Scybalocanthon kaestneri ( Balthasar, 1939 ),

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: 322-323

publication ID

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

publication LSID

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

persistent identifier

http://treatment.plazi.org/id/9D12E557-3A4C-FF88-95F1-FCEDFD2EC121

treatment provided by

Felipe

scientific name

Scybalocanthon kaestneri ( Balthasar, 1939 )
status

 

Scybalocanthon kaestneri ( Balthasar, 1939) 

( Figs. 1KView FIGURE 1, 3EView FIGURE 3, 4KView FIGURE 4, 5JView FIGURE 5, 6EView FIGURE 6)

Canthon kästneri Balthasar, 1939: 193  , 227 (original description); Vulcano & Pereira 1967: 552 (distribution, identification key).

Canthon kaestneri: Blackwelder 1944: 199  (checklist); Pereira & Martínez 1956: 114 (comment); Krajcik 2006: 28 (catalog); Carvajal et al. 2011: 314 (cited for Ecuador); Krajcik 2012: 63 (catalog).

Scybalocanthon kästneri: Vulcano & Pereira 1964: 616  (distribution).

Scybalocanthon kaestneri: Halffter & Martínez 1977: 68  (checklist); Carvajal et al. 2011: 314 (cited for Ecuador); Bezdek & Hajek 2011: 363 (catalog of types); Chamorro et al. 2018: 87 (fig. 10B), 98 (cited for Ecuador); Chamorro et al. 2019: 229 View Cited Treatment , 230 (catalog of dung beetles species from Ecuador).

Diagnosis. Specimens of S. kaestneri  are readily distinguishable from all other species by pronotum with four black spots (two central spots with triangular shape and two lateral spots rounded) ( Fig. 2KView FIGURE 2); femora almost completely yellow or brown, with black spots only on the tips ( Fig. 3GView FIGURE 3); parameres of aedeagus slightly asymmetrical, dorsal margin of left paramere strongly curved outward at apical portion ( Fig. 4KView FIGURE 4); endophallus with bristles right beside the FLP sclerite ( Fig. 5JView FIGURE 5); and additional sclerite ( AS) absent ( Fig. 5JView FIGURE 5). A specimen from Napo, Ecuador, has only three black spots on pronotum (one spot at posterior margin with triangular shape and two lateral spots rounded).

Description. Body. Oval-elongate, with variable metallic sheen. Surface completely microgranulate. Color. Head and elytra opaque, pronotum with metallic sheen. Most of pronotum, hypomera, prosternum, mesoventrite, central portion of metaventrite, metaepisternae, lateral portion of abdominal ventrites, pygidium, and legs yellow or light brown. Head, some spots of pronotum, elytra, and central portion of abdominal ventrites black. Length. 9.0–10.0 mm. Thorax. Anterior angles of pronotum approximately 90°. Lateral margin strongly curved outward at the middle portion. Elytra. Striae thin and impressed, with elliptical punctures. Eighth stria with a thin carina at the anterior portion. Aedeagus. Parameres slightly asymmetrical, obliquely truncate apically ( Fig. 4KView 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 rounded handle-shaped extension ( Fig. 5JView FIGURE 5). FLP subelliptical, with dense set of bristles right beside it ( Fig. 5JView FIGURE 5). A+SA with two superposed and elongate sclerites ( Fig. 5JView FIGURE 5).

Type material. Canthon kaestneri Balthasar  , lectotype ♀ (here designated; NMPC): “ Equador ” // “TY- PUS” // “ Kastneri / m. ” // “ Scybalocanthon  / kaestneri (Balth.)  / Det. B. D. Gill’ 96” // “ LECTOTYPE / Canthon  ♀ / kaestneri  / Balth / des. F. Z. Vaz-de-Mello / 2013”. Paralectotypes  2♀ ( NMPC): “Mera / Ecuador ” // “Typus” // “ PARALECTOTYPE / Canthon  ♀ / kaestneri Balth.  / des. F. Z. Vaz-de-Mello ”  .

