1. Ahlrichs, W.H. 1995. Ultrastructur und Phylogenik von Seison nebaliae (Grube, 1859) und Seison annulatus (Grube, 1876). Cuvillier Verlag, Göttingen. 310 pp.
2. Ahlrichs, W.H. 1997. Epidermal ultrastructure of Seison nebaliae and Seison annulatus, and a comparison of epidermal structures within Gnathifera. Zoomorphology 117: 41–48.
3. Ahlstrom, E.H. 1940. A revision of the Rotatorian genera Brachionus and Platyias with descriptions of one new species and two new varieties. Bulletin of the American Museum of Natural History 77: 148–184.
4. Ahlstrom, E.H. 1943. A revision of the rotatorian genus Keratella, with descriptions of three new species and five new varieties. Bulletin of the American Museum of Natural History 80: 411–457.
5. Bateman, L.E. 1987. A bdelloid rotifer living as an inquiline in leaves of the pitcher plant, Sarracenia purpurea. Hydrobiologia 147: 129–133.