Scybalocanthon adisi 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: 310-311

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Scybalocanthon adisi Silva & Valois

new species

Scybalocanthon adisi Silva & Valois  , new species

( Figs. 1BView FIGURE 1, 4BView FIGURE 4, 5BView FIGURE 5, 6AView FIGURE 6)

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

Diagnosis. Specimens of S. adisi  ( Fig. 1BView FIGURE 1) are similar to those of S. aereus  ( Fig. 1CView FIGURE 1) in body coloration; aedeagus with parameres elongate, subrectangular, not excavated ventrally ( Figs. 4View FIGURE 4 B–C); and endophallus lacking bristles or microbristles close to the FLP sclerite ( Figs. 5View 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. 4BView FIGURE 4). Dorsal and ventral margins of parameres substraight. SRP circular, with substraight handle-shaped extension ( Fig. 5BView FIGURE 5). FLP I-shaped ( Fig. 5BView FIGURE 5). A+SA with two superposed and elongate sclerites ( Fig. 5BView FIGURE 5). AS as in Fig. 5BView 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. 6AView FIGURE 6). Endemism areas: Brazilian sub-region: Boreal Brazilian dominion: Napo and Imerí provinces (see Morrone 2014; fig. 12).