Dichotomius tristis (Luederwaldt, 1923)

Cárdenas-Bautista, Johann Stephens, Parada-Alfonso, Jenny Andrea & Carvajal‑Cogollo, Juan E., 2020, Dung beetles (Scarabaeidae, Scarabaeinae) of the Foothills-Andean Forest strip of Villavicencio, Colombia, Check List 16 (4), pp. 821-839 : 831-832

Dichotomius tristis (Luederwaldt, 1923)

Figure 3B

Materials examined. COLOMBIA • 1♀, 19.58 mm (mean); Meta, Villavicencio, Vereda El Carmen, “ Las

Pesebreras” Farm; 04°08ʹ21.30″N, 073°39ʹ35.81″W; 630 m a.s.l.; 18 Oct. 2018; Cárdenas Johann and Parada Jenny leg.; open pasture; Crplt8; UPTC-In-00063. • 3, 19.58 mm (mean); Meta, Villavicencio, Vereda El Carmen, “Las Pesebreras” Farm; 04°08ʹ21.94″N, 073°39ʹ50.27″W; 679 m a.s.l.; 28 Apr. 2019; Cárdenas Johann and Parada Jenny leg.; wooded pasture; CrPat 7; UPTC-In-00064 .

Identification. This species can be distinguished from other Dichotomius species , in the case of males, by the head with a trituberculate horn between the eyes basis and the gena. However, it can be distinguished to the others D. a genor species group mainly by the hypomeron setae arranged in a row (Santiago Montoya pers. comm., July 26, 2109).

Distribution. This species is distributed in Brasil and Venezuela ( Vaz-de-Mello et al. 2014), but it occurs in Colombia as well. In Colombia, the species has been found in the Orinoco and Amazonian regions, probably between 100–2000 m a.s.l. For the study area, 124 individuals were found between 650–800 m a.s.l., distributed in wide areas of open grassland (86 individuals) and wooded grassland (35 individuals) and in forest cover such as in the riparian forest relics (two individuals).

Ontherus Erichson, 1847