Isurus retroflexus (AGASSIZ, 1843) and/or
    I. paucus GUITART MANDAY, 1966

For particulars on this species, see the Lee Creek pages.

Fig. 1 - Isurus retroflexus
Lower tooth, slant height 30 mm
Sharktooth Hill specimen

Isurus desori (SISMONDA, 1849) and/or
    I. oxyrinchus RAFINESQUE, 1809

Fig. 2 & 3 - Isurus oxyrinchus
Lower Anterior and Lateral
Sharktooth Hill specimen