Estoloides schusteri, Santos-Silva & Wappes & Galileo, 2018

Santos-Silva, Antonio, Wappes, James E. & Galileo, Maria Helena M., 2018, Descriptions and synonymies in American Desmiphorini (Coleoptera, Cerambycidae, Lamiinae), Zootaxa 4375 (4), pp. 451-501 : 464-466

Estoloides schusteri sp. nov.

( Figs 83–86 )

Description. Male. Integument entirely dark brown, almost black.

Head. Frons and vertex coarsely, abundantly punctate, distinctly sparser close to prothoracic margin; with yellowish brown pubescence (most setae more yellowish white toward its apex), sparser toward clypeus and sides of frons, more yellowish white toward prothoracic margin and close to lower eye lobes, not obscuring integument, with moderately long, suberect yellow setae interspersed throughout, a few long, erect brown setae close to lower eye lobes, and a few long, erect yellow setae close to upper eye lobes. Area behind upper eye lobes impunctate; with yellowish white pubescence partially obscuring integument, whiter on narrow band close to eye. Area behind lower eye lobes, close to eye, tumid; finely punctate on tumid area close to upper eye lobe, gradually coarser toward gena; area between tumid region and prothoracic margin finely, abundantly punctate (punctures becoming absent toward gena); tumid area with narrow, yellowish white pubescent band close to eye, slightly more yellowish brown on remaining surface, with sparse, long, erect yellow setae interspersed close to eye; remaining surface glabrous. Antennal tubercles minutely, densely punctate; with sparse yellowish brown pubescence, with a few long, erect yellow setae interspersed. Median groove slightly distinct from clypeus to prothoracic margin. Genae finely, transversely striate on basal half, minutely punctate on distal half except on smooth area close to apex, and a single moderately coarse puncture centrally; with moderately dense yellowish white pubescence close to eye, sparser toward apex, with a few long, erect yellow setae interspersed ventrally. Gulamentum smooth and glabrous except area close to mentum somewhat micropunctate and with narrow transverse carina centrally (area between carina and mentum interspersed with coarser, shallow punctures), and sparse yellowish white pubescence, with long, erect, sparse yellow setae interspersed. Labrum convex on basal 2/3, inclined on distal third; minutely, abundantly punctate throughout, with slightly coarser punctures interspersed on area close to inclined region; with short and long, erect, sparse yellowish white setae dorsally, and fringed with golden setae at distal margin. Distance between upper eye lobes 0.68 times length of scape (3.1 times width of one lobe); in frontal view, distance between lower eye lobes 1.05 times length of scape. Antennae 2.2 times elytral length, reaching elytral apex at middle of antennomere VII. Scape gradually widened internally; densely, minutely punctate, with some coarser punctures interspersed dorsally; with yellowish brown pubescence, not obscuring integument, whiter on narrow distal band; with long, erect yellow setae on distal third ventrally. Antennomeres III–XI with yellowish brown pubescence not obscuring integument, except basal ring with white pubescence; antennomeres III–XI with long, erect yellow setae ventrally, gradually shorter and sparser toward XI. Antennal formula (ratio) based on length of antennomere III: scape = 0.55; pedicel = 0.14; IV = 1.05; V = 0.71; VI = 0.68; VII = 0.64; VIII = 0.57; IX = 0.55; X = 0.50; XI = 0.59.

Thorax. Prothorax, maximum width 1.3 times wider than long (including lateral tubercles); lateral tubercles large, placed at middle, with apex acute. Pronotum with three low, slightly marked gibbosities, one elongate placed centrally on basal half, one subcircular on each side just after middle; coarsely, abundantly punctate except on smooth gibbosities; pubescence yellowish white interspersed with yellowish brown pubescence, partially obscuring integument laterally and on basal half, with short, erect and suberect yellow setae interspersed. Sides of prothorax nearly smooth basally, coarsely, abundantly punctate on wide central area, nearly smooth on wide, oblique area from procoxal cavity to distal margin; pubescence and setae as on pronotum, but distinctly exposing punctures. Prosternum coarsely, sparsely punctate; with yellowish white pubescence not obscuring integument, sparser toward central area. Prosternal process widely depressed centrally, somewhat rugose; with yellowish white pubescence not obscuring integument, with long, erect yellowish white setae interspersed. Mesoventrite smooth, glabrous centrally, finely punctate, with yellowish white pubescence laterally. Mesanepisternum and mesepimeron with pale yellowish brown pubescence, except small glabrous areas exposing shallow punctures. Metanepisternum and sides of metaventrite with pale yellowish brown pubescence, except glabrous areas surrounding punctures, with long, erect yellowish white setae interspersed; central area of metaventrite nearly smooth and glabrous. Scutellum with yellowish brown pubescence partially obscuring integument. Elytra. Coarsely, abundantly punctate, more densely on base; pubescence pale yellowish brown with numerous, irregular spots with grayish white pubescence interspersed, forming irregular bands; with moderately long, erect yellow setae throughout; apices individually rounded. Legs. Femora with pale yellowish white pubescence partially obscuring integument, with abundant, small, subcircular glabrous areas interspersed.

