, distinct conical tubercle at middle. Pronotum coarsely, abundantly punctate; with dense pubescent band laterally, slightly sparser toward sides of prothorax, projected toward central area on anterior third (slightly sparser on this projection), with small, triangular, moderately dense macula centrally on posterior quarter, distinctly sparser on remaining surface; with long, erect, brown and yellowish setae interspersed. Sides of prothorax with sculpturing as on pronotum; with dense pubescence nearly obscuring integument, with long, erect yellowish setae interspersed (whiter depending on light intensity). Prosternum coarsely, sparsely punctate on posterior 3/4, distinctly sparser on anterior quarter; pubescence partially obscuring integument on posterior 3/4, especially laterally, sparser on anterior quarter; with long, erect, sparse yellowish setae interspersed. Ventral surface of meso- and metathorax with abundant pubescence, partially obscuring integument on some areas, distinctly sparser on central area of mesoventrite; sides coarsely, moderately sparsely punctate. Scutellum with pubescence not obscuring integument, denser along margins. Elytra. Coarsely, abundantly punctate on basal half, slightly, gradually finer and sparser toward apex; with dense pubescence on irregular areas, sparser or very sparse in others, with long, erect brown setae interspersed. Legs. Femora with pubescence abundant, but not obscuring integument, with long, erect yellowish setae interspersed. Tibiae with white pubescence not obscuring integument dorsally and laterally, distinctly yellower ventrally, and on dorsal surface of distal half of mesotibiae; with long, erect, both brown and yellowish setae interspersed. Tarsi with white pubescence dorsally.

Abdomen. Ventrites with abundant pubescence not obscuring integument, denser along apex of ventrites I–IV, with long, erect yellowish setae interspersed.

Dimensions (mm). Total length, 7.30; prothoracic length, 1.45; anterior prothoracic width, 1.40; posterior prothoracic width, 1.45; maximum prothoracic width, 1.85; humeral width, 2.25; elytral length, 5.10.

Type material. Holotype male from MEXICO, Guerrero: Hwy 200, 31 km NE Ixtapa, 17–20.VII.1985, J.E. Wappes col. ( FSCA, formerly ACMT).

Remarks. Eupogonius guerrerensis sp. nov. is similar to E. pauper LeConte,1852 , but differs by the shorter distance between upper eye lobes (about equal to widest diameter of the scape), while in E. pauper the distance is distinctly wider (about twice the largest diameter of the scape). It differs from E. nigritarsis Fisher, 1926 by the basal antennomeres not bicolorous (bicolorous in E. nigritarsis ), pronotum without smooth central area (present in E. nigritarsis ), and elytra lacking white pubescence (present in E. nigritarsis ). Eupogonius guerrerensis differs from E. pilosulus (Chevrolat, 1862) by the basal antennomeres not bicolorous (bicolorous in E. pilosulus ), and sparsely punctate (punctation distinctly denser throughout in E. pilosulus ). It also differs from E. stellatus Chemsak and Noguera, 1993 , by the more apically expanded and less cylindrical scape (more evenly cylindrical in E. stellatus , fig. 16), lateral tubercle of the prothorax more prominent and conical (lower and apex rounded in E. stellatus ), and body with sparse long white setae (abundant in E. stellatus ).

Etymology. This new species, “ guerrerensis ”, is named for the Mexican State (Guerrero) where it was collected.

Figures

Figures 51–58. Eupogonius spp. 51–54) Eupogonius guerrerensis. holotype male. 51) Dorsal habitus. 52) Ventral habitus. 53) Lateral habitus. 54) Head, frontal view. 55–58) Eupogonius boteroi holotype female. 55) Dorsal habitus. 56) Ventral habitus. 57) Lateral habitus. 58) Head, frontal view.