Solierodes rousseli ( Solier, 1849 ) Ruta, 2021

Ruta, Rafał, 2021, Three new genera of large marsh beetles (Coleoptera: Scirtidae) from Valdivian temperate rain forests of southern South America, Zootaxa 5048 (4), pp. 451-485 : 460-461

Solierodes rousseli ( Solier, 1849) comb. nov.

( Figs 1C–E , 2B , 4B , 6A , 7–9 )

Elodes rousselii Solier, 1849: 460

Type material. Lectotype ( MNHN, Fig. 6A ): “ Elodes \ rousseli Sol \ Calbuco” [handwritten with brown ink, probably by Solier]; “dans les broussailles, \ sur les arbres - \ contrefaît très bien \ le mort en applicant \ et tête et pattes sur le \ ventre. \ Calbuco. Mauldler” [handwritten with brown ink, probably by Solier]; “9 \ 45” [handwritten on a green, round label]. The specimen is missing head and pronotum, and lateral portion of its right elytron is damaged.

Additional material studied. 1 male ( MNHN): “1362” [handwritten, without other labels]. 1 male ( DBET): “ CHILE CW, reg. IX \ SE of NUEVA TOLTÉN \ BOROA CENTRAL \ 22.I.2004 \ LGT M. SNIŽEK ”. 2 males ( EMEC): “54- CHILE X REGION \ Oncol Park, Fogging 14:36 PM \ 300cc/l, 08.I. 2007, 576m 19° C \ S39°41.973 / W73°18.917 \ Saxegothaea conspicua 40m \ Arias et al UC Berkeley”; “ Scirtidae \ Genero sp. 4 \ det. G. Arriagada 2007” . 1 female ( NHM): “ CHILE: Reg. XI \ Queulat N. P. \ D. Inward ”; “ Litter transect \ 3: 84 m. \ xi.2003 ”; “Scirt \ 2” . 1 female ( CMNH): “ Prov. AYSEN \ 10 Km. N. Pto. Ibanez \ 14.17 Enero 1961 \ Coll: L. E. Pena ” . 1 male ( FMNH): “ CUCAO \ Is. Chiloe \ 15-23-II-81 \ Coll. M. Marin ”; “FMNH, 1986 \ L. Peña Coll. \ Acc. # 17-422” . 7 males ( FMNH): “ Pto. Cisnes \ Aysen II 1961 \ Coll. L. E. Peña ”; “FMNH, 1986 \ P. Peña Coll. \ Acc. #17-422” .

Diagnosis. Large beetles with subparallel body; pronotum in males narrower than base of elytra; elytra covered with distinct setation. Parameroids of penis with subparallel sides, trigonium with two processes, parameres long, with serrate margins. Pronotum of females only slightly narrower than base of elytra, with tubercles in posterior portion.

Description. Male. Body large (TL 9.5–10.7 mm), elongate (TL/EW 2.0–2.2), widest in the posterior portion of elytra, moderately convex. Colouration chestnut brown, head covered with relatively long setae, pronotum covered with long, dense setae, elytra covered with shorter and sparser setae than pronotum, setation of elytra recumbent, patchy—yellowish with small black spots. Head ca. 1.3× wider than long, ca. 1.6× wider than interocular space, covered with coarse punctation, punctures separated by 0.2–0.3× diameter of a puncture; frons with two elongated depressions; eyes large, protuberant. Pronotum transverse (PW/PL 1.9–2.2), punctation dense, punctures on disc separated by 0.3–0.5× diameter of a puncture, punctures on lateral portion confluent. Elytra long (8.30–9.40 mm), punctures small, separated by ca. the diameter of a puncture, space between punctures matt. Aedeagus symmetrical, penis ( Fig. 8A ) large (L 1.83 mm, W 0.43 mm), dorsoventrally flattened; trigonium as long as pala, bifid, processes of trigonium very narrow; parameroids longer than pala and trigonium, with subparallel sides, rounded at apices, outer margins serrate in apical portions. Tegmen ( Fig. 8B ) large (L 1.70 mm, W 1.07 mm), widely u-shaped; parameres relatively wide at bases, regularly narrowing in basal halves and subparallel in apical halves, apices pointed on the outer margin and rounded on the inner margin, with few short setae. Sternite VIII ( Fig. 8C ) (L 0.83 mm, W 1.03 mm) widely u-shaped, with sparse setation at apex; sternite IX ( Fig. 8D ) (L 1.36 mm, W 0.73 mm) oval, consisting of two elongated, subtriangular hemisternites, apical 1/3 covered with setae. Tergite VIII ( Fig. 8E ) (L 1.40 mm, W 1.00 mm) with apodemes shorter than apical plate, apical plate oval, covered with short setae, with rounded margin. Tergite IX ( Fig. 8F ) (L 0.97 mm, W 0.76 mm) with short apodemes, apical portion membranous, setation indistinct.

