Heilus rufescens ( Boheman, 1836 )

Lira, Aline De Oliveira, Sousa, Wesley Oliveira De, Rosado-Neto, Germano Henrique, Santos, Geane Brizzola Dos & Marques, Marinêz Isaac, 2020, A review of the South American species of Heilus Kuschel, 1955 (Curculionidae Molytinae: Molytini: Hylobiina) with emphasis on those from Brazil, Zootaxa 4861 (2), pp. 151-187 : 165

publication ID	https://doi.org/ 10.11646/zootaxa.4861.2.1
publication LSID	lsid:zoobank.org:pub:275A17F8-FA56-49A4-8EFA-8BF991E386C8
DOI	https://doi.org/10.5281/zenodo.4414603
persistent identifier	https://treatment.plazi.org/id/03B80020-226E-FFD3-FF66-2737FF27FF3C
treatment provided by	Plazi
scientific name	Heilus rufescens ( Boheman, 1836 )
status

Treatment

Heilus rufescens ( Boheman, 1836)

( Figs. 7 View FIGURE 7 , 18E View FIGURE 18 , 19D View FIGURE 19 , 20D View FIGURE 20 , 21D View FIGURE 21 , 22D View FIGURE 22 , 23E View FIGURE 23 )

Heilipus rufescens Boheman, 1836:190 View in CoL (description); Boheman 1843:71 (citation); Blackwelder 1947:819 (checklist).

Hilipus rufescens: Gemminger & Harold 1871:2429 View in CoL (catalog); Dalla Torre et al. 1932:35 (catalog).

Heilus rufescens: Kuschel 1955:297 (combination); Wibmer & O’Brien 1986:145 (checklist).

Type material. Heilipus rufescens Boheman, 1836 : we examined the images of the female holotype ( Fig. 7 View FIGURE 7 ), bearing the following label: “ H: rufescens ; Dej : a Brasil. Chevrolat; Typus ♀; NHRS–TOBI 000003220”, deposited in the NHRS.

Redescription. Length (pronotum and elytra) of males and females 6.9 to 7.1/ 6.6 to 8.8 mm, respectively. Integument bright, varying from dark brown to reddish-brown. Rostrum about 1.7 times longer than length of pronotum, about 6.2 times longer than apical width of rostrum in females, and about 5.05 times longer in males.

Thorax. Pronotum ( Figs. 7 View FIGURE 7 A–B) about 1.4 times wider than long, rounded sides, densely covered with rounded granules with small punctation at apical margin in center, densely covered with yellow and whitish scales, with three bands of oblong, whitish or yellowish scales, two on sides and one at center of pronotum, distributed from base to median region. Elytra ( Figs. 7 View FIGURE 7 A–B) about 1.5 times longer than wide, oblique granules, slightly elevated, each one with short scale, very distinct at apex, inserted into interstriae, more condensed in humeral region, smaller and sparse granules in apical region; densely covered with setae ranging from light yellow to dark brown, median region with irregular macula of dark brown scales between striae 2 and 5, with transverse band of yellowish setae on posterior margin, and more condensed setae in apical region; moderately coarse elytral striae, finer at apex, flat interstriae. Male genitalia. Median lobe of aedeagus ( Fig. 18E View FIGURE 18 ) with straight apex, with few setae; median lobe apodemes about 2.2 times longer than median lobe. Internal sac armed with bifurcate sclerite, with elongate spicules on sides ( Fig. 19D View FIGURE 19 ). Tegmen ( Fig. 20D View FIGURE 20 ) with manubrium about 1.8 times longer than dorsal lobes. Female genitalia ( Fig. 21D View FIGURE 21 ). Coxites longer than wide, with short setae close to insertion of styli; styli longer than wide, with elongate setae at apex. Spermathecal duct short inserted into final portion of bursa copulatrix. Spermathecal capsule ( Fig. 22D View FIGURE 22 ) slightly curved, collum narrow, ramus well-developed, robust, and rough, cornu subtriangular. Spermathecal gland elongate, enlarged at base, narrowing to apex.

Dimensions (mm). Males/females, respectively. TBL: 6.9–7.1/6.6–8.8; TRL: 3.1/2.2–3.0; MHx: 2.8–3.0/2.6– 3.5; RAW: 0.5/0.4–0.6; RBW: 0.5 /0.5–0.6; IO: 0.3/0.3–0.4; PnL: 1.6/1.3–2.0; PnMW: 2.2/2.2–2.7; PnBW: 2.1/2.1– 2.6; EL: 5.3–5.5/4.9–7.5; EW: 3.1–3.2/3.1–4.1.

Non-type material examined. In total, eight specimens were examined. BRAZIL: Espírito Santo: Rib. Engano , 1♀, x.1944, Travassos & M. Santos ( MNRJ) ; Rio de Janeiro: Corcovado , 1♀, 1.xii.1966 ( DZUP) , Floresta da Tijuca , 1♂, 15.i.1961 ( DZUP) , Rep. R. Grande , 1♀, 10.xi.1966, F.M. Oliveira ( DZUP) ; Paraná: Morretes , 1♀, 19.i.1985, C.I.I.F. ( DZUP) , 1♂, 22.xii.1984, C.I.I.F., light trap ( DZUP) ; Santa Catarina: Corupá , 1♀, xi.1951, light trap ( DZUP) , Corupá , 1♂, i.1954, A. Maller ( MNRJ) .

Geographical distribution. The species occurs in Peru, Bolivia, and Brazil ( Wibmer & O’Brien, 1986), and in the Brazilian Atlantic Forest (Espírito Santo, Rio de Janeiro, Paraná, and Santa Catarina states) ( Fig. 23E View FIGURE 23 ) .

Associated plants. Unknown.

Remarks. Heilus rufescens is one of the smallest South American species of the genus, measuring less than 8.9 mm. The main characters that distinguish H. rufescens from H. fasciculatus are the dense coating of setae on the elytra, the irregular macula in the median region of the elytra, and the band of setae on the posterior margin of the elytra. Heilus fasciculatus has less dense setae on the elytra, with scales short in the interstriae and has no apparent macula.