Olson, Storrs L., and Hiroshige Matsuoka. 2005. “New Specimens of the Early Eocene Frigatebird Limnofregata (Pelecaniformes: Fregatidae), With the Description of a New Species”. Zootaxa 1046 (1). Auckland, New Zealand:1–15. https://doi.org/10.11646/zootaxa.1046.1.1.