Name Authorship Pages Forms Locality Notes
Orectognathus nanus Taylor, 1977 605, figs. 20-22 w.q. AUSTRALIA (Queensland)
Orectognathus nigriventris Mercovich, 1958 195, fig. w. AUSTRALIA (New South Wales) Date of publication 28.vii.1958.
Orectognathus parvispinus Taylor, 1977 603, figs. 17-19 w.q. AUSTRALIA (Queensland)
Orectognathus perplexus Smith, 1876c 491 w.q. NEW ZEALAND
Orectognathus phyllobates Brown, 1958b 25, fig. 4 w. AUSTRALIA (Queensland)
Orectognathus robustus Taylor, 1977 599, figs. 14-16 w.q. AUSTRALIA (Queensland)
Orectognathus roomi Taylor, 1977 606, figs. 24-27 w. NEW GUINEA (Papua New Guinea)
Orectognathus rostratus Lowery, 1967 137, figs. 1, 2 w.q. AUSTRALIA (New South Wales)
Orectognathus sarasini Emery, 1914f 416 w.m. NEW CALEDONIA
Orectognathus satan Brown, 1953k 102, fig. 3 w.q. AUSTRALIA (Queensland)
Orectognathus sexspinosus Forel, 1915b 39, pl. 2, figs. 1, 2 w.q.m. AUSTRALIA (Queensland)
Orectognathus velutinus Taylor, 1977 610, figs. 37-42 w. NEW GUINEA (Papua New Guinea)
Orectognathus versicolor Donisthorpe, 1940a 46 w. AUSTRALIA (Queensland)
Oreomyrma Wheeler, 1914e 118 (in text) [as subgenus of Myrmica]
Ornatinoda Enzmann, 1944 61 [as "branch" of Pseudomyrma]
Orthocrema Santschi, 1918d 182 [as subgenus of Crematogaster]
Orthocrema esterelana Bernard, 1978b 43, fig. 1 w.q.m. FRANCE
Orthonotomyrmex Ashmead, 1906 31
Orthonotus Ashmead, 1905c 384
Otomyrmex Forel, 1891c 147 [as subgenus of Cataulacus]
†Ovalicapito Hong, 2002 596
†Ovalicapito fushunensis Hong, 2002 596, figs. 519-527 w. CHINA (Liaoning, Fushun Amber, Eocene)
†Ovaligastrula Hong, 2002 599
†Ovaligastrula xilutianensis Hong, 2002 599, figs. 528-537 w. CHINA (Liaoning, Fushun Amber, Eocene)
Overbeckia Viehmeyer, 1916a 151
Overbeckia jambiensis Klimeš, 2022 569, figs. 4, 7 w. INDONESIA (Sumatra)
Overbeckia papuana Klimeš, 2022 570, figs. 5-7 w.q.m. PAPUA NEW GUINEA
Overbeckia subclavata Viehmeyer, 1916a 152, figs. 11, 12 w.q.m. SINGAPORE
Oxyepoecus Santschi, 1926d 6
Oxyepoecus bidentatus Delsinne & Mackay, 2011 2, figs. 2, 3 w. PARAGUAY
Oxyepoecus browni Albuquerque & Brandão, 2004 60, figs. 1a-c w. BRAZIL (Minas Gerais)
Oxyepoecus bruchi Santschi, 1926d 6, figs. A-D q. ARGENTINA (Córdoba)
Oxyepoecus crassinodus Kempf, 1974b 482, figs. 2, 8, 15, 21 w. BRAZIL (Paraná, Santa Catarina)
Oxyepoecus ephippiatus Albuquerque & Brandão, 2004 64, figs. 2a-c w.q. BRAZIL (Amazonas)
Oxyepoecus kempfi Albuquerque & Brandão, 2004 67, figs. 3a-c w. BRAZIL (Piauí)
Oxyepoecus longicephalus Albuquerque & Brandão, 2004 69, figs. 4a-c w. BRAZIL (Rio Grande do Sul)
Oxyepoecus myops Albuquerque & Brandão, 2009 295, figs. 1a-c, 6 w.q. BRAZIL (São Paulo)
Oxyepoecus plaumanni Kempf, 1974b 492, figs. 27-30 w.q. BRAZIL (Rio Grande do Sul)
Oxyepoecus quadratus Albuquerque & Brandão, 2004 73, figs. 6a-c w. ECUADOR
Oxyepoecus regularis Ulysséa & Brandão, 2012 169, figs. 1, 2 w.q. BRAZIL (Bahia)
Oxyepoecus reticulatus Kempf, 1974b 502, figs. 23-26 w.q. BRAZIL (Santa Catarina)
Oxyepoecus rosai Albuquerque & Brandão, 2009 304, figs. 5a-c, 8 w.q. BRAZIL (São Paulo)
Oxyepoecus striatus Mackay & Delsinne, 2011 5, fig. 4 w. PARAGUAY
Oxyepoecus turgidus Kempf, 1969 278, figs. 1-3 w. BRAZIL (São Paulo, Goiás)
Oxyepoecus vivax Kempf, 1974b 508, figs. 31-33, 38, 39 q. BRAZIL (Minas Gerais)
Oxygyne Forel, 1901j 375 [as subgenus of Crematogaster]
†Oxyidris Wilson, 1985a 5
†Oxyidris antillana Wilson, 1985a 5, fig. 3 w. DOMINICAN REPUBLIC (Dominican Amber, Miocene)
Oxyopomyrmex André, 1881c 72
Oxyopomyrmex (Goniomma) blanci r. tuneticus Forel, 1905e 175 w. TUNISIA