Heilus iniquus ( Kirsch, 1874 )

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 : 175-177

Heilus iniquus ( Kirsch, 1874)

( Figs. 15 , 18K , 19J , 20J , 21J , 22J , 23K )

Heilipus iniquus Kirsch, 1874:403 (description); Blackwelder 1947:818 (checklist).

Hilipus iniquus: Dalla Torre et al. 1932:31 (catalog).

Heilus iniquus: Kuschel 1955:297 (combination); Wibmer & O’Brien 1986:145 (checklist). Type material. Heilipus iniquus Kirsch, 1874 : we examined images of the holotype ( Fig. 15 ), sex undetermined, bearing the following label “Pozuzu Kirsch; H63; Type; Staatl. Museum fur Tierkunde, Dresden; Heilipus iniquus Ksch ; Heilus iniquus (Kirsch) Kuschel det. 1960”, deposited in the SGND.

Redescription. Length (elytra and pronotum) of males and females 8.7 to 11.4/ 9.4 to 11.1 mm, respectively. Integument bright black, antennae reddish-brown. Rostrum about 1.1 times longer than the pronotum. Thorax. Pronotum ( Figs. 15 A–B) about 1.3 times wider than long, rounded sides, oblique granules visible near apex and on sides of pronotum, lateral transverse granules; densely covered by scales, mostly dark brown, small clusters of yellow setae distributed between dark brown setae, bands of yellow scales on sides and center of pronotum, accompanying setae of scutellum and humeri. Elytra ( Figs. 15 A–B) about 1.6 times longer than wide, slight depression in posterior region of humeri, near elytral suture, transverse granules in interstriae and covering humeri; densely covered in interstriae by short, brown scales, clusters of black scales distributed randomly between the brown scales, longitudinal bands of yellowish scales in basal region of elytra covering humeri, transverse band of yellow scales covering entire elytra in anterior region, near apical elytral calli, interrupted in striae; elytral striae with fine punctures, interstriae flat. Male genitalia. Median lobe of aedeagus ( Fig. 18K ) with trapezoidal apex and two lateral short setae tufts, subparallel sides; median lobe apodemes and median lobe subequal in length; internal sac sclerite with two acute projections, wrapped by fine spicules ( Fig. 19J ). Tegmen ( Fig. 20J ) with elongate dorsal lobes, about 1.2 times longer than manubrium. Female genitalia ( Fig. 21J ). Coxites with short setae at apex; styli with apex densely covered by elongate setae. Spermathecal duct short inserted into median third of bursa copulatrix. Spermathecal capsule curved ( Fig. 22J ), ramus poorly developed; collum curved; cornu with tapered apex; spermathecal gland elongate, poorly dilated at base, narrowing toward apex.

Dimensions (mm). Males/females, respectively. TBL: 8.7–11.4/9.4–11.1; TRL: 2.5–3.4/2.9–3.5; MHx: 3.7– 5.0/4.0–4.9; RAW: 0.7/0.7; RBW: 0.7–0.8/0.7–0.8; IO: 0.4/0.4; PnL: 2.4–3.0/2.5–3.1; PnMW: 3.2–4.1/3.4–4.1; PnBW: 3.0–3.9/3.2–3.8; EL: 6.5–8.2/6.7–8.1; EW: 4.1–5.3/4.2–5.2.

Non-type material examined. In total, 18 specimens were examined. BRAZIL (New record), Amazonas: Borba , AM, 1♀, v.1943, A. Parko ( MNRJ) , Curari, AM, 1♀, 4.ii.1980, Robin Best ( INPA) ; Pará: Itaituba, PA, 1♀, iv.1963, A. Maller ( DZUP) , 1♀, vi.1962, A. Maller ( DZUP) , Jacareacanga , PA, 1♂, iv.1969, F.R. Barbosa ( DZUP) , Serra Norte , PA, 1♀, 1♂, 14–17.viii.1984, trap (20m) ( MPEG) , Traíra–Óbidos, PA, 1♀, xii.1961, Dirings ( MZSP) ; Acre: Rio Branco, AC, 1♂, 6.x.1992, V. Silva ( MZSP) ; Rondônia: Ouro Preto do Oeste, RO, 1♀, 25–28.viii.1986, F.F. Ramos, trap (1,6m) ( MPEG) , Ouro Preto d’Oeste, RO, 1♂, 18.x.1987, C. Elias ( DZUP) , 2♀, 1♂, 29.x.1987, C. Elias ( DZUP) , Porto Velho , RO, 1♀, 14.ix.2012, R.J. Silva ( CEMT) , 1♀, 19.ii.1979, J. Campbell ( INPA) , 1♀, 9.ii.1979, J. Arias ( INPA) . Undefined locality: RR, 1♀, 2–13.v.1987, J.A. Rafael, J.E.B. Brasil & L.S. Aquino ( INPA) .

