Published online by Cambridge University Press: 31 May 2012
Eight species of Thanatus are recognized in North America; four are holarctic in range and four nearctic. The holarctic species are T. coloradensis Keyserling, 1880, T. formicinus (Clerck 1757), T. striatus C. L. Koch, 1845, and T. vulgaris Simon, 1870 (=T. peninsulanus Banks, 1898, NEW SYNONYMY). The four nearctic species are T. altimontis Gertsch, 1933, T. arcticus Thorell, 1872, T. patriciae (Lowrie and Gertsch 1955), and T. rubicellus Mello-Leitao, 1929 (=T. rowani Gertsch, 1933, NEW SYNONYMY).