Inca neglectus, Sousa & Seidel, 2021

Sousa, Rafael & Seidel, Matthias, 2021, Review of the Inca irroratus species group with description of two new species of Inca LePeletier & Serville, 1828 (Coleoptera, Scarabaeidae, Cetoniinae), European Journal of Taxonomy 748 (1), pp. 15-35 : 26-27

Inca neglectus sp. nov.

urn:lsid:zoobank.org:act:21C602CA-DB1D-41A4-8BCA-5A2DC0E227FD

Figs 1F–J, Q , 2E–H, N , 3B, E , 4B

Differential diagnosis

Inca neglectus sp. nov. is very similar to I. axeli sp. nov. in that both species have clypeal horns in males with dorsolateral tooth long and acute (short and rounded in I. irroratus ), posterior angles of pronotum acute (rounded in I. irroratus ), medial area of elytra with large waxy maculae (absent in I. irroratus ), and posterior tooth of protibia long and acute (short and rounded in I. irroratus ). Inca neglectus sp. nov. has the inner dorsal carina of clypeal horns gradually interrupted (abruptly interrupted at apex in I. axeli sp. nov.) and the outer distal process of parameres long and rounded (long and acuminate in I. axeli sp. nov. and short and rounded in I. irroratus ) (see Table 2 ).

Etymology

The species epithet comes from the Latin word ‘ neglectus ’ referring to the species being neglected taXonomically since Burmeister first described it, but did not name it, in 1847.

Material examined

Holotype BRAZIL – Rio de Janeiro • 1 ♂; “Bras. [Brasil], Nov. Frib. [Nova Friburgo], Bske [Bescke] leg., 54, irroratus Ch. Gor. & P, HOLOTYPE, Inca neglectus , sp. nov., det. Sousa & Seidel 2020”; MLUH.

Paratypes (6 ♂♂ and 4 ♀♀) BRAZIL – Espirito Santo • 1 ♂; “Brasil, Espirito Santo, EX col. Visc. Bonvouloir, Inca irroratus Chevr. (?), Burm., 1847 (not 1842), G.J.Arrow det., Brit. Mus. 1946-356”; BMNH . – Minas Gerais • 1 ♂; Ouro Preto ; 27 Dec. 1998; F. Ohaus leg.; MZSP . – Rio de Janeiro • 1 ♀; “Bras. [Brasil], Nov. Frib. [Nova Friburgo], Bske [Bescke] leg., irroratus Ch. Gor. & P.”; MLUH • 1 ♂, 1 ♀; “Bras. [Brasil], Bske [Bescke] leg., irroratus Ch. Gor. & P”; MLUH • 1 ♂; Nova Friburgo, Garrafão, Cascatinha , 23 Mar. 2003; UFRPE • 1 ♀; same locality as for preceding; 6 Apr. 2002; UFRPE • 1 ♀; same locality as for preceding; Mar. 1999; R. Vassalo leg., “Coleção F. & P. Grossi”; UFRPE • 1 ♂; same locality as for preceding; 27 Mar. 2004; R. Vassalo leg.; UFRPE • 1 ♂; Petropolis ; “21.7.947 [21 Jul. 1947], Luiz P. Leite, Coll. IRSNB, Inca besckei Schaum ; ex coll J. ROUCH, I.G.: 32.703”; RBINS .

Paratypes are labelled with “ PARATYPE; Inca neglectus ; sp. nov.; det. Sousa & Seidel, 2020”.

Description

Holotype (male)

BODY ( Fig. 1I–H [=images of almost identical paratype]). Total length including clypeal horns 42.0 mm; width across humeri 17.0 mm.

COLOUR. Reddish brown with dark green heterogeneous spots, dorsal surface with weak green and orange metallic reflections; legs and meso- and metathoraX with reddish brown bright colour ( Fig. 1F– H, Q ).

HEAD. Surface of frons with dark green and dark reddish-brown waxy secretion; clypeal horns with anterior area of inner dorsal carina gradually interrupted at apex; dorsolateral tooth long and acute ( Fig. 1Q ).

