Dichotomius (Dichotomius) robustus (Luederwaldt, 1935)

Chamorro, William, Marin-Armijos, Diego, senjo, Angelico & Vaz-De-Mello, Fernando Z., 2019, Scarabaeinae dung beetles from Ecuador: a catalog, nomenclatural acts, and distribution records, ZooKeys 826, pp. 1-343 : 121-122

Dichotomius (Dichotomius) robustus (Luederwaldt, 1935) Plate 27D

Pinotus (s. str.) robustus Luederwaldt, 1935: 337 (original description. Type locality: British Guiana, Essequibo R., Moraballi Creek).

Pinotus robustus : Blackwelder 1944: 208 (list of species from Latin America).

Dichotomius robustus : Vulcano and Pereira 1967: 584 (characters in key); Medina et al. 2001: 138 (cited for Colombia); Sarmiento-Garcés and Amat-García 2009: 292 (diagnosis), 295 (characters in key); Krajcik 2012: 92 (complete list of species); Sarmiento-Garcés and Amat-García 2014: 75 (characters in key), 78 (diagnosis); Ratcliffe et al. 2015: 197 (cited for Peru).

Dichotomius (Dichotomius) robustus : Chamorro et al. 2018: 95 (cited for Ecuador).

Types specimens.

Pinotus (s. str.) robustus Luederwaldt, 1935. Five syntypes examined, deposited at the NHML and MNHN. Lectotype to be designated in a future work on this species group.

Distribution.

Colombia, Guyana, Ecuador, and Peru.

Records examined.

ORELLANA: Estación de Biodiversidad Tiputini campamento, 220 m, Parque Nacional Yasuní (1 specimen MUTPL); Ines Arango road Tiwino-río Shiripuno, 250 m (1 specimen MUTPL). SUCUMBÍOS: Parahuaco, 290 m (1 specimen CEMT); Sansahuari, Pozo Singue, 285 m (1 specimen CEMT).

Temporal data.

Collected in January, April, and July.

Remarks.

Inhabits the lowland evergreen forests of the Amazon region from 220-290 m a.s.l. Collected manually and with pitfall traps baited with human feces.