Onthophagus retusus Harold, 1869

Höglinger, Marc, Huber, Andrea & Eichler, Klaus, 2019, Entwicklung Medizintechnik 2019 bis 2030: stationäre Rehabilitation & amp; stationäre Psychiatrie, The Coleopterists Bulletin 73 (3), pp. 535-550 : 538

Onthophagus retusus Harold

Onthophagus retusus ( Fig. 3 ) is often found in Oaxaca, extends east to Veracruz, and reaches its western limit in Hidalgo ( Figs. 8 , 9 ). There are

places of transition with O. chevrolati in Hidalgo and the lower parts of the mountains reaching the High Plateau (Zunino and Halffter 1988a; Arriaga et al. 2012). The species is found at elevations ranging 1,800 –3,400 m, and it can occur lower in its southern distribution area (Zunino and Halffter 1988a; Arriaga et al. 2012; Halffter et al. 2019). Because O. retusus and O. chevrolati share an elevational range and express morphological similarities, it is important to be able to discern the species. The main diagnostic characters to identify O. retusus are that it is larger, with a very dark copper color, and, although its punctation is very variable, it tends to be formed by less defined punctures than in O. chevrolati , and the punctures are sometimes elongated longitudinally. Adults are collected abundantly in pine and pine-oak forest, as well as in shrublands and grasslands (Mart´ın-Piera and Lobo 1993; Arellano and Halffter 2003; Arriaga et al. 2012).

Figures

Fig. 3. Onthophagus retusus. A) Illustration of female, B) Illustration of male, C) Female, dorsal habitus, D) Male, dorsal habitus.

Fig. 8. Known distribution of Onthophagus chevrolati, Onthophagus retusus, and Onthophagus aureofuscus in Mexico.

Fig. 9. Known distribution of Onthophagus species in Oaxaca, Mexico.