Canthidium (Neocanthidium) stofeli, Carvalho De Santana & Pacheco & Vaz-De, 2019

Carvalho De Santana, Edrielly C., Pacheco, Thaynara L. & Vaz-De, Fernando Z., 2019, Taxonomic revision of the Canthidium Erichson, 1847 species of the gigas group (Coleoptera, Scarabaeidae, Scarabaeinae), European Journal of Taxonomy 530, pp. 1-24 : 13-15

Canthidium (Neocanthidium) stofeli sp. nov.

urn:lsid:zoobank.org:act:1A3F5B17-8091-4ACC-B7DE-4311ADA3400D

Figs 7 , 9

Diagnosis

Canthidium stofeli sp. nov. differs from the other species in the group by having two anterior medial projections, one on each side of the pronotum.

Etymology

Named after Roberto Stofel, for the field support during collections in Cotriguaçu.

Type material

Holotype BRAZIL • ♂; “BRASIL: Rondônia: Guajará / Mirim: Proprietário : Fandinho / 10°44 ′ 57.62 ″ S, 65°19 ′ 0.32 ″ W / 138m. flor. Amaz. Isca: baço bov/ 24.II.2010 F.Coletti ”; “22366”; CEMT.

Paratypes

BRAZIL • 1 ♂; Acre, Rio Branco, Fazenda [“Faz”] Catuaba ; 9°57 ′ 19.77 ″ S, 65°51 ′ 55.72 ″ W; Feb. 1997; F. Vaz-de-Mello leg.; CEMT • 1 ♀; Rondônia, Guajará-Mirim, Sítio Coletti ; flight interception trap [“FIT”]; 10°19 ′ 47.11 ″ S, 4°45 ′ 12.5 ″ W; 170 m a.s.l.; 28 Jan. 2010; F. Coletti leg.; CEMT • 1 ♀; Pará, Tailândia, Empresa Agropalma ; 9–16 Jul. 2016; P. Silva leg.; CEMT • 1 ♀; Belterra , forest; hum/ pig trap; 3°17 ′ 47 ″ S, 54°57 ′ 48 ″ W; 132 m a.s.l.; 24 Mar. 2017; F. França leg.; T2P3; CEMT • 1 ♀; same locality as for preceding; T15P20; CEMT • 1 ♀; Mato Grosso, Querência, Fazenda São Luiz, Amazon Forest ; flight interception trap [“FIT”]; 12°39 ′ 3.21 ″ S, 52°21 ′ 9.37 ″ W; Feb. 2009; R. Andrade leg.; CEMT • 2 ♂♂; Cláudia, Fazenda [“Faz”] Continental ; fungus; 11°34 ′ 54 ″ S, 55°17 ′ 15 ″ W; 20 Feb. 2010; M.F. Souza leg.; CEMT • 1 ♂; Cotriguaçu, Matinha ; pitfall baited with fungus; 9°50 ′ 19 ″ S, 58°15 ′ 3 ″ W; 11–13 Jul. 2009; F.Z. Vaz-de-Mello leg.; BMNH • 1 ♂; same data as for preceding; CEMT • 2 ♀♀; Cotriguaçu, Fazenda [“Faz”] São Nicolau ; flight interception trap [“FIT”]; 9°49 ′ 9 ″ S, 58°15 ′ 47 ″ W; 12–14 Jul. 2009; F.Z. Vaz-de-Mello leg.; CEMT • 1 ♀; same data as for preceding; BMNH • 1 ♂; Cotriguaçu, Fazenda [“Faz”] São Nicolau ; pitfall baited with fungus; 9°49 ′ 8 ″ S, 58°15 ′ 40 ″ W; 17–21 May 2012; F.Z. Vaz-de-Mello leg.; CEMT • 1 ♂; Cotriguaçu, Fazenda [“Faz”] São Nicolau , primary forest; flight interception trap [“FIT”]; 9°50 ′ 24 ″ S, 58°15 ′ 10 ″ W; 250 m a.s.l.; 6 May 2009; Vaz-de- Mello leg.; CEMT • 1 ♂, 1 ♀; Fazenda São Nicolau (site 6), primary forest; flight int. trap; 9°49 ′ 16 ″ S, 58°15 ′ 33 ″ W; 220 m a.s.l.; 1 Dec. 2013; F. Génier leg.; CMNC 2013-118 • 1 ♀; Fazenda São Nicolau (site 5), riparian primary forest; flight int. trap; 9°51 ′ 56 ″ S 58°13 ′ 09 ″ W; 220 m a.s.l.; 3 Dec. 2013; F. Génier leg.; CMNC 2013-129 • 1 ♀; Fazenda São Nicolau (site 6), primary forest; flight int. trap; 9°49 ′ 16 ″ S, 58°15 ′ 33 ″ W; 220 m a.s.l.; 3 Dec. 2013; F. Génier leg.; CMNC 2013-131 .

