EntityQ4009419· pop 5· linked from 3 articlesHalopterisSign in to savegenus of cnidariansTaxonomy · iNaturalistspeciesObservations600GroupchromistaiNaturalist · CC0ConnectionsAnimaliaEntityWikidataEntitytaxonomyEntityCnidariaEntityHydrozoaEntityNational Center for Biotechnology InformationEntityIntegrated Taxonomic Information SystemEntityGlobal Biodiversity Information FacilityEntitycosmopolitan distributionEntityWorld Register of Marine SpeciesEntityiNaturalistEntityCatalogue of LifeEntityGeorge James AllmanEntityBarcode of Life Data SystemsEntityInterim Register of Marine and Nonmarine GeneraEntityLeptothecataEntityOpen Tree of LifeEntityAustralian Faunal DirectoryEntityPlaziEntityHalopterididaeEntityCategoriesHalopterididaeHydrozoan generaTaxa described in 1877Taxa named by George Allman (natural historian)