''Stomolophus'' is a genus of

true jellyfish The Scyphozoa are an exclusively marine class of the phylum Cnidaria, referred to as the true jellyfish (or "true jellies"). The class name Scyphozoa comes from the Greek word ''skyphos'' (), denoting a kind of drinking cup and alluding to the ...

from the West Atlantic and Pacific. It is the only genus in the

monotypic In biology, a monotypic taxon is a taxonomic group (taxon) that contains only one immediately subordinate taxon. A monotypic species is one that does not include subspecies or smaller, infraspecific taxa. In the case of genera, the term "unisp ...

family Stomolophidae. Formerly,

Nomura's jellyfish is a very large rhizostome jellyfish, in the same size class as the lion's mane jellyfish, the largest cnidarian in the world. It is edible but not considered high quality. It is the only species in the monotypic genus ''Nemopilema.'' Commonl ...

(''Nemopilema nomurai'') was also included in this genus, but has now been reclassified to the family

Rhizostomatidae Rhizostomatidae is a family of cnidarians in the class Scyphozoa. Genera and species According to the World Register of Marine Species, 11 extant species are in four extant genera within this family: *Genus ''Eupilema'' **'' Eupilema inexpectat ...

Species

According to the ''

World Register of Marine Species The World Register of Marine Species (WoRMS) is a taxonomic database that aims to provide an authoritative and comprehensive catalogue and list of names of marine organisms. Content The content of the registry is edited and maintained by scien ...

'', ''Stomolophus'' includes two species: *'' Stomolophus fritillarius'' *'' Stomolophus meleagris'' – the cannonball or cabbagehead jellyfish

References

Daktyliophorae Scyphozoan genera Taxa named by Louis Agassiz Taxa described in 1862 {{Scyphozoa-stub