Scarabaeidae Latreille, 1802

Ferreira, André, Vaz-de-Mello, Fernando & Bravo, Freddy, 2021, A new species of Pelidnota MacLeay (Coleoptera, Scarabaeidae, Rutelinae, Rutelini) from Southeast Brazil, Papéis Avulsos de Zoologia (Pap. Avulsos Zool., S. Paulo) 61, pp. 1-9 : 2-9

publication ID	https://doi.org/ 10.11606/1807-0205/2021.61.39
publication LSID	lsid:zoobank.org:pub:3F9C8496-2294-46A4-9618-1F363AFB9A02
persistent identifier	https://treatment.plazi.org/id/03B62005-FFB6-8D5F-49EB-FD49FE1895C8
treatment provided by	Carolina
scientific name	Scarabaeidae Latreille, 1802
status

Treatment

Family Scarabaeidae Latreille, 1802 View in CoL Subfamily Rutelinae MacLeay, 1819

Tribe Rutelini MacLeay, 1819

Subtribe Pelidnotina Burmeister, 1844

Genus Pelidnota MacLeay, 1819

Pelidnota silveiranetoi sp. nov.

( Figs. 1-5 View Figure 1 View Figure 2 View Figure 3 View Figure 4 View Figure 5 )

Type material: HOLOTYPE (♂ CEMT): First label [white, typeset]:“ BRAZIL: SÃo Paulo, / Iracemápolis, / 11.ix.2011 ”. Second label [red, handwritten]: “ Pelidnota silveiranetoi sp. nov. / Ferreira / Vaz-de-Mello & Bravo / HOLOTYPE ” . PARATYPE (♂ CERPE): First label [white, typeset]:“ BRAZIL: SÃo Paulo, / Iracemápolis, / 11.ix.2011 ”. Second label [yellow, handwritten]: “ Pelidnota silveiranetoi sp. nov. / Ferreira / Vaz-de-Mello & Bravo / PARATYPE ”. PARATYPE (♂ ESALQ / USP): First label [white, typeset]: “ BRAZIL: SÃo Paulo, / Iracemápolis, / 11.ix.2011 ”. Second label [yellow, handwritten]: “ Pelidnota silveiranetoi sp. nov. / Ferreira / Vaz-de-Mello & Bravo / PARATYPE ”.

Diagnosis: Body (dorsal and ventral) brown with metallic green reflections ( Figs. 1 View Figure 1 A-C). Elytra brown, without metallic green reflections; black spots absent on the humerus and on the side of the elytra ( Figs. 1A, C View Figure 1 ). Maxilla with galea bearing 3 teeth ( Fig. 2C View Figure 2 ). Labium, anterior part with surface excavated; proximal margin straight; posterior part with lateral margin rounded ( Fig. 2D View Figure 2 ). Parameres (in dorsal view) with distal margin concave, gradually acute and slightly divergent on the apex; lateral margin straight, and slightly sinuous at middle; proximal margin slightly corrugated ( Figs. 5B View Figure 5 , 6A View Figure 6 ).

