First full description of the large physonect siphonophore Halistemma amphytridis (Lesueur & Petit, 1807) - Mapstone, G. M. (Hydrobiologia, 2004)
The physonect siphonophore Halistemma amphytridis (Lesueur & Petit, 1807), previously known as Stephanomia amphytridis, was originally described in part from siphosomal material only. This paper demonstrates that the siphosome of a large mature Halistemma