Pugh, P. R., & Baxter, E. J. (2014).

A review of the physonect siphonophore genera Halistemma (Family Agalmatidae) and Stephanomia (Family Stephanomiidae)

. Zootaxa, 3897(1), 1–111. https://doi.org/10.11646/zootaxa.3897.1.1