THORAX. Lateral margin of pronotum strongly sinuous; lateromedial area with elongated and irregular fovea; longitudinal groove well marked; posterior angles acute ( Fig. 1I–H ). Anterior prosternal process acute, projected and densely setose in the median area; can be acute or rounded and little or strongly projected. Anterolateral area of scutellar plate punctate. Elytra little maculated with light yellow waxy maculae covering all surface ( Fig. 1F ).

LEGS. Posterior tooth of protibia long and acute ( Fig. 3B ). Mesempodium with 2 setae.

ABDOMEN. Fovea of sternite VII strongly marked. Disc of pygidium densely punctate, lateral area with well-defined punctures.

TERMINALIA. Aedeagus: outer distal process of parameres long and rounded ( Fig. 1I–J ).

MORPHOLOGICAL VARIATIONS (males). Body length 33−42 mm, width 14−17 mm. Head. In brachycerous specimens the dorsolateral tooth can be rounded and reduced in size.

Female

BODY ( Fig. 2E–G ). Length 40–42 mm; width across humeri 16–18 mm. Colour of waxy secretion of elytra surface varies from reddish brown to dark reddish brown with waxy maculae that can vary from light yellow to gold yellow colour.

Type locality

Nova Friburgo, Rio de Janeiro State, Brazil.

Distribution

Brazil: Espírito Santo, Minas Gerais (Ouro Preto) and Rio de Janeiro (Nova Friburgo) states ( Fig. 5 ).

Remarks

Burmeister (1847) described and diagnosed this species under I. irroratus . After careful examination of morphological evidence we conclude that the real I. irroratus is actually what Burmeister identified as his new species I. burmeisteri , leaving this species unnamed. The specimens listed in ‘additional material’ under I. burmeisteri in Seidel et al. (2018) belong to I. neglectus sp. nov.

Figures

Fig. 1. Males of Inca spp. A–E, P. Inca axeli sp. nov., holotype (MZSP 22036). – F–J, Q. Inca neglectus sp. nov., paratype (MZSP). – K–O, R. Inca irroratus Chevrolat, 1833, neotype (BMNH). A, F, K. Dorsal habitus. B, G, L. Ventral habitus. C, H, M. Lateral habitus. D, I, N. Dorsal view of aedeagus. E, J, O. Lateral view of aedeagus. P–R. Dorsal view of head. Scale bars = 5 mm.

Fig. 2. Females of Inca spp. and type labels. A–D, M. Inca axeli sp. nov. – E–H, N. Inca neglectus sp. nov. –I–L, O. Inca irroratus Chevrolat, 1833. A, E, I. Dorsal habitus. B, F, J. Ventral habitus. C, G, K. Lateral habitus. D, H, L. Type labels. M–O. Frontal view of head. Scale bars = 5 mm.

Fig. 3. Morphological details of Inca spp. A, D, G–N. I. axeli sp. nov. (A, D: ♀, G–N ♂). – B, E. I. neglectus sp. nov. – C, F. I. irroratus Chevrolat, 1833. A–C. Protibia, lateral view. D–F. Details of elytral epipleuron. G–N. Mouthparts. G–I. Right mandibles (dorsal, inner and ventral view). J–K. Labrum (dorsal and frontal view). L. Right maxilla (dorsal view). M. Epipharynx. N. Labium.

Fig. 4. Images of liveInca spp.A. Inca axelisp. nov. (photo by R. Barros and R. Koike).B. Inca neglectus sp. nov. (photo by N. Marchito). C. Inca clathratus sommeri Westwood, 1844 (photo by A. González Gallina). D. Inca clathratus clathratus (Olivier, 1792) (photo by R. Barros and R. Koike). E. Inca clathratus quesneli Boos & Ratcliffe, 1985 (photo by M. Hulme). F. Inca pulverulentus (Olivier, 1789) mating (photo by R. Barros and R. Koike). G. Inca bonplandi (Gyllenhal, 1817) (photo by J. Touroult). H. Inca besckii Burmeister & Schaum, 1840 feeding on tree sap (photo by N. Wisnik).

Fig. 5. Distribution map of species of the Inca irroratus group.