Byrsopolis ohausi Medeiros, Seidel and Grossi, 2022

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, Journal of Natural History (J. Nat. Hist.) 56 (29 - 32), pp. 1315-1364 : 1346-1348

Byrsopolis ohausi Medeiros, Seidel and Grossi , sp. nov. ( Figure 14 (a–f))

Holotype. Male, dissected, labelled. (a) ‘ Byrsopolis Grão Mogol / Brasil. Minas Gerais, Grão / Mogol , 16.i.2004, J. De Nadai /& N. dos Anjos legs’ (1♂ CERPE).

Paratype. Male , dissected, labelled. (a) ‘ Grão Mogol-MG – Brasil / 15 .xii .2002/N. Anjos col’, (b) ‘ B . laticollis?/ Burmeister, 1855 /P . Grossi det . 2015’ [handwritten] (1♂ CERPE) .

Diagnosis. Body yellowish-brown to reddish-brown, with metallic green reflections; clypeus parabolic; antennal club about 1.5 longer than antennomeres II–VII combined; scutellar plate subtriangular, with broadly rounded basis; elytral posterior margins with divergent angles; elytra strongly striate and humeri moderately punctate; protibial spur about 4.2x longer than wide; parameres symmetrical, weakly divergent; basal margin bilobed.

Description of holotype. Body. Oval, elongate; yellowish-brown to reddish-brown ( Figure 14 (a)), with metallic green reflections; frontoclypeal suture dark reddish-brown to black; yellow, orange or reddish-brown setae on scutellar plate. Length 23.10 mm. Humeral width 12.60 mm. Elytral width 13.15 mm. Head. Clypeus about 1.75x wider than long; parabolic; weakly concave only at marginal area; frontoclypeal suture with curvilinear extremities moderately rounded and almost straight laterally, with obtuse angles; punctures small to moderate in size, moderately to densely punctate; frons about 1.80x longer than clypeus; weak concavity on disc; punctures small to moderately large, moderately to densely punctate; glabrous; mandibles with moderately rounded external border, scissorial region weakly rounded, with two setae, one near apex and one near intern border ( Figure 14 (c)); galea with four teeth, one long apical tooth, one median tooth, and one basal tooth with three small toothlets, each with a single seta, anterior tooth with two setae ( Figure 14 (d)); last maxillary palpomere with large, elliptic sensorial area, not exceeding middle of palpomere; apex of prementum moderately emarginate; last labial palpomere about 2.4x longer than palpomere II ( Figure 14 (e)); labrum weakly emarginate, moderately setose ( Figure 14 (f)); antennomere III subcylindrical, antennomeres IV–V subquadrate, antennomeres VI–VII subconical; antennal club about 1.5x longer than antennomeres II–VII combined. Thorax. Pronotum transverse, about 1.70x wider than long ( Figure 14 (a)); punctures small to moderate, moderately to densely punctate; humeri with small setae sparsely distributed; one transverse line formed by a concavity on each side near marginal areas; scutellar plate subtriangular, base broadly rounded ( Figure 14 (a)); small setae on the apex, sparsely to moderately distributed; punctures small to moderately large, plate sparsely punctate at base, moderately punctate at apex. Elytra. About 1.10x longer than wide; strongly striate; punctures small to large, moderately to densely punctate; interstriae with strong coalescent punctures ( Figure 14 (a)); elytral apex with divergent angles; humeri with small setae in moderate punctures. Legs. Protibial spur about 4.2x longer than wide; mesotibiae and metatibiae with one carina. Aedeagus. Parameres rounded, weakly sinuous, weakly divergent, asymmetrical, acute angle between parameres; parameres wide and flattened ( Figure 14 (b)); lateral margins moderately excavated, longer on left paramere, forming a carina; proximal margin sinuated; longitudinal midline concave; glabrous.

Female. Unkown.

Variation. Length 24.10 mm. Humeral width 13.50 mm. Elytral width 15.00 mm.

Etymology. The specific epithet is a atribute to the great German entomologist Friedrich Ohaus (1864–1946), also called the ‘Father of Rutelinae’, who established the modern systematics of Rutelinae that is still largely in use today.

Distribution. This species is only found in the ‘Serra do Espinhaço’, north of Minas Gerais, in the Grão Mogol city ( Figure 19 ).

Remarks. This species is very similar to Byrsopolis laticollis and B. blanchardi sp. nov., but differs from these two by the characters of the clypeus being 1.75x wider than long, elytral apexes divergent, aedeagus with longitudinal midline formed by a concavity, and wide, flat parameres. Byrsopolis laticollis have clypeus 2.1x wider than long; elytral apexes with acute angles;aedeagus with rounded and thick parameres. Byrsopolis blanchardi sp. nov. have clypeus 2.2x wider than long; elytral apexes truncate; aedeagus with rounded and thin parameres.

Figures

Figure 14. Byrsopolis ohausi sp. nov. Dorsal habitus (a); caudal view of aedeagus (b); dorsal view of left mandible (c); ventral view of left maxilla (d); ventral view of mentum (e); and dorsal view of labrum (f). Scale bars: a = 5 mm; b–f = 1 mm.

Figure 19. Distribution map of Byrsopolis species.