Scybalocanthon papaxibe Silva & Valois 2019, new species
Creators: name: Silva, Fernando A. B.
name: Valois, Marcely
Publisher: name: Zenodo
Year: 2019
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Scarabaeidae
Scybalocanthon
Scybalocanthon papaxibe

description: Scybalocanthon papaxibe Silva & Valois, new species
(Figs. 1T, 4R, 5Q, 6D)
Etymology. The new specific name, “papaxibe” [papa = eater; xibé = cassava flour porridge], is a typical term in the Pará state in Brazil. This term is often attributed to people who are born in Pará due to the old habit of consuming a type of cassava flour porridge. The specific name should be treated as a Latin adjective.
Diagnosis. Specimens of S. papaxibe are similar to those of S. arnaudi, S. federicoescobari, S. martinezi, S. pinopterus, and S. uniplagiatus by having the pronotum uniformly colored, or with one elliptical spot on the central portion (Figs. 1T, 2A, 1P, 2K, 1D, 1I); femora almost completely yellow or brown, with black spots only on the tips (Fig. 3G); eighth elytral stria with thin carina on anterior portion (Fig. 3D); endophallus with bristles right beside the FLP sclerite (Figs. 5Q, N, W, D, H); and additional sclerite (AS) absent (Figs. 5Q, N, W, D, H). They can be distinguished from those of S. pinopterus and S. arnaudi by the strongly asymmetrical parameres; left paramere with acute projection on dorsal margin and bilobate excavation on ventral margin (Fig. 4R) (other species with slightly asymmetrical parameres, lacking acute projection and bilobate excavation on dorsal and ventral margins, respectively (Figs. 4S, E)); from those of S. uniplagiatus, S. martinezi, and S. federicoescobari by the bilobate excavation on the ventral margin of the left paramere wider than deep in lateral view, extending along one-fourth of the paramere margin in lateral view (Fig. 4R) (in S. martinezi the bilobate excavation is wider and deeper, extending at least one-half of the paramere margin (Fig. 4O); in S. uniplagiatus its excavation extending along one-third of the paramere margin (Fig. 4W)); in S. federicoescobari its excavation is deeper than wide in lateral view (Fig. 4I)).
Description. Body. Oval-elongate. Surface opaque, completely microgranulate. Color. Head and elytra dark brown. Other parts yellow or light brown. Length. 7.8–9.5 mm. Thorax. Anterior angles of pronotum approximately 85°. Lateral margin regularly curved outward, not forming an angle at the middle portion. Elytra. Striae thin and shiny, weakly impressed, punctures inconspicuous. Eighth stria with a thin carina at the anterior portion. Aedeagus. Parameres strongly asymmetrical (Fig. 4R). Dorsal margin of right paramere curved inward, apex obliquely truncate. Ventral margin of right paramere substraight, with a rounded excavation at the basal portion. Dorsal margin of left paramere curved inward from the basal to medial portions, apical portion with a short and pointed projection. Ventral margin of left paramere substraight, with a bilobate excavation at the basal portion, apical portion pointed. SRP circular, with rounded handle-shaped extension (Fig. 5Q). FLP short, comma-shaped, with three sets of bristles right beside it (Fig. 5Q). A+SA with two superposed and elongate sclerites (Fig. 5Q).
Type material. Holotype. BRAZIL: PARÁ: Pau d’Arco, Fazenda Marajoara (50°16’W, 7°50’S), 12.x.1998, P.Y. Scheffler— 1♂ (CEMT). Paratypes [12 males, 9 females]. BRAZIL: PARÁ: Redenção, Pinkaiti Aik (52°02’W, 7°46’S), vi.1999, P.Y. Scheffler— 1♀ (CEMT); same data but x.1999 — 1♂ (CEMT); Santarém, Reserva Tapajós, Amazon rainforest (55°39’842” W, 2°45’463”S), 25.xii.2008, pitfall, R.Andrade— 1♀ (CEMT); Curionópolis, Serra Leste (49°38’14”W, 5°58’27”S), 26.i.2016, pitfall, T. Portella— 4♂ (CEMT); Tucuruí (3°46’26’’S, 49°41’19’’W), i.1979, Alvarenga— 2♂ 1♀ (CMNC). TOCANTINS, Araguaína, 22.xi.2014, Mata, Marta, & Sara— 1♂ (MZUF- PA); Araguaína, viii.2014, M.L.S. Rippel— 1♂ (MZUFPA); Araguaína, Universidade Federal do Tocantins-Escola de Medicina Veterinária e Zoologia, Mata de Galeria, Corrego da vaca, 16.iii.2017, pitfall 01, D. Moura & S. Dan-tas— 1♂ 2♀ (MZUFPA); Araguaína, área aberta, 23.iii.2017, pitfall 04, D. Moura & S. Dantas— 2♀ (MZUFPA); Araguaína, Universidade Federal Tocantins-Escola de Medicina Veterinária e Zoologia, 9.iv.2016, pitfall, S. Dan-tas— 2♂ 2♀ (MZUFPA).
Distribution. Known from Brazil (Pará and Tocantins) (Fig. 6D). Endemism areas: Chacoan sub-region: South-eastern Amazonian dominion: Xingu-Tapajós province (see Morrone 2014; fig. 12).
description: Published as part of Silva, Fernando A. B. & Valois, Marcely, 2019, A taxonomic revision of the genus Scybalocanthon Martínez, 1948 (Coleoptera Scarabaeidae: Scarabaeinae: Deltochilini), pp. 301-341 in Zootaxa 4629 (3) on page 330, DOI: 10.11646/zootaxa.4629.3.1, http://zenodo.org/record/3995508