Scybalocanthon chamorroi 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 : 316

publication ID	https://doi.org/ 10.11646/zootaxa.4629.3.1
publication LSID	lsid:zoobank.org:pub:1D47B452-0A40-4BC5-9BBA-C06DEB298C9A
DOI	https://doi.org/10.5281/zenodo.4335198
persistent identifier	https://treatment.plazi.org/id/9D12E557-3A56-FF91-95F1-FB90FD2EC214
treatment provided by	Felipe
scientific name	Scybalocanthon chamorroi Silva & Valois
status	sp. nov.

Treatment

Scybalocanthon chamorroi Silva & Valois View in CoL , new species

( Figs. 1F View FIGURE 1 , 4F View FIGURE 4 , 5E View FIGURE 5 , 6C View FIGURE 6 )

Etymology. Named in honor of Willian Chamorro, who collected the specimen examined.

Diagnosis. S. chamorroi is similar to S. acrianus in body coloration ( Figs. 1F, A View FIGURE 1 ); eighth elytral stria lacking carina on anterior portion; sigmoid shaped of the FLP sclerite ( Figs. 5E, A View FIGURE 5 ); and endophallus with microbristles right beside the FLP sclerite ( Figs. 5E, A View FIGURE 5 ). However, S. chamorroi can be easily distinguished from S. acrianus by metallic body surface ( Fig. 1F View FIGURE 1 ) and impressed elytral striae ( Fig. 3A View FIGURE 3 ).

Description. Body. Oval-elongate, with variable metallic sheen. Color. Pronotum, lateral portion of hypomera, pygidium, and femora yellow or light brown. Head, internal portion of hypomera, prosternum, mesoventrite, mesoepisternae, metaventrite, metaepisternae, elytra, abdominal ventrites, trochanters, and tibiae dark brown or black.

Length. 5.9 mm. Thorax. Anterior angles of pronotum acute (approximately 70°). Lateral margin regularly curved outward, not forming an angle at the middle portion. Elytra. Striae thin and impressed ( Fig. 3A View FIGURE 3 ), punctures conspicuous. Eighth stria effaced at the basal third, lacking carina at the anterior portion. Aedeagus. Parameres symmetrical. Dorsal margin of parameres curved inward from the basal to medial portions, apical portion with an almost inconspicuous pointed projection ( Fig. 4F View FIGURE 4 ). Ventral margin of parameres curved inward at the basal portion and substraight from the medial to apical portions. SRP circular, with curved handle-shaped extension ( Fig. 5E View FIGURE 5 ). FLP sigmoid-shaped, with a set of microbristles right beside it ( Fig. 5E View FIGURE 5 ). A+SA with two superposed and elongate sclerites ( Fig. 5E View FIGURE 5 ). AS sigmoid-shaped ( Fig. 5E View FIGURE 5 ).

Type material. Holotype. ECUADOR: Sucumbios, Parque Nacional Sumaco, Río Coca - Río Supayacu, 7.vii. 2006, 380 m, Willian Chamorro— 1♂ ( CEMT).

Distribution. Known from Ecuador ( Fig. 6C View FIGURE 6 ). Endemism areas: Brazilian sub-region: Boreal Brazilian dominion: Napo province (see Morrone 2014; fig. 12).