Name Authorship Pages Forms Locality Notes
Syllophopsis saudiensis Aldawood, 2016 140, figs. 2, 3 w. SAUDI ARABIA
Symbiomyrma Arnol'di, 1930c 267
Symbiomyrma karavajevi Arnol'di, 1930c 269, figs. 1-4 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
Syscia chaladthanyakiji Jaitrong et al., 2020 3, figs. 1-6, 11 w.q. THAILAND
Syscia chiapaneca Longino & Branstetter, 2021 23, figs. 11, S16-17 w.dq. MEXICO (Chiapas)
Syscia chinensis Chen, 2025 4, figs. 1, 2 w. CHINA (Yunnan)
Syscia disjuncta Longino & Branstetter, 2021 23, figs. 11, S18-20 w.q.intercaste MEXICO (Tamaulipas)
Syscia grandis Longino & Branstetter, 2021 24, figs. 13, S21 w. GUATEMALA
Syscia indica Aswaj et al., 2021 67, figs. 1, 3A-F w. INDIA (Arunachal Pradesh)
Syscia jennierussae Longino & Branstetter, 2021 25, figs. 10, S24-25 w.q.intercaste MEXICO (Chiapas)
Syscia lacandona Longino & Branstetter, 2021 26, figs. 12, S26-28 w.q.m. MEXICO (Chiapas)
Syscia latepunctata Longino & Branstetter, 2021 27, figs. 13, S29-30 w.q. COSTA RICA
Syscia machaquila Longino & Branstetter, 2021 27, figs. 10, S31-32 w.q. GUATEMALA
Syscia madrensis Longino & Branstetter, 2021 28, figs. 11, S33 w. U.S.A. (Arizona)
Syscia minuta Longino & Branstetter, 2021 28, figs. 8, S34-36 w.q.m. COSTA RICA
Syscia murillocruzae Longino & Branstetter, 2021 29, figs. 10, S37-38 w.q.eq. COSTA RICA
Syscia parietalis Longino & Branstetter, 2021 30, figs. 11, S39-41 w.q.m. HONDURAS
Syscia parva Longino & Branstetter, 2021 31, figs. 8, S42-43 w.q. NICARAGUA
Syscia persimilis Longino & Branstetter, 2021 31, figs. 10, S44-46 w.q.intercaste NICARAGUA
Syscia pervagata Longino & Branstetter, 2021 32, figs. 9, S47-50 w.q.intercaste.m. HONDURAS
Syscia peten Longino & Branstetter, 2021 34, figs. 9, S51-52 w.q. GUATEMALA
Syscia pollula Longino & Branstetter, 2021 34, figs. 8, S53-55 w.q. NICARAGUA
Syscia quisquilis Longino & Branstetter, 2021 35, figs. 8, 9, S56-57 w. U.S.A. (California)
Syscia reticularis Jaitrong et al., 2020 6, figs. 7-10, 11 w. THAILAND
Syscia sabahna Yamane & Mizuno, 2024 5, figs. 2, 3 w.dq. BORNEO (East Malaysia: Sabah)
Syscia setosa Longino & Branstetter, 2021 35, figs. 11, S58-61 w.q.intercaste.m. MEXICO (Veracruz)
Syscia sumnichti Longino & Branstetter, 2021 36, figs. 9, S62 w. GUATEMALA
Syscia ticomontana Longino & Branstetter, 2021 36, figs. 12, S63 w. COSTA RICA
Syscia transisthmica Longino & Branstetter, 2021 38, figs. 12, S66-67 w.q. MEXICO (Oaxaca)