Dichotomius (Luederwaldtinia) rafanunezi, Montoya-Molina & Vaz-De, 2021

Montoya-Molina, Santiago & Vaz-De, Fernando Z., 2021, Taxonomic review of the Dichotomius (Luederwaldtinia) agenor species group (Coleoptera: Scarabaeidae: Scarabaeinae), European Journal of Taxonomy 734, pp. 1-64 : 36-39

Dichotomius (Luederwaldtinia) rafanunezi sp. nov.

urn:lsid:zoobank.org:act:B221850A-C3E2-4AEF-A134-5CE0DB02DD3F

Fig. 12 , Map 7

Diagnosis

Dichotomius rafanunezi sp. nov. is separated from other species in the group by the following combination of characters: dorsal and ventral surface shiny green to dark green. Anterior edge of pronotum displaying sharp declivity, antero-medial edge lacking well-developed lobes as D. fornicatus . Cephalic carina twice as wide as high, median and lateral tubercles narrow. Metasternum anterior edge surface rugose. D. rafanunezi sp. nov. also differs from D. fornicatus by shape of male genitalia (aedeagus and internal sac of aedeagus).

Etymology

Dichotomius rafanunezi sp. nov. is named after Rafael V. Nunez, a great scientist and friend who contributes to the study on Scarabaeinae and the genus Dichotomius .

Material examined

Holotype BRAZIL • ♂; Cuiabá, Fazenda Santhidi , Mato Grosso; 250 m a.s.l.; 15º23′06″ S, 56º06′42″ W; pitfall faeces; 8–11 Nov. 2008; L.R. Silva leg. [white, p]; CEMT.

Paratypes

BRAZIL – Mato Grosso • 1 ♀; Cuiabá ; 183 m a.s.l.; 15º35′21″ S, 56º01′46″ W; light; Sep. 2015; R.V. Nunes and B.F. Becker; CEMT • 8 ♂♂, 8 ♀♀; Cuiabá, Fazenda Santhidi ; 250 m a.s.l.; 15º23′06″ S, 56º06′42″ W; pitfall faeces; 8–11 Nov. 2008; L.R. Silva leg.; CEMT • 1 ♂, 2 ♀♀; Pitfall baço de boi; 5 Oct. 2008; L.R. Silva leg.; CEMT • 1 ♂, 1 ♀; Cuiabá. Faz Santhidi ; fruit trap; 30 Nov. 2008. L.R. Silva leg.; CEMT • 2 ♂♂; Cuiabá Faz. Santhidi ; 15º23′06″ S, 56º06′53″ W; human faeces; Oct. 2008; L.R. Silva leg.; CEMT • 1 ♂, 1 ♀; Cuiabá Faz. Santhidi ; light; 4 Oct. 2008; L.R. Silva leg.; CEMT • 1 ♀; Cuiabá Faz. Santhidi ; manual; 31 Oct. 2012; L.R. Silva leg.; CEMT • 1 ♂; Cuiabá Faz. Santhidi ; 15º23′06″ S, 56º06′53″ W; FIT [flight interception trap]; 5–26 Oct. 2008; L.R. Silva leg.; CEMT • 1 ♀; Cuiabá Faz. Santhidi ; 15º23′06″ S, 56º06′42″ W; 250 m a.s.l.; light; 28 Sep. 2008; L.R. Silva leg.; CEMT • 1 ♂; 3 Nov. 2008; L.R. Silva leg.; CEMT • 1 ♂; Fazenda Santhidi ; pitfall human faeces; 3–11 Nov. 2008; R.F. Oliveira and L.R. Silva leg.; CEMT • 1 ♂; Chapada dos Guimarães ; manual; 7 Nov. 2011 spec.; Z. Hubner leg.; CEMT • 5 ♂♂; Diamantino Vale da Solidão ; 14º22′14″ S, 56º07′59″ W; luminosa; 20 Oct. 2008; E. Furtado Casa leg.; CEMT • 2 ♂♂; 21 Oct. 2008; E. Furtado Casa leg.; CEMT • 1 ♂, 2 ♀♀; 24 Oct. 2008; E. Furtado Casaleg.; CEMT • 8 ♂♂, 4 ♀♀; 450 m a.s.l.; 14º22′ S, 56º07′ W; Oct. 2012; E. Furtado leg.; CEMT • 1 ♂; Alto Rio Arinos ; Oct. 2001; E. Furtado leg.; CEMT • 1 ♂; Rosário Oeste Fazenda Cocal ; manual; 19 Nov. 2012; S.E. Silva leg.; CEMT • 1 ♀; Poconé ; manual; 17 Nov. 2011; S. Vianna leg.; CEMT .

Description

Male

MEASUREMENTS. Length: 13.61 mm. Dorsal and ventral surface shiny green to dark green.

HEAD. Anterior surface rugose, extending posteriorly to middle third not reaching base of cephalic carina ( Fig. 12A, C ). Cephalic carina narrow, twice as wide as high and vertically broadened, anterior surface with small fine punctures. Median tubercle twice as high as lateral tubercles, conical in shape and slightly curved posteriorly; lateral tubercles obtuse apically. Ventral clypeal process obtuse.

PRONOTUM. Wider than long. Pronotal disc shiny covered by dense deep punctures, separated by width of a puncture. Anteromedial edge with distinct declivity, antero-lateral margins rugose ( Fig. 12A ). Hypomeron medial disc smooth and shiny. Lateral edge margin bearing single row of setae, all approximately of same length.

ABDOMEN. Prosternum and mesosternum surface shagreened, bearing round ocellate punctures of same size as on hypomera, punctures separated by width of a puncture ( Fig. 12D ). Metasternum antero-median portion next to mesocoxa rugose ( Fig. 12H ), with ocellate punctures along lateral areas separated by diameter of a puncture. Small ocellate punctures surrounding margins of mesocoxa. Ocellate punctures along antero-lateral margins sternites, larger on lateral edges. Sixth abdominal sternite and apex of the pygidium lower or depressed than other sternites. Pygidium delimited by margin that widens towards apex, surface covered by well-impressed punctures and basal margin bearing few scattered punctures that merges together.

ELYTRA. Opaque, wider than long. Interstriae microsculpture shagreened, fine shining punctures arranged randomly. Striae black, punctures weakly impressed but clearly defined, separated by twice diameter of a puncture on elytral disc ( Fig. 12A ).

LEGS. Metacoxa posterior edge bearing row of disorganized small, ocellate glabrous punctures, separated by width of a puncture. Setigerous punctures next to insertion of trochanter large, approximately twice width of smaller punctures.

PARAMERES AND LAMELLA COPULATRIX. As in Fig. 12 E–G.

Morphological variation

Females ( Fig. 12B )

As males except for the following characters:

HEAD. Surface completely rugose, denser at anterior portion. Cephalic carina trituberculate, median tubercle higher than lateral and medially emarginate. Lateral tubercles narrow.

PRONOTUM. Weak medial depression on anterior edge, surface covered by well-impressed punctures, separated by width of a puncture. Median sulcus conspicuous.

Remarks

This species occurs from Mato Grosso, central west Brazil, and is closely related to D. fornicatus ( Luederwaldt, 1931) .

Figures

Fig. 12. Dichotomius rafanunezi sp. nov. A–B. Dorsal habitus.A. Holotype, ♂ (CEMT). B. ♀. C. Lateral view of the aedeagus. D. Frontal view of the head. E. Dorsal view of the aedeagus. F–G. Lamella copulatrix. H. Ventral view of the metasternum; antero-medial edge near the interior margin of the mesocoxa rugose.