Silcox, M., et al. "Virtual endocast of Ignacius graybullianus (Paromomyidae, Primates) and brain evolution in early primates." PNAS (July 7, 2009).
- Skull & brain endocast (Courtesy of Mary Silcox/Univ. of Winnipeg)
- Skull of Ignacius graybullianus and University of Florida paleontologist Jonathan Bloch (Eric Zamora/Univ. of Florida)