PERU • 1 ♀; Madre de Dios, CICRA Los Amigos B.S; 12°34 ′ 1 ″ S, 70°06 ′ 0 ″ W; 250 m a.s.l.; 2005; T. Larsen leg.; TLC • 1 ♀; CICRA Field Station , trail 6, research plot; blue pan trap; 12.55207° S, 70.10962° W; 295 m a.s.l.; 7–9 Jun. 2011; Chaboo team leg.; SEMC PER-11-PTB-009 • 1 ♀; Rio Tambopata, Jorge Chavez ; flight intercept trap; 12°38 ′ 59 ″ S, 69°06 ′ 24 ″ W, 230 m a.s.l.; 28–29 Sep. 1999; T. Larsen leg.; CMNC • 1 ♀; Rio Palma Real Grande, Limon Camp ; flight intercept trap; 12°32 ′ 20 ″ S, 68°51 ′ 40 ″ W; 220 m a.s.l.; 9–10 Oct. 1999; T. Larsen leg.; CMNC • 1 ♀; Rio Palma Real Grande, Limon Camp ; flight intercept trap; 12°32 ′ 20 ″ S, 68°51 ′ 40 ″ W; 220 m a.s.l.; 13–14 Oct. 1999; T. Larsen leg.; CMNC .

Type locality

Guajará-Mirim, Rondônia, Brazil.

Description (holotype)

MEASUREMENTS. Length: 10 mm.

HEAD. Surface densely and distinctly punctated; with rectangular frontoclypeal carina, length greater than four-fifths of the interocular distance.

PRONOTUM. Completely punctate, with dense and distinct punctation, becoming more accentuated towards the centre of the disc, regularly convex with two medial projections anteriorly, one on each side.

HYPOMERON. Hypomeral carina slightly curved toward edge.

METAVENTRITE. With simple and shallow punctation, laterobasal region with stronger punctation, lateral region with microsculpture obscurely variolate, almost semicircular.

MESEPIMERON AND MESEPISTERNUM. With shallow punctation, stronger microsculpture obscurely variolate, almost semicircular.

HIND LEG. Metafemora with a carina along posterior edge, anterior edge with setal fringe, surface with fine punctation. Metatibiae elongated and gradually dilated towards the apex; external margin serrated.

AEDEAGUS. In dorsal view, parameres with a strong concave angulation and abruptly curved apex.

Variation and sexual dimorphism

Length ranging from 8.87 to 11.11 mm. The projections on the pronotal disc vary according to the size of the specimen, being allometrically developed as the size of the body increases. Males with ventrite VI wider medially, female ventrite VI with the same length throughout. Males also have protibial spur flattened, while in females the protibial spur is narrowed and pointed.

Geographic distribution

The specimens examined came from Brazil (Mato Grosso, Rondônia, Pará) and Peru (Madre de Dios). The species occurs in the southern region of the Amazon biome, corresponding to the Southeastern Amazonian dominion and Boreal Brazilian dominion.

Figures

Fig. 7. Canthidium stofeli sp. nov., holotype (CEMT) A. Dorsal view. B. Lateral view of aedeagus. C. Dorsal view of aedeagus. Scale bars: 1 mm.

Fig. 9. Geographical distribution of Canthidium stofeli sp. nov. (circles) and Canthidium feeri sp. nov. (triangles)..