Hydromedusae observed during night dives in the Gulf Stream Author Schuchert, Peter Muséum d’histoire naturelle, C. P. 6434, CH- 1211 Genève 6, Switzerland peter.schuchert@ville-ge.ch Author Collins, Richard 880 NE 33 rd Street, Boca Raton, Florida, USA rc6684@icloud.com text Revue suisse de Zoologie 2021 2021-10-21 128 2 237 356 journal article 10.35929/RSZ.0049 172fa5c5-c0c4-4bd7-b710-d608237b8458 0035-418 5639938 Order Narcomedusae Remarks: The families of the Narcomedusae have recently been reorganized by Lindsay et al. (2017) using DNA data. Bentlage et al . (2018) added more sequences. The 16S sequences of these studies and the ones from the present study were combined to get a maximum likelihood tree ( Fig. 48 ). Although 16S has low resolving power above the genus level, some well supported nodes indicate that the Cuninidae and Solmarisidae are polyphyletic as already found by Bentlage et al. (2018) . As revision of the families is beyond the scope of this study, we here used the family level taxonomy of Bouillon et al. (2006) and Lindsay et al. (2017) , except for the genus Otoporpa .