An integrative study of Callicarpa gracilis Fewkes, 1881 and Aglaophenia trifida L. Agassiz, 1862, with notes on some hydroids (Cnidaria: Hydrozoa) from French Guiana Galea, Horia R. Di Camillo, Cristina G. Maggioni, Davide Zootaxa 2021 2021-02-09 4926 3 301 341 6224W Owen, 1834 Owen 1834 [225,503,1806,1833] Hydrozoa Animalia 2 303 Cnidaria class  5 “As described by Nutting (1900:75), those of  Hippurella annulata, typespecies of  Hippurella,are axillary and by inference unprotected (in being assigned to  Antennopsis),while those of  H. longicarpa, typespecies of  Antomma,are protected by phylactocarps at the ends of the branches.»