Heilus rosadonetoi Lira, De Sousa & Marques, 2023

Lira, Aline De Oliveira, Sousa, Wesley Oliveira De & Marques, Marinêz Isaac, 2023, Four new species of Heilus Kuschel 1955 (Curculionidae, Molytinae, Molytini, Hylobiina) from Brazil, Zootaxa 5336 (2), pp. 206-216 : 208

Heilus rosadonetoi Lira, De Sousa & Marques sp. nov.

( Figures 1A–I )

http://zoobank.org/ urn:lsid:zoobank.org:act:DC518117-41EE-4933-95EA-DEE28A19A644

Diagnosis. This new species is distinguished from other Heilus species by the following combination of characters: length varying between 7.3 and 9.7 mm; pronotum with oblique granules; elytra with rounded macules of black velvety scales located between striae 3 and 5; aedeagus apically with two tufts of long setae laterally and one tuft centrally, bifurcate endophallite, broadest at base with two pointed projections at apex; tegmen with small triangular projection between dorsal lobes. Heilus rosadonetoi sp. nov. is most similar to H. inaequalis but can be distinguished from that species by smaller size, shorter rostrum, and position of the maculae positioned between striae 3 and 5, which in H. inaequalis are positioned between striae 3 and 4.

Description. ( Figs. 1A–B ) Length (pronotum and elytra) of males and females 7.3 to 9.7 and 8.2 to 10.0 mm, respectively. Integument. Opaque, dark brown, legs dark reddish-brown. Rostrum 1.1 times longer than pronotum; about 5.3 times longer than apical width in females and 4.1 times longer in males. Eyes. Interorbital distance varying from 0.1 to 0.3 mm. Thorax. Pronotum 1.3 times wider than long, rounded sides, narrow at apex, covered by oblique granules; with bright yellowish scales. Elytra. Approximately 1.9 times longer than width across humeri, moderately convex, apex rounded; with transverse granules in some specimens forming transverse rows at base of elytra; covered by bright, yellowish scales; rounded maculae of variable size located between striae 3 and 5, with black velvety scales; interstriae flat, punctate, stria 9 with deep punctation; apical callus elevated, with tuft of whitish scales. Male genitalia ( Figs. 1C–E ). Aedeagus with apodemes about 1.3 times longer than median lobe; apical margin rounded, narrow, with two tufts of long setae laterally, one tuft centrally; enlarged towards base of aedeagus; bifurcate endophallite, broadest at base, with two pointed projections at apex. Tegmen with dorsal lobes, manubrium elongate; manubrium about 1.3 times longer than dorsal lobes; small triangular projection between dorsal lobes. Female genitalia ( Figs.1F–I ). Coxites subtriangular; styli cylindrical, with elongate setae at apex; spermathecal duct short, inserted at posterior third of bursa copulatrix; spermathecal capsule robust, curved, collum elongate, ramus non-prominent; spermathecal gland not observed. Abdominal tergite VIII subtriangular, apex with elongate dense setae. Abdominal sternite VIII with apical lobes 1.3 times wider than long; spiculum ventrale straight, about 2 times longer than apical lobes, slightly enlarged at apex.

Measurements (mm): Males/females, respectively. TBL: 7.3–9.7/8.2–10.0; TRL: 1.9–2.3/2.0–2.7; MHx: 2.6– 3.1/2.9–3.3; RAW: 0.4–0.6/0.4; RBW: 0.4–0.6; IO: 0.1–0.3/0.3; PnL: 1.7–2.3/2.1–2.7; PnMW: 2.3–2.9/2.8–3.2; PnBW: 1.2–1.6/1.4–1.7; EL: 5.3–6.6/4.7–6.4; EW: 2.7–3.3/2.9–3.6.

Type material. Holotype male [printed label with red border] ( MCN); BRAZIL: Rio Grande do Sul, Cambará do Sul, 19–21.xii.1994, L. Moura leg., Col. MCN 155656 , Heilus sp. 2 Lira, A.O. det. 2020 . Paratypes (4 males, 3 females) [printed label with black border]: Rio Grande do Sul: 1 male, Derrubadas (P. E. do Turvo) 21.x.2004, A. Barcellos col., Col. MCN 230668 , Heilus sp. 2 Lira, A.O. det. 2020 ( MCN) ; 1 male, Porto Alegre ( Serraria ), 17.ix.2003, I. Heydrich, Col. MCN 222689 , Heilus sp. 2 Lira, A.O. det. 2020 ( MCN) ; 1 male, Triunfo ( Copesul ), 6.i.2005, A. Barcellos col., Col. MCN 232789 , Heilus sp. 2 Lira, A.O. det. 2020 ( MCN) ; 1 male, Triunfo (Copesul) 30.xii.2004, R.S. Araujo col., Col. MCN 232275 , Heilus sp. 2 Lira, A.O. det. 2020 ( MCN) ; 1 female dissected, Eldorado do Sul ( Faz. Kramm ) 29.x.1998, L. Moura col., Col. MCN 161.324 , Heilus sp. 2 Lira, A.O. det. 2020 ( MCN) ; 1 female, Canoas ( REFAP ), 28.I.1991, V. Pitoni leg., Col MCN 238576 Heilus sp. 2 Lira, A.O. det. 2020 ( MCN) ; 1 female Triunfo ( Copesul ), 29–30.x.2008, M. Pasolius col., Col. MCN 236406 , Heilus sp. 2 Lira, A.O. det. 2020 ( MCN) .

Geographical distribution. This species is recorded from Brazil in Rio Grande do Sul state.

Etymology. The specific epithet is a genitive noun honoring Dr. Germano Henrique Rosado-Neto for his significant contribution to the taxonomy of beetles, especially to weevil studies in Brazil.

Figures

FIGURE 1. Heilus rosadonetoi, paratype male: A. Dorsal view. B. Lateral view. C.Aedeagus. D. Endophallite. E. Tegmen. F. Female genitalia. G. Spermathecal capsule. H. Abdominal tergite VIII. I. Abdominal sternite VIII.