Scybalocanthon pinopterus ( Kirsch, 1873 ),

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: 330-331

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Scybalocanthon pinopterus ( Kirsch, 1873 )


Scybalocanthon pinopterus ( Kirsch, 1873) 

( Figs. 2AView FIGURE 2, 4SView FIGURE 4, 5RView FIGURE 5, 6EView FIGURE 6)

Canthon pinopterus Kirsch, 1873: 340  ; Gillet 1911: 32 (catalog); Schmidt 1922: 65, 78 (diagnosis); Balthasar 1939: 192 (rede- scription); Balthasar 1941: 341 (catalog); Balthasar 1951: 326 (catalog); Vulcano & Pereira 1964: 625 (catalog); Krajcik 2006: 29 (catalog); Krajcik 2012: 64 (catalog).

Canthon pinopterum: Blackwelder 1944: 200  (checklist).

Scybalocanthon pinopterum  : Vaz-de-Mello 2000: 194 (checklist).

Scybalocanthon pinopterus: Halffter & Martínez 1977: 67  (species list); Ratcliffe et al. 2015: 196 (cited for Peru).

Diagnosis. Specimens of S. pinopterus  are similar to those of S. arnaudi  , S. federicoescobari  , S. martinezi  , S. papaxibe  , and S. uniplagiatus  by having the pronotum uniformly colored, or with one elliptical spot on the central disc ( Figs. 2AView FIGURE 2, 1D, 1PView FIGURE 1, 2KView FIGURE 2, 1IView 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 at the anterior portion ( Fig. 3DView FIGURE 3); endophallus with bristles right beside the FLP sclerite ( Figs. 5R, D, N, W, H, QView FIGURE 5); and additional sclerite ( AS) absent ( Figs. 5R, D, N, W, H, QView FIGURE 5). They can be distinguished from those of S. federicoescobari  , S. martinezi  , S. papaxibe  , and S. uniplagiatus  by the left paramere lacking acute projection on dorsal margin and lacking bilobate excavation on ventral margin ( Fig. 4SView FIGURE 4) (other species with acute projection and bilobate excavation on dorsal and ventral margins, respectively); from those of S. arnaudi  by the ventral margin of parameres straight on its apical one-half ( Fig. 4SView FIGURE 4), not curved outward as in S. arnaudi  ( Fig. 4EView FIGURE 4).

Description. Body. Oval, lateral edges rounded. Surface opaque, completely microgranulate. Color. Pronotum, lateral portion of hypomera, metaepisternae, metaventrite, abdominal ventrites, pygidium, and middle of femora yellow or light brown. Head, elytra, prosternum, mesoventrite, mesoepisternae, trochanters, proximal and distal portions of femora, and tibiae dark brown or black. Length. 9.4–9.8 mm. Thorax. Anterior angles of pronotum approximately 95°. Lateral margin strongly curved outward. Elytra. Striae thin and shiny, punctures inconspicuous. Eighth stria with a thin carina at the anterior portion. Aedeagus. Parameres symmetrical, obliquely truncate apically ( Fig. 4SView FIGURE 4). Dorsal margin of parameres curved inward from the basal to medial portions, and curved outward at the apical portion. 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. 5RView FIGURE 5). FLP elliptical, with three sets of bristles and microbristles right beside it ( Fig. 5RView FIGURE 5). A+SA with two superposed and elongate sclerites ( Fig. 5RView FIGURE 5).

Type material. Canthon pinopterus Kirsch  , lectotype ♀ (here designated; SMTD): “ Paruru [Paruro, Peru] / m. Kirsh” // “Typus” // “ LECTOTYPE ♀ / Canthon  / pinopterus  / Kirsch / des. F. Z. Vaz-de-Mello ”  .

Non-type material [ 17 males, 7 females]. PERU: HUÁNUCO: Tingo Maria , 8.vii.1989, [no collector]— 1♂ ( CEMT)  ; MADRE DE DIOS, Cocha Salvador, Parque Nacional del Manú , 310 m (12°0’13’’S, 71°31’36’’W), 20–21.x.2000, R. Brooks, flight interception trap (2000-70)— 5♂ 1♀ ( CMNC)GoogleMaps  ; Cocha Salvador, Parque Nacional del Manú , 310 m (11°53’45”S, 71°24’24”W), 17–19.x.2000, flight interception trap, R. Brooks— 1♂ ( CEMT)GoogleMaps  . Estación Biológica Cocha Cashu, Parque Nacional de Manú , 380 m (11°53’45’’S, 71°24’24’’W), 17–19.x.2000, R. Brooks, flight interception trap (2000-42)— 10♂ 6♀ ( CMNC, MZUFPA)GoogleMaps  .

Distribution. Known from Peru ( Fig. 6EView FIGURE 6). Endemism areas: Brazilian sub-region: South Brazilian dominion: Rondônia and Yungas provinces (see Morrone 2014; fig. 12).

Remarks. We found just one type specimen of Canthon pinopterus  in the collections studied. Analyzing the original description ( Kirsch 1873), no holotype was originally fixed, and we could not find any explicit mention that Canthon pinopterus  was described based on a single specimen. Following the International Commission on Zoological Nomenclature (1999) Recommendation 73F, we assume the type series was based on two or more individuals. Therefore, we designate here a lectotype rather than assume that the specimen we found is the holotype.














Scybalocanthon pinopterus ( Kirsch, 1873 )

Silva, Fernando A. B. & Valois, Marcely 2019

Canthon pinopterus

Balthasar, V. 1939: 192
Schmidt, A. 1922: 65
Gillet, J. J. E. 1911: 32
Kirsch, T. 1873: 340