1940  Perrinites hilli tardus Miller & Furnish: 154, pl.34 fig.3,4,6, pl.35 fig.6,7, textfig.39A,39D,39E,43A.
     1984  Paraperrinites tardus.-Tharalson: 828, fig.16B,21,22.
     2004  Perrinites tardus.-Zhou & Liengjarern: 335, fig.16.9, 16.10, 17.3, 17.4, 18.1-18.10.
     2005  Perrinites tardus.-Zhou & Yang: 386, Fig.8.1 - 8.5, 10.2, 10.3, tab.2.

Fig. see TAX3326 B (suture).