Female. Body large (TL 10.4–10.6 mm), setation of dorsum uniformly yellowish, more erect than in males; head with coarse, confluent punctures, frons with two oblique elevated ridges, eyes less protuberant than in males; anterior portion of pronotal disc with dual punctation: larger punctures and small, weakly impressed punctures between them, lateral sides of pronotum with coarse, confluent, granulate punctures, posterior portion of pronotum with only very weakly impressed punctures; punctures on elytra separated by ca. the diameter of a puncture, area between punctures matt; pronotum wide (PW 3.5 mm), with elevated transverse ridge in posterior portion ending on sides with subconical tubercles; lateral sides of elytra subparallel; abdominal ventrite 4 with transverse patch of dense setae, ventrite 5 with subtriangular concavity ( Fig. 9D ); ovipositor long (L 6.1 mm, Fig. 9A ), without branchlets, coxites subtriangular, elongated, apices of coxites with numerous short setae, styli subapical, eaxh stylus with single patch of sensillae ( Fig. 9B ), bursal sclerite (L 1.34 mm, W 1.05 mm, width measured with membranous parts) subconical, widened in posterior portion and rounded in anterior part, surrounded with membranes ( Fig. 9C ).

Measurements and ratios. Males (n = 10) TL 9.50–10.70 mm (10.10 mm), PL 1.35–1.70 mm (1.52 mm), PW 2.90–3.50 mm (3.10 mm), EL 8.30–9.40 mm (8.81 mm), EW 4.50–5.10 mm (4.83 mm), TL/EW 2.0–2.2 (2.1), PW/PL 1.9–2.2 (2.1), EL/EW 1.8–1.9 (1.8), EL/PL 5.0–6.3 (5.8), EW/PW 1.4–1.6 (1.5). Females (n = 2) TL 10.40–10.60 mm (10.50 mm), PL 1.70 mm, PW 3.50 mm, EL 8.90–9.00 mm (8.95 mm), EW 4.60–4.70 mm (4.65 mm), TL/EW 2.3, PW/PL 2.1, EL/EW 1.9, EL/PL 5.2–5.3 (5.3), EW/PW 1.3.

Distribution. A rather rare species, known from scattered localities in the regions Los Ríos, Los Lagos, and Aysén of Chile ( Fig. 23 ).

Figures

FIGURE 1. Dorsal view. A) Argelodes magnificus sp. nov.; B) A. magnificus, close-up of head and pronotum; C) Solierodes rousseli (Solier), male; D) S. rousseli, female; E) S. rousseli, female, close-up of head and pronotum. Scale bars (A, C, D) = 3.0 mm.

FIGURE 2. Ventral view, SEM images. A) Argelodes magnificus sp. nov.; B) Solierodes rousseli (Solier).

FIGURE 4. Wings.A) Argelodes magnificus sp. nov.; B) Solierodes rousseli (Solier); C) Mucronotus velutinus (Solier).Abbre- viations: AA—anterior anal vein, AP—posterior anal vein, CuA—anterior cubital vein, CuA+AA1+2—fusion of anterior cubital and anterior anal veins, MP—posterior medial vein, r3—third radial cross-vein, RA—anterior radial vein, rp-mp2—second radio-medial cross-vein, ScP—posterior subcostal vein.

FIGURE 6. Labels. A) Solierodes rousseli (Solier), lectotype; B) Mucronotus schwabei (Pic), lectotype; C) M. schwabei (Pic), paralectotype; D) M. schwabei (Pic), paralectotype.

FIGURE 7. Solierodes rousseli (Solier), mouthparts. A) mandible, molar region enlarged; B) labium; C) maxilla.

FIGURE 8. Solierodes rousseli (Solier), male. A) penis; B) tegmen; C) sternite VIII; D) sternite IX; E) tergite VIII; F) tergite IX. Scale bar = 0.5 mm.

FIGURE 9. Solierodes rousseli (Solier), female.A) genital tract; B) coxites, close-up; C) bursal sclerite; D) abdominal ventrites 4 & 5, setal patch visible. Abbreviations: as—apical setae, bscl—bursal sclerite, bsl—bursella, gla—gland, sen—sensillae, st—styli. Scale bar = 1.0 mm (figures B, C, D—not to the scale).

FIGURE 23. Distribution of Argelodes gen. nov., Mucronotus gen. nov., and Solierodes gen. nov.