the world > animals > invertebrates > subkingdom Metazoa > grade Diploblastica > phylum Coelenterata > [adjective] > of class Hydrozoa > relating to siphonophores > related to genus Velella
velellidousa1836
a1836 Encycl. Metrop. (1845) VII. 268/1 The Velellidous Acalephs have within their soft substance a cartilaginous or calcareous plate or disc.