Byrsopolis chassaini Soula 2010
Creators: name: Medeiros, Rone A. F.
name: Seidel, Matthias
name: Grossi, Paschoal C.
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Rutelidae
Byrsopolis
Byrsopolis chassaini

description: Byrsopolis chassaini Soula, 2010a new junior subjective synonym
Byrsopolis chassaini, 2010a: 46 (original description); Carvalho and Grossi 2018: 372 (checklist, distribution); Hielkema and Hielkema 2019: 127 (checklist, distribution).
Type locality. Nouveau Chantier, Saint-Laurent-du-Maroni, French Guiana.
Type material. Byrsopolis aenescens Ohaus, 1926: Lectotype male, dissected, here designated. (a) ‘ HOLOTYPUS / Byrsopolis / aenescens Ohaus 1926 /labelled by MHHUB 2010’ [red label], (b) ‘Oyapok Oberlf./Pied Saüt, III.1918 /’, (c) ‘ GUYANE FRANÇ SE/Nouveau Chantier/ COLLECTION LE MOULT’, (d) ‘Type’ [red label], (e) ‘ Byrsopolis /aenescens/Ohs’. [handwritten by Soula], (1♂ ZMHB) (Figure 16 (a-b, d)); Byrsopolis chassaini Soula, 2010a: Holotype male, dissected. (a) ‘ Holotype / Byrsopolis / chassaini S./2010 Soula’ [red label, handwritten by Soula], (b) ‘Mussé des Confluences/MHNL/47030019’, (c) ‘Cacao/Guyane Fç./M Soula det 19’ [handwritten by Soula], (1♂ CCECL, specimen examined through images) (Figure 16 (e–h)); (1♂).
Additional material. [15 specimens] (a) ‘ Guiana Francesa, Route de/St. George, Pk 125, 07./iii.2008, P.L. J.G./ Giúglaris Leg’ (1♂ CERPE) (Figure 16 (c)); ‘ FRENCH GUIANA: Saül, Point / de Vue, Belvédère de Saul-/ Montagne Pelée, Saül, Colline /en lisière forêt et bourg de/ Saül, N 3°37 ʹ 22 ’ W 53°12 ʹ 58” ’ // ‘ 09.iii.2017, PVB:/automatic light trap/(blue)’ // ‘ Byrsopolis aenescens / Ohaus, 1926 /det. M. Seidel 2021’ // ‘WORLD/SCARAB./ DATABASE/ WSD00347508’ (1♂ MSPC); same, except ‘ 19.iv.2017, PVB:/automatic light trap/(blue)’ // ‘WORLD/SCARAB./ DATABASE/WSD00347509’ (1♂ MSPC); same, except ‘ 23.iii.2017, PVB:/ automatic light trap/(blue)’ // ‘WORLD/SCARAB./ DATABASE/[WSD00347510- WSD00347512]’ (3♂ MSPC); same, except ‘ 17.iii.2017, PVB:/automatic light trap/(blue)’ // ‘WORLD/SCARAB./ DATABASE/WSD00347513]’ (1♂ MSPC); same, except ‘ 06.iv.2017, PVB:/ automatic light trap/(blue)’ // ‘WORLD/SCARAB./ DATABASE/[WSD00347517- WSD00347518]’ (2♂ MSPC); same, except ‘ 03.iii.2017, PVB:/automatic light trap/(blue)’ // ‘WORLD/SCARAB./ DATABASE/WSD00347519’ (1♂ MSPC); ‘ FRENCH GUIANA: Piton/ Rocheux de l’Armontabo, Saint/Georges, Savane-roche,/sommet de l’inselberg (353 m),/ N 3°43 ʹ 56,1 ’ W 52°19 ʹ 11,9” ’ // 11.ii.2018,/L.T: light trap’ // ‘ Byrsopolis aenescens / Ohaus 1926 /det. M. Seidel 2021’ // ‘WORLD/SCARAB./ DATABASE/WSD00347514’ (1♂ MSPC); same, except ‘ 16.ii.2018,/L.T: light trap’ // ‘WORLD/SCARAB./ DATABASE/WSD00347515’ (1♂ MSPC); same, except ‘ 16.ii.2018, PVP:/automatic light trap/(pink)’ // ‘WORLD/ SCARAB./ DATABASE/WSD00347516’ (1♂ MSPC). No collection data.
