Reprezentanții Cnidaria au fost un timp lung grupați împreună cu Ctenophorele în încrengătura(?) Coelenterata, dar apoi au fost plasate în propria încrengătură.
^Borchiellini, C., Manuel, M., Alivon, E., Boury-Esnault, N., Vacelet J., and Le Parco, Y. (). „Sponge paraphyly and the origin of Metazoa”. Journal of Evolutionary Biology. 14 (1): 171–179. doi:10.1046/j.1420-9101.2001.00244.x.Mentenanță CS1: Nume multiple: lista autorilor (link)
^Wallberg, A., Thollesson, M., , Farris, J.S., and Jondelius, U. (). „The phylogenetic position of the comb jellies (Ctenophora) and the importance of taxonomic sampling”. Cladistics. 20 (6): 558–578. doi:10.1111/j.1096-0031.2004.00041.x.Mentenanță CS1: Nume multiple: lista autorilor (link)
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Articole de reviste
D. Bridge, B. Schierwater, C. W. Cunningham, R. DeSalle R, L. W. Buss: Mitochondrial DNA structure and the molecular phylogeny of recent cnidaria classes. in: Proceedings of the Academy of Natural Sciences of Philadelphia. Philadelphia USA 89.1992, p. 8750. ISSN0097-3157
D. Bridge, C. W. Cunningham, R. DeSalle, L. W. Buss: Class-level relationships in the phylum Cnidaria—Molecular and morphological evidence. in: Molecular biology and evolution. Oxford University Press, Oxford 12.1995, p. 679. ISSN0737-4038
P. Schuchert: Phylogenetic analysis of the Cnidaria. in: Zeitschrift für zoologische Systematik und Evolutionsforschung. Paray, Hamburg-Berlin 31.1993, p. 161. ISSN0044-3808