Geographical distribution. According to Wibmer & O’Brien (1986), H. iniquus is distributed only in Peru and Bolivia. This study presents the first records of this species in the Brazilian Amazon Forest, in the states of Roraima, Amazonas, Pará, Acre, and Rondônia ( Fig. 23K ).

Associated plants. An adult specimen from the MZSP collection was collected in Rio Branco (Acre) on Theobroma grandiflorum (Willd. ex Spreng.) K. Schum. (Malvaceae) .

Remarks. Heilus iniquus is distinguished from the other species by the dark and opaque integument, the yellow condensed scales forming a transverse band at the base, and another at the posterior third interrupted by the striae.

Figures

FIGURE 15. Holotype Heilus iniquus, undetermined sex. A. dorsal view. B. lateral view. C. labels. The copyright of images belongs to SGND.

FIGURE 18. Aedeagus. A. Heilus inaequalis, dorsal view. B. Heilus inaequalis, lateral view. C. Heilus pupillatus. D. Heilus tuberculosus. E. Heilus rufescens. F. Heilus freyreissi. G. Heilus myops. H. Heilus faldermanni. I. Heilus ochrifer. J. Heilus fasciculatus. K. Heilus iniquus. L. Heilus bistigma. Legends: median lobe (ml), internal sac sclerite (sc), median lobe apodemes (mla).

FIGURE 19. Internal sac sclerite. A. Heilus inaequalis. B. Heilus pupillatus. C. Heilus tuberculosus. D. Heilus rufescens. E. Heilus freyreissi. F. Heilus myops. G. Heilus faldermanni. H. Heilus ochrifer. I. Heilus fasciculatus. J. Heilus iniquus. K. Heilus bistigma.

FIGURE 20. Tegmen. A. Heilus inaequalis. B. Heilus pupillatus. C. Heilus tuberculosus. D. Heilus rufescens. E. Heilus freyreissi. F. Heilus myops. G. Heilus faldermanni. H. Heilus ochrifer. I. Heilus fasciculatus. J. Heilus iniquus. K. Heilus bistigma. Legends: dorsal lobe (ld), manubrium (m).

FIGURE 21. Female genitalia. A. Heilus inaequalis. B. Heilus pupillatus. C. Heilus tuberculosus. D. Heilus rufescens. E. Heilus freyreissi. F. Heilus myops. G. Heilus faldermanni. H. Heilus ochrifer. I. Heilus fasciculatus. J. Heilus iniquus. K. Heilus bistigma. Legends: coxite (cx), styli (st), common oviduct (co), bursa copulatrix (bc), spermathecal duct (spd), spermathecal capsule (sp), spermathecal gland (spg).

FIGURE 22. Spermathecal capsule. A. Heilus inaequalis. B. Heilus pupillatus. C. Heilus tuberculosus. D. Heilus rufescens. E. Heilus freyreissi. F. Heilus myops. G. Heilus faldermanni. H. Heilus ochrifer. I. Heilus fasciculatus; J. Heilus iniquus; K. Heilus bistigma. Legends: cornu (cr), collum (cl), ramus (ra).

FIGURE 23. Geographical distribution of Heilus species based on labels information. A. South America Brazilian biomes and Paraguayan and Argentine ecoregions. B. Heilus inaequalis; C. Heilus pupillatus; D. Heilus tuberculosus; E. Heilus rufescens; F. Heilus freyreissi; G. Heilus myops; H. Heilus faldermanni; I Heilus ochrifer; J. Heilus fasciculatus; K. Heilus iniquus; L. Heilus bistigma.