Eupogonius giesberti, Santos-Silva & Wappes, 2018

Santos-Silva, Antonio & Wappes, James E., 2018, A new genus, a new species, new combinations, and notes on synonymy and nomenclature in American Desmiphorini (Coleoptera, Cerambycidae, Lamiinae), Insecta Mundi 605, pp. 1-16 : 7-8

Eupogonius giesberti sp. nov.

( Fig. 36–41 )

Description. Holotype female. Head and pronotum black; ventral side of body mostly dark brown; mouthparts light reddish brown; antennae dark brown on basal segments, gradually dark reddish brown toward distal segments; elytra reddish brown; femora dark reddish brown; tibiae black on base, gradually dark reddish brown toward apex; tarsomeres dark reddish brown except claws black and distal area of tarsomere V dark brown.

Head. Frons, vertex, antennal tubercles, area behind eyes and genae with dense yellow pubescence obscuring integument, sparser on triangular area each side of center of vertex, close to prothorax, somewhat longer, perpendicular to ocular surface around eyes; with moderately abundant, long, erect, brown and yellow setae throughout. Postclypeus with decumbent, short yellow setae partially obscuring integument, with sparse long, erect dark setae interspersed laterally. Labrum coplanar on basal third with anteclypeus, inclined on distal 2/3; finely punctate on basal third, slightly more coarsely punctate on distal 2/3; with sparse, short, decumbent yellow setae on basal third, with long dark setae directed anteriorly on inclined area. Mandibles triangularly depressed, densely punctate, with dense yellow pubescence on basal half of outer side, smooth, glabrous on remaining surface. Lower eye lobes 1.65 times length of gena (area directly under lobe); with one row of ommatidia connecting lobes ( Fig. 40 ); distance between upper eye lobes 0.41 times length of scape; in frontal view, distance between lower eye lobes 1.03 times length of scape. Antennae 1.57 times elytral length, reaching elytral apex at apex of antennomere IX; with white pubescence not obscuring integument, ventrally sparser after IV, forming dorsal basal rings on antennomeres V–XI (less distinct toward XI); scape, pedicel and antennomeres III–IV with abundant, long, erect, dark setae throughout; antennomeres V–XI with long, erect dark setae ventrally, gradually sparser toward XI; antennal formula (ratio) based on length of antennomere III: scape = 0.76; pedicel = 0.11; IV = 1.05; V = 0.64; VI = 0.58; VII = 0.56; VIII = 0.52; IX = 0.46; X = 0.38; XI = 0.44.

Thorax. Prothorax slightly wider than long, sides, at about middle, barely tuberculate. Pronotum with dense yellow pubescence obscuring integument, paler basally and distally, sparser near distal margin, absent on slightly elevated, drop-shaped, gibbosity on center of basal half, one moderately large, circular depression on each side of central gibbosity, another two laterally between base and lateral tubercle, and two more between lateral tubercle and distal margin (only a small one on left side); with moderately abundant, long, erect, yellow setae throughout, except on central gibbosity; each depression with one long, erect, dark seta. Sides of prothorax with dense yellow pubescence obscuring integument. Prosternum and mesoventrite with yellowish white pubescence obscuring integument, with long, erect yellowish white setae interspersed. Mesanepisternum, mesepimeron and metanepisternum with yellow pubescence obscuring integument; metaventrite with white pubescence partially obscuring integument, yellower close to coxal cavities laterally, with long, erect, white setae interspersed. Scutellum with paler yellow pubescence obscuring integument. Elytra. Coarsely, moderately sparsely punctate on basal third, gradually finer, sparser toward apex; with grayish white pubescence partially obscuring integument, with long, erect grayish white setae interspersed; apex slightly rounded. Legs. Femora and tibiae with yellowish white pubescence partially obscuring integument, with long, erect, sparse yellowish white setae interspersed.

Abdomen. Ventrites with white pubescence nearly obscuring integument, except narrow, pale yellow pubescent band at apex of ventrites I–IV; with moderately sparse long, erect white setae; distal area of ventrite V transversely depressed, with apex truncate.

Variation. Distal antennomeres vary from light to dark reddish brown; elytra light reddish brown; femora lighter reddish brown; pronotum with one additional circular depression near central gibbosity; laterobasal depression of pronotum distinctly smaller than the others at left side; part of lateral depressions of pronotum absent.

Dimensions (mm), holotype female/ paratypes female. Total length, 10.08/8.23–8.41; prothoracic length, 2.02/1.62–1.71; basal prothoracic width, 2.09/1.68–1.71; distal prothoracic width, 1.89/1.62–1.71; maximum prothoracic width, 2.22/1.82–1.84; humeral width, 2.88/2.38–2.43; elytral length, 7.15/5.94–6.07.

Type material. Holotype female from MEXICO, Chiapas: 17 km W Tuxtla Gutiérrez (3300′), 27.VI–8. VII.1986, E. Giesbert col. ( FSCA). Paratypes— 1 female, same data as holotype ( FSCA). GUATEMALA, Huehuetenango: Finca Zapotal ( Rio Lagarteros ; 970 m), 1 female, 04.VI.1997, E. Giesbert and J. Monzon col. ( MZSP).

Remarks. Eupogonius giesberti sp. nov. differs from the other species assigned to the genus by the circular depressions on pronotum, which are absent in all other Eupogonius species. It is somewhat similar to E. pubescens LeConte, 1873 , but differs by the pubescence on head and prothorax visibly contrasting with that of the elytra (not contrasting in E. pubescens ). The circular depressions on the pronotum give the new species an appearance similar to some species of Mecas LeConte, 1852 (Phytoeciini) .

Etymology. The new species is named after Edmund Giesbert, collector of the type series, for his many, important contributions to our knowledge of American Cerambycidae .

Figures

Figures 36–41. Eupogonius giesberti, holotype female. 36) Dorsal view. 37) Ventral view. 38) Lateral view. 39) Head, frontal view. 40) Right eye. 41) Mesotibia.