Scybalocanthon adisi 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 : 310-311

publication ID 10.11646/zootaxa.4629.3.1

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Scybalocanthon adisi Silva & Valois

sp. nov.

Scybalocanthon adisi Silva & Valois View in CoL , new species

( Figs. 1B View FIGURE 1 , 4B View FIGURE 4 , 5B View FIGURE 5 , 6A View FIGURE 6 )

Etymology. Named in honor of Dr. Joachim Adis, who collected some of the type specimens.

Diagnosis. Specimens of S. adisi ( Fig. 1B View FIGURE 1 ) are similar to those of S. aereus ( Fig. 1C View FIGURE 1 ) in body coloration; aedeagus with parameres elongate, subrectangular, not excavated ventrally ( Figs. 4 View FIGURE 4 B–C); and endophallus lacking bristles or microbristles close to the FLP sclerite ( Figs. 5 View FIGURE 5 B–C). However, S. adisi can be easily distinguished by the lack of a carina at the anterior portion of the eighth elytral stria.

Description. Body. Oval, lateral edges rounded. Surface opaque, completely microgranulate. Color. Pronotum, hypomera (except internal margin), metaventrite, abdominal ventrites, pygidium, middle of femora, and tibiae yellow or light brown. Head, internal margin of hypomera, prosternum, mesoventrite, mesoepisternae, metaepisternae, elytra, trochanters, and proximal and distal portions of femora dark brown. Length. 6.0– 8.9 mm. Thorax. Anterior angles of pronotum acute (approximately 85°). Lateral margin regularly curved outward, not forming an angle at the middle portion. Elytra. Striae thin and opaque, weakly impressed, punctures inconspicuous. Interstrial surface with ocellar punctures, microgranulate. Eighth stria effaced at the basal third, lacking carina at the anterior portion.

Aedeagus. Parameres symmetrical and elongate, with subrectangular shape, truncate apically ( Fig. 4B View FIGURE 4 ). Dorsal and ventral margins of parameres substraight. SRP circular, with substraight handle-shaped extension ( Fig. 5B View FIGURE 5 ). FLP I-shaped ( Fig. 5B View FIGURE 5 ). A+SA with two superposed and elongate sclerites ( Fig. 5B View FIGURE 5 ). AS as in Fig. 5B View FIGURE 5 .

Type material. Holotype. BRAZIL: AMAZONAS: Rio Taruma Mirim NW Manaus, 24.xi.1976, J. Adis— 1♂ ( CEMT) . Paratypes. BRAZIL: AMAZONAS, Ega [= Tefé] (3°22’S, 64°42’W), [no date], [anonymous]— 1♂ ( CMNC) GoogleMaps ; Rio Tarumã Mirim , NW Manaus (3°0’58’’S, 60°10’30’’W), 13.i.1977, J. Adis— 1♂ ( CMNC) GoogleMaps ; Rio Ta- rumã Mirim , NW Manaus (3°0’58’’S, 60°10’30’’W), 16.ii.1977, J. Adis— 1♂ ( CMNC) GoogleMaps ; Rio Tarumã Mirim , NW Manaus (3°0’58’’S, 60°10’30’’W), 27.iv.1977, J. Adis— 1♂ ( CMNC) GoogleMaps ; Rio Tarumã Mirim , NW Manaus (3°0’58’’S, 60°10’30’’W), 11.v.1977, J. Adis— 1♀ ( CMNC) GoogleMaps ; Rio Tarumã Mirim , NW Manaus (3°0’58’’S, 60°10’30’’W), 8.ii.1977 — 1♀ ( CEMT) GoogleMaps . ECUADOR: PASTAZA: Lorocachi, 220 m, 16–27.ii.1996, Mayala C. Carpio— 1♀ ( CEMT) .

Distribution. Known from Brazil (Amazonas) and Ecuador ( Fig. 6A View FIGURE 6 ). Endemism areas: Brazilian sub-region: Boreal Brazilian dominion: Napo and Imerí provinces (see Morrone 2014; fig. 12).

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