Ovomanonychus rosettae ( Frey, 1976 ) Costa & Cherman & Iannuzzi, 2020

Costa, Fábio Correia, Cherman, Mariana Alejandra & Iannuzzi, Luciana, 2020, Ovomanonychus, a new genus of South American Sericoidini (Coleoptera Scarabaeidae: Melolonthinae), Zootaxa 4759 (1), pp. 65-76 : 70-72

Ovomanonychus rosettae ( Frey, 1976) , new combination

Figures 4 A–G.

Manonychus rosettae Frey, 1976: 377 ; Evans 2003: 303 (checklist); Evans & Smith 2005: 256 (checklist); Evans & Smith 2009: 309 (checklist); Grossi and Vaz-de-Mello 2020 (checklist-online).

Type material. Ovomanonychus rosettae holotype male BRAZIL: “Encruzilhada / 960m, Bahia / Alvarenga, XI. 72”, “Type / Manonychus / rosettae / G. Frey 1975”. ( NHMB) . Paratypes. Brazil. Bahia. Encruzilhada , xi. 1972, 960 m, Alvarenga: 1 female ( NHMB) .

Non-type material. BRAZIL. Minas Gerais. Águas Vermelhas , 13.xii. 2007, 840 m, light trap, 15°42’27’’S 41°32’02’’W, Grossi, Rafael, and Parizotto: 1 male ( CERPE) ; Espírito Santo. Linhares, Reserva Natural Vale , 13.xi.2012, Martins and Fiuza: 1 male ( CEMT) ; Linhares, Sooretama , xi.1962, A. Martínez: 1 male ( CMNC) ; Conceição da Barra , x.1972, M. Alvarenga: 1 male ( CMNC) .

Type locality. BRAZIL, Bahia, Encruzilhada , 960 m.

Diagnosis. Clypeus trapezoidal, with anterior margin truncate; large eyes; pronotal anterior and posterior angles rounded; scutellum smooth; elytra with four longitudinal costae; protibia strongly sculptured; metacoxae with sparse bristles; metatibial spurs in different size; in males parameres wide, deflected distally and punctate, flatted laterally; phallobase in dorsal view, distal margin constriction.

Redescription. Holotype. Male: Length 11.2 mm; width 4.8 mm (variation 11.0– 11.4 mm; 4.6–4.8 mm). Head: Shiny, light reddish brown; distance between eyes twice the width of one eye; frons longer than clypeus; clypeus trapezoidal; labrum, in frontal view, with width one third greater than the width of the clypeus; mandibles with mola multigrooved; distal maxillary palpomere with maximum width equal to apex width; galea with seven teeth visible in frontal view; labium with apex wider than the base; labial anterior margin from rounded to strongly sinuate. Prothorax: Pronotal anterior and posterior angles rounded. Pterothorax: Scutellum smooth; mesosternum with short bristles; metasternum with long and dense bristles on disc. Elytra: Four longitudinal costae; elytral suture strongly elevated, and distal portion darker than the elytra; coarse punctures, fading towards lateral and apical margin. Legs: Protibia strongly sculptured along the toothed margin; protarsomere I length subequal to protarsomere II; mesotarsomeres with proximal portion smooth; metacoxae with sparse bristles; metatibial spurs in different size. Abdomen: Ventrites with inconspicuous punctures; ventrite II–V subequal in length; propygidium glabrous, with coarse punctures; pygidium wider than it is long, with coarse and dense punctures and basal region depressed laterally; basal width of the pygidium equal to the posterior width of the propygidium. Male genitalia: Parameres wide, deflected distally and punctate; inner margin strongly curved on distal portion; flatted laterally; phallobase in dorsal view, distal margin constriction.

Sexual dimorphism. Female with metasternal bristles sparser than male. Females longer than males (12.0 mm; 4.6 mm).

Geographical distribution. Brazil (Bahia, Minas Gerais, and Espírito Santo) .

Remarks. Ovomanonychus rosettae differs to Ovomanonychus striatus new species in the large eyes (small eyes); mola multigrooved (mola with carinae slightly impressed); scutellum smooth (scutellum with fine and dense punctures); metacoxae with sparse bristles (metacoxae with dense bristles); and parameres wide and deflected distally (parameres narrow and non-deflected distally). Ovomanonychus rosettae differs to O. inajae new species in the clypeus trapezoidal and frons longer than clypeus (clypeus is broadly rounded and the frons as long as the clypeus); scutellum smooth (scutellum punctate); pygidium wider than it is long and with coarsely marked punctures (pygidium as wide as it is long and with finely marked punctures); lateral of parameres without excavation (lateral of parameres with strong excavation).

Up to now, O. rosettae was only known from the type locality, Encruzilhada, Bahia, at 960 m. With this study, the records were expanded north to Minas Gerais (840 m) and Linhares, Espírito Santo.

Figures

FIGURE 4. Ovomanonychus rosettae (Frey, 1974) new combination, male holotype. A, Dorsal habitus; B, lateral view; C, frontal view; D, diagonal view; E, parameres dorsal and lateral view; F, labels.