Byrsopolis angeloottatii 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 : 1337-1339

Byrsopolis angeloottatii Medeiros, Seidel and Grossi sp. nov. ( Figure 10 (a–g))

Holotype. Male, dissected, labelled. (a) ‘ Brasil, Mato Grosso do Sul,/ Três Lagoas, Três Lagoas /Agroflorestal Ltda. Horto Rio/ Verde parte A – Lageado /ethanol-baited FIT cerradão/fragment, 26.x.1993,/ 20°55 ʹ 31.94’S 52° 8 ʹ 15.14” W/ Flechtmann, C.A.H. leg.’ ( CERPE).

Paratypes [4 specimens]

Males, not dissected. Three males with same data as holotype ( CERPE, CEMT, MZSP); one male labelled, ‘ Brasil, Mato Grosso do Sul,/ Selvíria, UNESP Farm –/ Bovinocultura , 10. v.1991,/ 20°22 ʹ 36.13’S / 51°24 ʹ 58.92”W hand/collected Perozim , C.R. leg.’ ( MEFEIS).

Diagnosis. Clypeus, frons and elytra reddish-brown; antennae, pronotum, scutellar plate, venter and legs dark orange, without metallic green reflections; clypeus subrectangular, weakly bilobed, moderately concave; antennal club about 2.60x longer than antennomeres II–VII combined; scutellar plate subtriangular, with sides and basis rounded; elytral apex with right angles; elytra without striae, punctate, humeri weakly punctate; protibial spur about 2.60x longer than wide; parameres symmetrical, parallel, weakly angled internally, basal margin bisinuate.

Description of holotype. Body. Shape elongate oval; without metallic green reflections; colour reddish-brown to brown-testaceous on clypeus, frons and elytra; pronotum and scutellar plate lighter than other body areas, yellowish-brown to orange-dark ( Figure 10 (a, b)); frontoclypeal suture black on sides and reddish in middle; marginal areas of clypeus black on apex and reddish-brown on base; clypeus with orange setae; antenna yellow to orange; scutellar plate dark with marginal areas; dark brown. Length 19.90 mm. Humeral width 10.00 mm. Elytral width 11.25 mm.

Head. Clypeus about 1.80x wider than long, subrectangular, weakly bilobed, sides almost straight ( Figure 10 (a)), angles and basis rounded, anterior margin straight; anterior area of clypeus moderately concave, apex elevated; frontoclypeal suture bisinuate, with weakly V-shaped sinuosity at middle, sides rounded; frons with punctures small to moderately large, moderately to densely punctate; moderate to large setae, moderately to densely distributed; frons equal to clypeus in length; punctures small to moderately large, moderately to densely punctate, setae scattered near eyes, posterior region moderately punctate; moderately sized punctures setigerous; mandibles with rounded external border, with a small tooth at incisive region; maxillary galea with six teeth (apical region without teeth, two toothlets at middle, and three teethelets at base [toothlets without moderate setae]) ( Figure 10 (e)); last maxillary palpomere with elliptical sensorial area ( Figure 10 (e)); apex of prementum moderately emarginate ( Figure 10 (g)); last labial palpomere about 2x longer than palpomere II ( Figure 10 (g)); labrum weakly emarginated at middle of apex ( Figure 10 (g)); antennomere III subcylindrical, antennomere IV subquadrate, antennomeres V–VI subconical; antennal club about 2.60x longer than antennomeres II–VII combined ( Figure 10 (a)). Thorax. Pronotum transverse, about 1.50x wider than long ( Figure 10 (a)); punctures small to moderately large, moderately to densely punctate; microsetae in moderate punctures, sparsely to moderately distributed; marginal areas with sparse punctures; scutellar shield subtriangular, with sides and basis weakly rounded; surface covered with small to large setae; setae on apex sparsely to densely distributed; punctures small to moderately large, base sparsely and disc densely punctate. Elytra. About 1.10x longer than wide; punctures small to large, moderately to densely punctate ( Figure 10 (a,b)); microsetae in moderate punctures, sparsely to moderately distributed; indistinct striae, punctate; humeri weakly punctate; interstriae with moderately sized punctures. Legs. Protibial spur about 2.60x longer than wide; mesotibiae and metatibiae with two carinae. Aedeagus. Parameres symmetrical, parallel, elongated, separated by a Ushaped gap, rounded at apex, weakly obtuse on internal angles; lateral margins weakly excavated longitudinally; basis of parameres with a short carina; basal margin bisinuate ( Figure 10 (c)).

Female. Unknown.

Variation. Length 19.90–21.00 mm. Humeral width 10.00– 10.70 mm. Elytral width 11.25– 12.00 mm.

Etymology. The specific epithet is a atribute to Angelo Thadeu Ottati. He is currently a Federal Agricultural Auditor with MAPA (Ministério da Agricultura, Pecuária e Abastecimento). Angelo dedicated himself for years to sorting, cataloguing, pinning and recording specimens trapped in light and ethanol-baited flight traps at the company known then as Três Lagoas Agroflorestal (today Suzano Papel e Celulose), in Três Lagoas, state of Mato Grosso do Sul, Brazil. The type locality (Três Lagoas and Selvíria, Mato Grosso do Sul state) ( Figure 19 ) has a predominant Cerrado vegetation, but there are also Atlantic Forest strips alternating with Cerrado close to the Paraná River.

Remarks. All specimens are known only from the type locality. Byrsopolis angellottati sp. nov. resembles B. quadraticeps , but differs from this species by: the reddish colouration, clypeus more setose, premental apex moderately emarginate, labrum weakly emarginate; scutellar plate more rounded on sides; shorter protibial spur; metatibia with two carinae. Most specimens were collected with black light traps.

Figures

Figure 10. Byrsopolis angeloottatii sp. nov. Dorsal habitus (a) and lateral habitus (a–b); caudal view of aedeagus (c); dorsal view of right mandible (d); ventral view of right maxilla (e); ventral view of mentum (f); dorsal view of labrum (g). Scale bars: a, b = 5 mm; c–g = 1 mm.

Figure 19. Distribution map of Byrsopolis species.