Description (holotype, male): ( Figs. 1 View Figure 1 A-C). Total length 24.07 mm, width 11.7 mm. Body elongated-oval ( Figs. 1 View Figure 1 A-B), convex in lateral view ( Fig. 1C View Figure 1 ). Color: Head, pronotum, scutellum, elytral suture and ventrally brown with metallic green reflections when exposed to fluorescent light; elytra brown without reflections, black spots absent on the humerus and on the side of elytra ( Figs.1 View Figure 1 A-B). Head: Antenna with antennal club elongated, longer than flagellomeres 1-5 combined. Clypeus trapezoidal in dorsal view, anterior margin straight, surface densely punctate. Fronto-clypeal suture not evident, pair of fronto-clypeal impressions present. Frons with surface moderately punctate; interocular distance 3.5× wider than eye diameter; inner margin of eyes with decumbent setae; ocular canthus length equal to half length of outer margin of eye ( Fig. 3A View Figure 3 ). Labrum transversely elongated and not fused to clypeus, surface with medial concavity, with sparse setae ( Fig. 2A View Figure 2 ). Mandibles not covered by anterior margin of clypeus, outer margin with 2 teeth, inner tooth 2× larger than external tooth, scissorial region with 2 teeth ( Fig. 2B View Figure 2 ). Maxilla with galea bearing 3 teeth subequals; palpomere IV fusiform and elongated, shorter than palpomeres I-III combined ( Fig. 2C View Figure 2 ). Labium, distal margin concave in medial portion; anterior part of disc with depressed concavity on surface; labial palp inserted on lateral surface, palpomere III fusiform and elongated, shorter than palpomeres I-II combined; posterior part of disc with elongated sparse setae on surface; proximal margin straight; lateral margin rounded with dense setae; surface with concavity longitudinal medially ( Fig. 2D View Figure 2 ). Pronotum: Convex; total length 5.7 mm, width at anteri- or angles 6.6 mm, width at medial region 10.5 mm, width at posterior angles 10.6 mm; dorsal surface densely punctate, punctures small; proximal margin slightly convex in medial portion,sparse decumbent setae in lateral portion; sides regularly rounded, converging toward anterior angles;posterior margin convex in medial portion;posterior angles straight ( Fig. 3A View Figure 3 ). Scutellum: Total length 1.4 mm, width 2.2 mm; surface moderately punctate without setae; anterior margin straight, posterior margin rounded. Elytra: Total length 15.9 mm; width from base of elitral suture to humerus 5.8 mm; surface without setae, sparsely punctate, punctures larger in size,irregularly organized in the first interval; elytral suture narrowing at apex; elytral apex conjointly truncated ( Figs. 4 View Figure 4 A-B); pleural membrane expanded laterally from base to medial portion of elytra. Venter: surface with dense setae on mesoventrite and metaventrite, sparse setae on abdomen; surface moderately punctate on head and thorax, sparsely to moderately punctate on abdomen; prosternum elongated tubercle-shaped not extending beyond procoxa; mesoventrite with anterior process elongated, extending slightly beyond mesocoxa. Legs: surface moderately punctate on femur and tibia of all legs, with deep and irregular punctate on mesotibia and metatibia. Protibia with 3 external teeth, distal tooth positioned obliquely in relation to longitudinal axis of tibia, larger than medial tooth, proximal tooth 0.5× medial tooth; inner subapical spur present; dorsal surface irregularly punctate with a medial longitudinal carinae with sparse setae ( Fig. 3B View Figure 3 ); tubercle present on apex of inner protarsal claw ( Fig. 3C View Figure 3 ); metacoxa with posterior projection rounded and projecting beyond distal margin of metatrocanter. Metafemur with surface moderately punctate and sparse elongated setae; mesotibia with sparse elongated setae on inner surface and with sparse spine-like setae on outer surface; surface and insertion area of spine-like setae deeply sculptured. Metatibia enlarged continuously from medial to apical region; surface and insertion area of spine-like setae sculptured as in mesotibia; surface with two trans- versal carinae with 5 and 7 spine-like setae respectively; apical margin sinuous, with two spurs in different sizes ( Fig. 5A View Figure 5 ). Tarsomere V elongated on all legs, with ventral margin laterally enlarged; protarsomere I elongated, as long as protarsomeres I-IV; mesotarsomeres and metatarsomeres II-IV with two spine-like setae on ventral surface. Abdomen: abdominal ventrites convex, sparse setae; surface sparsely to moderately punctate; ventrite V as long as ventrites III-IV; ventrite VI with concave distal margin. Pygidium: Slightly convex ( Fig. 1C View Figure 1 ); with irregular transversal dense striae; sparse decumbent setae on base of disc. Parameres: Symmetrical, fused; length 0.5× base and phallobase combined; distal margin concave, gradually acute and slightly divergent on apex; lateral margin straight (dorsal view), lateral margin slightly sinuous at middle; proximal margin slightly corrugated ( Figs. 5 View Figure 5 B-D).

Female: Unknown.

Morphological variation: The body length varies from 24.0 mm (Paratype) to 24.07 mm (Holotype). Clypeus of the paratypes with the surface slightly more densely punctate, lateral and anterior margins slightly straighter than in the Holotype.

Etymology: This species is named in honor of Dr. Sinval Silveira-Neto (Museu de Entomologia, Departamento de Entomologia, Fitopatologia e Zoologia Agrícola, Campus Luiz de Queiroz – ESALQ/Universidade de SÃo Paulo), who provided the specimens for study.

Distribution: The new species is known only from the type locality (Iracemápolis, SÃo Paulo state) ( Fig. 7 View Figure 7 ).

Remarks: Pelidnota silveiranetoi sp. nov. is morphologically similar to Pelidnota chalcothorax Perty, 1830 , mainly considering the color of the elytra. However, in Pelidnota silveiranetoi sp. nov., the body (dorsal and ventral) is brown with metallic green reflections; elytra with metallic green reflections only on the elytral suture; and black spots absent on the humerus and the side of the elytra. On the other hand, P. chalcothorax has a dark brown body (dorsal and ventral) with the head, pronotum, scutellum, pygidium, and legs darker than the elytra, without metallic green reflections; elytra with green reflections completely absent, but with black spots on the humerus and side of the elytra. Moreover, in Pelidnota silveiranetoi sp. nov., the parameres have concave distal margins gradually acute and slightly divergent on the apex; straight lateral margins slight- ly sinuous at the middle; slightly corrugated proximal margins ( Fig. 6A View Figure 6 ). In P. chalcothorax , the parameres have slightly concave distal margins, rounded lateral apex; semi-straight lateral margins; convex proximal margin ( Fig. 6B View Figure 6 ).

The geographic distribution of Pelidnota silveiranetoi sp. nov. has so far been restricted to the aforementioned type locality, while P. calchothorax has been recorded in Brazil with type locality SÃo Paulo ( Perty, 1830: 48) and Bahia, Espírito Santo, Minas Gerais, Rio de Janeiro, SÃo Paulo, and Mato Grosso ( Soula, 2009; Moore et al., 2017; Ferreira et al., 2018).