Name Authorship Pages Forms Locality Notes
Strumigenys xenohyla Bolton, 1983 398, figs. 54, 73 w. CAMEROON
Strumigenys xenopilus Tang & Guénard, 2023 120, fig. 40, table 2 w. CHINA (Hainan)
Strumigenys xenos Brown, 1955h 182 q. AUSTRALIA (Victoria)
Strumigenys xochipili Bolton, 2000 561 w. MEXICO (Michoacan)
Strumigenys xoko dos Santos-Neto et al., 2024 641, figs. 2, 4, 5 w.q. BRAZIL (Sergipe, Bahia)
Strumigenys yaleopleura Brown, 1988e 41 w.q. AUSTRALIA (Queensland)
Strumigenys yamanei Tang & Guénard, 2023 123, fig. 41, tables 2, 6 w. TAIWAN
Strumigenys yanintra Bolton, 2000 900 w. INDONESIA (Bali)
Strumigenys yasumatsui Brown, 1971c 84, figs. 8, 9 w.q. NEW GUINEA (Papua New Guinea)
Strumigenys zagan Bolton, 2000 804 w. BORNEO (Brunei)
Strumigenys zakharovi Dlussky, 1993b 60, fig. 2d,e w. TONGA
Strumigenys zandala Bolton, 1983 399, fig. 66 w. EQUATORIAL GUINEA
Strumigenys zanderi Tang & Guénard, 2023 125, figs. 42, 43, tables 2, 6 w.dq. CHINA (Hainan)
Strumigenys zapyx Bolton, 2000 916, figs. 483, 516 w. INDONESIA (Sulawesi)
Strumigenys zemi Booher et al., 2019 348. figs. 7-9 w.q. DOMINICAN REPUBLIC
Strumigenys zhenghuii Tang & Guénard, 2023 129, fig. 44, tables 2, 6 w. CHINA (Yunnan)
Strumigenys zygon Bolton, 2000 971 w. AUSTRALIA (Queensland)
Sulcomyrmex Kratochvíl, 1941b 84 [as subgenus of Tetramorium]
†Sussudio Boudinot et al., 2022 142
Syllophopsis Santschi, 1915c 259 [as subgenus of Monomorium]
Syllophopsis arnoldi Santschi, 1921c 120, fig. 2d,e w. SOUTH AFRICA Genus misspelled as Syllopsis in original description title; correctly spelled in legend of fig. 2.
Syllophopsis brevidorsa Liang et al., 2025 105, fig. 1 w. CHINA (Chongqing, Guangxi)
Syllophopsis cryptobia Santschi, 1921c 119, fig. 2a-c w. DEMOCRATIC REPUBLIC OF THE CONGO
Syllophopsis elgonensis Santschi, 1935b 267, fig. 4 w. KENYA
Syllophopsis magnocula Liang et al., 2025 105, fig. 2 w. CHINA (Guangxi)
Syllophopsis peetersi Akbar et al., 2021 405, figs. 2-6 w. INDIA (Kerala)
Syllophopsis saudiensis Aldawood, 2016 140, figs. 2, 3 w. SAUDI ARABIA
Symbiomyrma Arnol'di, 1930c 267
Symbiomyrma karavajevi Arnol'di, 1930c 269, figs. 1-5 q.m. UKRAINE
Symmyrmica Wheeler, 1904a 3
Symmyrmica chamberlini Wheeler, 1904a 5, pl. 1, figs. 1-7 w.q.m. U.S.A. (Utah)
Sympheidole Wheeler, 1904a 7
Sympheidole elecebra Wheeler, 1904a 8, pl. 2, figs. 8-11 q.m. U.S.A. (Colorado)
Synsolenopsis Forel, 1918b 155 [as subgenus of Solenopsis]
Synsolenopsis egregia Kusnezov, 1953d 342, figs. 1-3 s.w.q. ARGENTINA (Tucumán)
Synsolenopsis eximia Kusnezov, 1953d 346, fig. 4 w. ARGENTINA (Formosa)
†Syntaphus Donisthorpe, 1920b 84
†Syntaphus wheeleri Donisthorpe, 1920b 84, pl. 5, figs. 1, 2 q. UNITED KINGDOM (Isle of Wight, Eocene)
Syntermitopone Wheeler, 1936e 169 [as subgenus of Termitopone]
Syscia Roger, 1861a 19
Syscia amblyogyna Longino & Branstetter, 2021 12, figs. 12, S1-2 w.q. GUATEMALA
Syscia arcodorsa Du et al., 2024 161, figs. 1, 2, table 1 w. CHINA (Guangxi)
Syscia atitlana Longino & Branstetter, 2021 16, figs. 12, S3 w. GUATEMALA
Syscia australis Forel, 1900b 68 w. AUSTRALIA (Queensland)
Syscia australis var. edentata Forel, 1900b 69 w. AUSTRALIA (Queensland)
Syscia austrella Longino & Branstetter, 2021 20, figs. 8, S7-8 w.dq. PANAMA
Syscia benevidesae Longino & Branstetter, 2021 21, figs. 11, S9-10 w.dq. COSTA RICA
Syscia borowieci Longino & Branstetter, 2021 21, figs. 13, S11 w. HONDURAS
Syscia boudinoti Longino & Branstetter, 2021 21, figs. 8, S12-13 w.m. HONDURAS
Syscia brachyptera Longino & Branstetter, 2021 22, figs. 9, S14-15 w.q. HONDURAS