In synonymy:
Isopus Taczanowski, 1872 = Tapinillus Simon, 1898 (Simon, 1898a: 379, preoccupied, replacement name)
Transferred to other genera:
Tapinillus argentinus Mello-Leitão, 1941 -- see Peucetia
In synonymy:
Tapinillus caldensis (Garcia-Neto, 1989) = Tapinillus longipes (Taczanowski, 1872) (Martínez-Torres & Galvis, 2018: 106)