World Register of Marine Species (WoRMS)
Jersabek, C. D.; Segers H.; Leitner M. (2026). Rotifer World Catalog (RWC). Callidina pigra Gosse, 1887. Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=1797758 on 2026-08-01
Gosse, P. H. (1887). Twenty-four new species of Rotifera. Journal of the Royal Microscopical Society, 7, 1-7, pl.1-2