In synonymy:
Hormathion Crosby & Bishop, 1933 = Thyreosthenius Simon, 1884 (Hackman, 1952b: 73)
Transferred to other genera:
Thyreosthenius asiaticus Andreeva & Tystshenko, 1970 -- see Styloctetor
In synonymy:
Thyreosthenius becki (O. Pickard-Cambridge, 1871, removed from S of Lophocarenum turgidum per Roewer) = Thyreosthenius parasiticus Westring, 1851 (Holm, 1945b: 20)
Thyreosthenius buddebergi (Bösenberg, 1899, T from Diplocephalus) = Thyreosthenius biovatus O. Pickard-Cambridge, 1875 (Wunderlich, 1974b: 165)
Thyreosthenius limnatus (Crosby & Bishop, 1933) = Thyreosthenius parasiticus Westring, 1851 (Hackman, 1952b: 73)
Thyreosthenius sulcatus (Simon, 1926, T from Troxochrus) = Thyreosthenius parasiticus Westring, 1851 (Millidge, 1977: 56)
Thyreosthenius synophrys (Thorell, 1870, removed from S of Lophocarenum turgidum) = Thyreosthenius parasiticus Westring, 1851 (Holm, 1945b: 20)