Diagnosis. Body testacious-brown to reddish-brown, without metallic green reflections; clypeus subrectangular; antennal club about 1.97x longer than antennomeres II–VII combined; scutellar plate subtriangular, base weakly rounded; elytral apex with divergent angles; elytra with indistinct striae, humeri moderately punctate; protibial spur about 3.5x longer than wide; parameres symmetrical, weakly divergent; sides of parameres almost linear, basal margin with strong small emarginations.
Description. Male. Body. Oval, elongate; testaceous-brown to reddish-brown, only elytra and antennomeres testaceous-brown to dark orange (Figures 16 (a), 17(a–c)), frontoclypeal suture black; reddish-brown setae on scutellar shield; without metallic green reflections. Lectotype. 27.00 mm. Elytral width 15.50 mm. Head. Clypeus about 2x wider than long; semioval; weakly concave only at marginal areas; frontoclypeal suture with weak curvilinear extremities; punctures small to moderate, moderately to densely punctate; frons about 1.50x longer than clypeus; punctures small to large, moderately punctate on base, densely punctate on apex; glabrous; mandibles with moderately rounded external border, scissorial region weakly rounded, with few and sparse setae on disc, base of scissorial region with short and dense setae, small, tooth-like projection on mesal internal border (Figure 17 (e)); galea with four teeth, one long apical tooth, two median small toothlets, and one small basal tooth with a single seta (Figure 17 (f)); apex of prementum moderately emarginate, with triangular lobes; last labial palpomere about 2.87x longer than palpomere II (Figure 17 (g)); labrum weakly emarginate, moderately setose (Figure 17 (h)); antennomere III subcylindrical, antennomeres IV–V subquadrate, antennomeres VI– VII subconical; antennal club about 1.97x longer than antennomeres II–VII combined. Thorax. Pronotum transverse, about 1.67x wider than long (Figures 16 (a), 1616(a)); punctures small to moderate, moderately punctate at disc, densely punctate at marginal areas; one transverse line at apex formed by a small concavity on each side near anterior marginal areas; scutellar plate subtriangular, base weakly rounded (Figure 17 (a)); small setae on apex, moderately distributed; punctures small to moderate, sparsely punctate at apex, moderately punctate at disc and base. Elytra. About 1.15x longer than wide; punctures small to moderately large, moderately punctate at disc and marginal areas; interstriae indistinct (Figure 17 (a)); elytral apex with divergent angles; humeri with microsetae in moderate punctures, sparsely distributed. Legs. Protibial spur about 3.5x longer than wide; mesotibiae with one carina and metatibiae with two carinae. Aedeagus. Parameres apex rounded, weakly sinuous, moderately divergent, symmetrical; acute angle between parameres; parameres wide (Figures 16 (b-c), 17(d)); lateral margins without excavation or carina; proximal margin with strong small emarginations; longitudinal midline concave at apex; glabrous.
Female. Unkown.
Variation. Length 23.10–28 mm. Humeral width 10.50–13.50 mm. Elytral width 13.15– 17.00 mm.
Etymology. The specific epithet in latin is ‘aenescens’, which means bronze-coloured.
Distribution. Byrsopolis aenescens can be found only in French Guiana in the cities of Saint-Laurent-du-Maroni, Cacao, Saül, Saint-Georges.
Remarks. Byrsopolis aenescens differ from B. ferrandi in the following: apex of prementum with moderate emargination (strong emargination); labrum weakly emarginated (moderately emarginated); protibial spur 3.5x longer than wide (2.80x longer); mesotibia with one carina (two carinae); elytral apex with divergent angles (right angles).
description: Published as part of Medeiros, Rone A. F., Seidel, Matthias & Grossi, Paschoal C., 2022, Revision of the genus Byrsopolis Burmeister, 1844 (Coleoptera: Melolonthidae: Rutelinae: Rutelini), with the description of six new species endemic to Brazil and Paraguay, pp. 1315-1364 in Journal of Natural History (J. Nat. Hist.) (J. Nat. Hist.) 56 (29 - 32) on pages 1351-1354, DOI: 10.1080/00222933.2022.2115950, http://zenodo.org/record/7156474