Scybalocanthon federicoescobari 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 federicoescobari

description: Scybalocanthon federicoescobari Silva & Valois, new species
(Figs. 1I, 4I, 5H, 6D)
Etymology. Named in honor of Federico Escobar, a scarab ecologist who was responsible for collecting the type specimens.
Diagnosis. Specimens of S. federicoescobari are similar to those of S. arnaudi, S. martinezi, S. papaxibe, S. pinopterus, and S. uniplagiatus by having the pronotum uniformly colored, or with one elliptical spot on the central portion (Figs. 1I, 2A, 1P, 2K, 1D, 1T); 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. 5H, R, N, W, D, Q); and additional sclerite (AS) absent (Figs. 5H, R, N, W, D, Q). 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. 4I) (other species with slightly asymmetrical parameres, lacking acute projection and bilobate excavation on dorsal and ventral margins, respectively (Figs. 4E, 4S)); from those of S. martinezi, S. papaxibe, and S. uniplagiatus by the bilobate excavation of the ventral margin of the left paramere deeper than wide in lateral view, extending along one-fourth of the paramere margin (Fig. 4I) (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. papaxibe its excavation is wider than deep in the lateral view (Fig. 4R)).
Description. Body. Oval-elongate. Surface opaque, completely microgranulate. Color. Most of pronotum, hypomera, metaepisternae, metaventrite, abdominal ventrites, pygidium, and femora yellow or light brown. Head, elytra, prosternum, mesoventrite, mesoepisternae, trochanters, and tibiae dark brown. Length. 7.8–9.5 mm. Thorax. Pronotum with one brown rounded spot at the anterocentral portion. Spot elliptical in some specimens.Anterior angles of pronotum approximately 85°. Lateral margin regularly curved outward, not forming an angle at the middle portion. Elytra. Striae thin and shiny, punctures inconspicuous. Eighth stria with a thin carina at the anterior portion. Aedeagus. Parameres strongly asymmetrical (Fig. 4I). 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. 5H). FLP short, comma-shaped, with three sets of bristles right beside it (Fig. 5H). A+SA with two superposed and elongate sclerites (Fig. 5H).
Type material. Holotype. COLOMBIA: GUAVIARE, Reserve Nukak, Cerro Moyano (71°10’58”W, 02°10’35”N), II.1996, pitfall human feces, 250 m, F. Escobar— 1♂ (CEMT). Paratype. COLOMBIA: GUAVI- ARE, Reserve Nukak, Cerro Moyano (71°10’58”W, 02°10’35”N), II.1996, pitfall human feces, 250 m, F. Esco-bar— 1♀ (CEMT).
Distribution. Known from Colombia (Fig. 6D). Endemism areas: Brazilian sub-region: Boreal Brazilian dominion: Imeri 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 321, DOI: 10.11646/zootaxa.4629.3.1, http://zenodo.org/record/3995508