Scarabaeinae dung beetles from Ecuador: a catalog, nomenclatural acts, and distribution records Author Chamorro, William Author Marin-Armijos, Diego Author senjo, Angelico Author Vaz-De-Mello, Fernando Z. text ZooKeys 2019 826 1 343 http://dx.doi.org/10.3897/zookeys.826.26488 journal article http://dx.doi.org/10.3897/zookeys.826.26488 1313-2970-826-1 B1550A3AE54744509A44BC4366D5E110 Onthophagus (Onthophagus) bidentatus Drapiez, 1819 Plate 39C Onthophagus bidentatus Drapiez, 1819: 134 (original description. Type locality: Cayenne). Onthophagus bidentatus : Gemminger and Harold 1869 : 1026 (catalog); Harold 1880a : 33 (redescription, distribution); Gillet 1911a : 204 (catalog); Bruch 1911 : 190 (cited for Argentina); Boucomont and Gillet 1927 : 204 (catalog of species); Boucomont 1932 : 304 (characters in key), 321 (distribution); Balthasar 1941 : 352 (cited for Peru); Blackwelder 1944 : 211 (list of species from Latin America); Balthasar 1951 : 337 (cited for Peru); Roze 1955 : 45 (cited for Venezuela); Vulcano and Pereira 1967 : 564 (characters in key); Zunino and Halffter 1997 : 161 (list of species); Medina et al. 2001 : 139 (cited for Colombia); Pulido-Herrera and Zunino 2007 : 97 (catalog of species); Ratcliffe et al. 2015 : 195 (cited for Peru); Rossini et al. 2016 : 496 (comment), 497 (figure 1A); Rossini et al. 2018b : 9 (list of species of the hircus complex). Onthophagus (Onthophagus) bidentatus : Vaz-de-Mello 2000 : 194 (cited for Brazil); Chamorro et al. 2018 : 96 (cited for Ecuador). Onthophagus bicornis Castelnau, 1840: 87 (original description); Gemminger and Harold 1869 : 1026 (cited as synonym of Onthophagus bidentatus Drapiez, cited as Onthophagus bicornis Beaud. Lafarge); Harold 1880a : 33 (cited as synonym of Onthophagus bidentatus Drap); Gillet 1911a : 204 (cited as synonym of Onthophagus bidentatus Drap, cited as O. bicornis Cast.); Boucomont and Gillet 1927 : 204 (cited as synonym of Onthophagus bidentatus Drap., cited as O. bicornis Cast.); Blackwelder 1944 : 211 (cited as synonym of Onthophagus bidentatus Drap., cited as O. bicornis Lap.); Pulido-Herrera and Zunino 2007 : 97 (cited as synonym of Onthophagus bidentatus Drapiez, see fide Blackwelder 1944 , cited as Onthophagus bicornis Laporte de Castelnau); Rossini et al. 2016 : 496 (cited as synonym of Onthophagus bidentatus Drapiez, 1819). Onthophagus femoralis Kirsch, 1871: 346 (original description); Harold 1880a : 33 (cited as synonym of Onthophagus bidentatus Drap.); Gillet 1911a : 204 (cited as synonym of Onthophagus bidentatus Drap.); Boucomont and Gillet 1927 : 204 (cited as synonym of Onthophagus bidentatus Drap.); Blackwelder 1944 : 211 (cited as synonym of Onthophagus bidentatus Drap. cited as O. femoralis Kirsch); Pulido-Herrera and Zunino 2007 : 97 (cited as synonym of Onthophagus bidentatus Drapiez, see fide Blackwelder 1944 , cited as Onthophagus femoralis Kirsch). Onthophagus semichalcites d'Orbigny , 1902: 149 (original description); Gillet, 1911a: 195 (cited for Nigeria); Boucomont and Gillet 1927 : 195 (cited for Nigeria); Rossini et al. 2016 : 496 (comment incorrect provenance, cited as synonym of Onthophagus bidentatus Drapiez, 1819). Type specimens. Onthophagus bidentatus Drapiez, 1819. The lectotype (♀) is deposited at the MNHN (see Rossini et al. 2016 : 498). Locality: Cayenna, not examined. Onthophagus bicorni s Castelnau, 1840. The lectotype (♀) is deposited at the MNHN (see Rossini et al. 2016 : 498). Locality: Cayenna (not examined). Onthophagus femoralis Kirsch, 1871. Type material not examined. Onthophagus semichalcites d'Orbigny , 1902. The lectotype (♂) is deposited at the MNHN Locality: Benin (incorrect provenance, see Rossini et al. 2016 : 498), (not examined). Distribution. Argentina, Colombia, Brazil, Ecuador, Guadalupe, Guyana, Peru, and Venezuela. Records examined. NAPO: 5 km NE Carlos Julio Arosemena Tola, 800 m (1 specimen CEMT). ZAMORA CHINCHIPE: road El Chorro-La Chonta, 1000 m (3 specimens CEMT). Temporal data. Collected in April and May. Remarks. Inhabits the evergreen foothill forests of the Amazon region from 800-1000 m a.s.l. Collected manually.