Scybalocanthon federicoescobari Silva & Valois,

Silva, Fernando A. B. & Valois, Marcely, 2019, A taxonomic revision of the genus Scybalocanthon Martínez, 1948 (Coleoptera Scarabaeidae: Scarabaeinae: Deltochilini), Zootaxa 4629 (3), pp. 301-341: 321

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Scybalocanthon federicoescobari Silva & Valois

new species

Scybalocanthon federicoescobari Silva & Valois  , new species

( Figs. 1IView FIGURE 1, 4IView FIGURE 4, 5HView FIGURE 5, 6DView FIGURE 6)

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. 1IView FIGURE 1, 2AView FIGURE 2, 1PView FIGURE 1, 2KView FIGURE 2, 1D, 1TView FIGURE 1); femora almost completely yellow or brown, with black spots only on the tips ( Fig. 3GView FIGURE 3); eighth elytral stria with thin carina on anterior portion ( Fig. 3DView FIGURE 3); endophallus with bristles right beside the FLP sclerite ( Figs. 5H, R, N, W, D, QView FIGURE 5); and additional sclerite ( AS) absent ( Figs. 5H, R, N, W, D, QView FIGURE 5). 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. 4IView FIGURE 4) (other species with slightly asymmetrical parameres, lacking acute projection and bilobate excavation on dorsal and ventral margins, respectively ( Figs. 4E, 4SView FIGURE 4)); 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. 4IView FIGURE 4) (in S. martinezi  the bilobate excavation is wider and deeper, extending at least one-half of the paramere margin ( Fig. 4OView FIGURE 4); in S. uniplagiatus  its excavation extending along one-third of the paramere margin ( Fig. 4WView FIGURE 4); in S. papaxibe  its excavation is wider than deep in the lateral view ( Fig. 4RView FIGURE 4)).

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. 4IView FIGURE 4). 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. 5HView FIGURE 5). FLP short, comma-shaped, with three sets of bristles right beside it ( Fig. 5HView FIGURE 5). A+SA with two superposed and elongate sclerites ( Fig. 5HView FIGURE 5).

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)GoogleMaps  . Paratype. COLOMBIA: GUAVI- ARE, Reserve Nukak, Cerro Moyano (71°10’58”W, 02°10’35”N), II.1996, pitfall human feces, 250 m, F. Escobar— 1♀ ( CEMT)GoogleMaps  .

Distribution. Known from Colombia ( Fig. 6DView FIGURE 6). Endemism areas: Brazilian sub-region: Boreal Brazilian dominion: Imeri province (see Morrone 2014; fig. 12).