Emery, 1922c: 175 (as subgenus of Monomorium); Chapman & Capco, 1951: 162 (Asia Ireneidris); Ettershank, 1966: 100; Bolton, 1995b: 258 (as part of Monomorium); Fisher & Bolton, 2016: 418 (Afrotropical, Malagasy checklist).
Santschi, 1921c: 120 (Syllophopsis species key); Emery, 1922c: 175 (Monomorium (Syllophopsis) diagnosis); Ettershank, 1966: 100 (diagnosis, review of genus); Bolton, 1987: 307 (Afrotropical species key, as part of Monomorium); Heterick, 2006: 84 (Malagasy species key, as part of Monomorium); Sharaf & Aldawood, 2013a: 80 (Afrotropical species key); Aldawood, 2016: 137 (Saudi Arabia species and key); Fisher & Bolton, 2016: 416 (diagnosis); Cantone, 2017: 241 (brief male diagnosis); Rasoarimalala et al., 2024: 1 (linear morphometry of male genitalia); Ramamonjisoa et al., 2024: 342 (Malagasy region male diagnosis).
Extant: 22 valid species, 1 valid subspecies
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