Non-type material [ 18 males, 36 females]: ECUADOR: MORONA-SANTIAGO, Untsuants sitio 4, 1100 m, 20.i.2002, J. Celi & M. Ortega, pitfall trap, human feces— 1♂ 1♀ ( CMNC)  ; Untsuants sitio 6, 1100 m, 23.i.2002, J. Celi & M. Ortega, pitfall trap, fish— 1♀ ( CMNC)  ; Untsuants sitio 7, 900 m, 23.i.2002, J. Celi & M. Ortega, pitfall trap, human feces— 1♀ ( CMNC)  ; Bosque Domono , 22.viii.1997, 1650 m, C. Carpio— 1♂ 1♀ ( CEMT)  ; PASTA- ZA, 22 km SE Puyo , 900 m (1°37’11’’S, 77°50’40’’W), 12–16.vii.1976, S. Peck, forest, dung traps (dung traps 39–41)— 1♀ ( CMNC)GoogleMaps  ; 22 km SE Puyo , 900 m (1°37’11’’S, 77°50’40’’W), 12–16.vii.1976, S. Peck, forest, carrion traps (carrion traps 42–43)— 1♂ ( CMNC)GoogleMaps  ; 25 km NNE Puyo , 1000 m (1°18’19’’S, 77°52’59’’W), 4–13.vii.1976, S. Peck, forest, dung traps (dung trap 25-27)— 3♂ 16♀ ( CMNC, MZUFPA)GoogleMaps  ; 9 km ESE Veracruz , 900 m (1°33’49’’S, 77°53’8’’W), 22–24.viii.1975, R. Webster, forest, dung traps— 1♂ 1♀ ( CMNC)GoogleMaps  ; Llandia , 17 km N Puyo, 1000 m (1°21’3’’S, 77°58’4’’W), 16.vii.1994, F. Génier, remnant rainforest, hand collecting— 1♂ ( CMNC)GoogleMaps  ; Llandia , 17 km N Puyo, 1000 m (1°21’3’’S, 77°58’4’’W), 19.vii.1994, F. Génier, remnant rainforest, feces trap— 4♂ 3♀ ( CMNC)GoogleMaps  ; Llandia , 17 km N Puyo, 1000 m (1°21’3’’S, 77°58’4’’W), 20.vii.1994, F. Génier, remnant rainforest, feces trap— 1♀ ( CMNC)GoogleMaps  ; Oglán River , 29.x. 2008, 809 m, F. Gallo & E. Camillo— 1♀ ( CEMT)  ; Mera, Estação Biológica Pinto Mirador UTE [Usina Termelétrica] (78°06’29”W, 1°27’25”S), 22.iii.2012, pitfall pig feces, 1000 m, C. Luzuriaga— 5♂ 9♀ ( CEMT)GoogleMaps  ; Mera, Estação Biológica Pinto Mirador UTE [Usina Termelétrica] (78°1’00”W, 2°31’59”S)— 1♂ ( CEMT)GoogleMaps  ; NAPO: Puerto Napo , 480 m—2 [unsexed specimens] ( MQCAZ)  .

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

NMPC

National Museum Prague

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Coleoptera

Family

Scarabaeidae

Genus

Scybalocanthon

Loc

Scybalocanthon kaestneri ( Balthasar, 1939 )

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

Canthon kästneri

Vulcano, M. A. & Pereira, F. S. 1967: 552
Balthasar, V. 1939: 193
Loc

Canthon kaestneri:

Krajcik, M. 2012: 63
Carvajal, V. & Villamarin, S. & Ortega, A. M. 2011: 314
Krajcik, M. 2006: 28
Pereira, F. S. & Martinez, A. 1956: 114
Blackwelder, R. 1944: 199
Loc

Scybalocanthon kästneri:

Vulcano, M. A. & Pereira, F. S. 1964: 616
Loc

Scybalocanthon kaestneri: Halffter & Martínez 1977: 68

Chamorro, W. & Marin-Armijos, D. & Asenjo, A. & Vaz-de-Mello, F. Z. 2019: 229
Chamorro, W. & Marin-Armijos, D. & Granda, V. & Vaz-de-Mello, F. Z. 2018: 87
Carvajal, V. & Villamarin, S. & Ortega, A. M. 2011: 314
Bezdek, A. & Hajek, J. 2011: 363
Halffter, G. & Martinez, A. 1977: 68