Abdomen. Ventrites with yellowish white pubescence not obscuring integument, pubescence denser laterally and interspersed with abundant, small, subcircular glabrous areas. Distal margin of ventrite V concave centrally.

Female. It differs from male by the wider body, shorter antennae (1.4 times elytral length, reaching elytral apex at apex of antennomere X), and distal area of abdominal ventrite V depressed.

Dimensions (mm), holotype male/ paratype males/ paratype females. Total length, 11.47/9.18–11.52/9.81– 13.90; prothoracic length, 2.25/1.71–2.11/1.73–2.43; basal prothoracic width, 2.30/1.84–2.29/1.93–2.72; distal prothoracic width, 2.12/1.62–2.07/1.67–2.36; maximum prothoracic width (between apices of lateral tubercles), 2.80/2.20–2.97/2.56–3.46; humeral width, 3.37/2.61–3.37/2.97–4.32; elytral length, 8.05/6.61–8.01/6.97–10.21.

Type material. Holotype male from GUATEMALA, El Progreso: 21 km N Estancia de la Virgen (6000’), 03.VI.1991, J. E. Wappes col. ( FSCA) . Paratypes – GUATEMALA, Baja Verapaz: vic. Biotopo del Quetzal (5200’), 2 females, 25.V–1.VI.1989, Giesbert col. ( FSCA) ; 2 males, 1 female, 6–13.V.1991, Giesbert col. (FSCA); 1 male, 1 female, 1–15.VI.1991, Giesbert col. (MZSP). El Progreso: 22 km N Estancia de la Virgen (6000’), 8 males, 1 female, 3.VI.1991, Giesbert col. (7 males, 1 female, FSCA; 1 male, MZSP) ; Finca las Ilusiones (1900 m), 1 male, 29.V.1997, Giesbert col. ( FSCA) . Zacapa: vic. San Lorenzo (5800’), 1 female, 10–15.VI.1991, Giesbert col. ( FSCA) ; 22 km E Estancia Virgen (6000’), 2 males, 2 females, 3.VI.1991, Giesbert col. (1 male, 1 female, FSCA, 1 male, 1 female, ACMT) ; Sierra de Los Minas (El Naranjo; S slope below San Lorenzo Mine ; 15.07329 / - 89.68481; 1600–1700 m), 2 females, 21–24.V.2010, P. Skelley col. ( FSCA) .

Etymology. Named in recognition of Jack Schuster, expert on Passalidae , and Professor at Universidad del Valle de Guatemala, Guatemala City, Guatemala who so kindly assists visiting researchers with needed permits to collect and export their research specimens.

Remarks. Estoloides schusteri sp. nov. is similar to E. leucosticta ( Bates, 1885) , but differs primarily by the white pubescent spots on the elytra being more abundant and forming irregular bands. In E. leucosticta ( Fig. 87 ) the white pubescent spots on the elytra are isolated, and somewhat aligned in rows. Furthermore, the dorsal punctures are finer and denser in E. schusteri than E. leucosticta and its’ antennae longer.

According to Breuning (1974a) on E. leucosticta ( Fig. 87 ) (translated): “elytra sprinkled with rows of numerous very small white spots, on each elytron forming 8 longitudinal series.” As Bates (1885) did not record anything about the number of lines formed by the white spots, we can infer that Breuning examined at least one specimen of this species. As Breuning (1974a) also gave the dimensions of the specimen: length, 11 mm; width, 3.75 mm ( Bates 1885 gave only the length: 5 ½ lin. [11.64 mm]), it is plausible that the specimen examined by Breuning (1974) was the holotype.

Figures

FIGURES 80–87. 80–82, Estoloides noguerai: 80, paratype male from Nicaragua, dorsal habitus; 81, paratype female, dorsal habitus; 82, paratype female, ventral habitus. 83–86, Estoloides schusteri, holotype male: 83, head, frontal view; 84, dorsal habitus; 85, ventral habitus; 86, lateral habitus. 87, Estoloides leucosticta, holotype male, dorsal habitus.