Scybalocanthon federicoescobari Silva & Valois, 2019

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

publication ID

https://doi.org/10.11646/zootaxa.4629.3.1

publication LSID

lsid:zoobank.org:pub:1D47B452-0A40-4BC5-9BBA-C06DEB298C9A

DOI

http://doi.org/10.5281/zenodo.4335180

persistent identifier

http://treatment.plazi.org/id/9D12E557-3A4D-FF8A-95F1-F969FD0AC339

treatment provided by

Felipe

scientific name

Scybalocanthon federicoescobari Silva & Valois
status

new species

Scybalocanthon federicoescobari Silva & Valois   , new species

( Figs. 1I View FIGURE 1 , 4I View FIGURE 4 , 5H View FIGURE 5 , 6D View 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. 1I View FIGURE 1 , 2A View FIGURE 2 , 1P View FIGURE 1 , 2K View FIGURE 2 , 1D, 1T View FIGURE 1 ); femora almost completely yellow or brown, with black spots only on the tips ( Fig. 3G View FIGURE 3 ); eighth elytral stria with thin carina on anterior portion ( Fig. 3D View FIGURE 3 ); endophallus with bristles right beside the FLP sclerite ( Figs. 5H, R, N, W, D, Q View FIGURE 5 ); and additional sclerite ( AS) absent ( Figs. 5H, R, N, W, D, Q View 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. 4I View FIGURE 4 ) (other species with slightly asymmetrical parameres, lacking acute projection and bilobate excavation on dorsal and ventral margins, respectively ( Figs. 4E, 4S View 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. 4I View FIGURE 4 ) (in S. martinezi   the bilobate excavation is wider and deeper, extending at least one-half of the paramere margin ( Fig. 4O View FIGURE 4 ); in S. uniplagiatus   its excavation extending along one-third of the paramere margin ( Fig. 4W View FIGURE 4 ); in S. papaxibe   its excavation is wider than deep in the lateral view ( Fig. 4R View 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. 4I View 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. 5H View FIGURE 5 ). FLP short, comma-shaped, with three sets of bristles right beside it ( Fig. 5H View FIGURE 5 ). A+SA with two superposed and elongate sclerites ( Fig. 5H View 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. 6D View FIGURE 6 ). Endemism areas: Brazilian sub-region: Boreal Brazilian dominion: Imeri province (see Morrone 2014; fig. 12).