Aeginidae is a family

Family (biology)

In biological classification, family is* a taxonomic rank. Other well-known ranks are life, domain, kingdom, phylum, class, order, genus, and species, with family fitting between order and genus. As for the other well-known ranks, there is the option of an immediately lower rank, indicated by the...

 of jellyfish

Jellyfish

Jellyfish are free-swimming members of the phylum Cnidaria. Medusa is another word for jellyfish, and refers to any free-swimming jellyfish stages in the phylum Cnidaria...

 in the order Narcomedusae

Narcomedusae

Narcomedusae is an order of hydrozoans in the subclass Trachylinae.-Characteristics:Members of this order do not normally have a polyp stage. The medusa has a dome-shaped bell with thin sides. The tentacles are attached above the lobed margin of the bell with usually a gastric pouch above each....

. Most of the genera include only a single species.

Characteristics

Jellyfish with dome-shaped bells and tentacles set above the undulating margin of the bell. There are gastric pouches containing the gonads situated between the tentacles, the number of pouches being greater than the number of tentacles. The pouches extend below the points of origin of the primary tentacles. Some genera have a peripheral canal system and others do not, and some have secondary tentacles.

Genera and species

The World Register of Marine Species lists the following genera

Genus

In biology, a genus is a low-level taxonomic rank used in the biological classification of living and fossil organisms, which is an example of definition by genus and differentia...

 and species

Species

In biology, a species is one of the basic units of biological classification and a taxonomic rank. A species is often defined as a group of organisms capable of interbreeding and producing fertile offspring. While in many cases this definition is adequate, more precise or differing measures are...

:

• Aegina Eschscholtz, 1829
  • Aegina citrea Eschscholtz, 1829
• Aeginodiscus Haeckel, 1879
  • Aeginodiscus actinodiscus Haeckel, 1879
• Aeginopsis Brandt, 1835
  • Aeginopsis laurentii Brandt, 1838
• Aeginura Haeckel, 1879
  • Aeginura beebei Bigelow, 1940
  • Aeginura grimaldii Maas, 1904
• Bathykorus Raskoff, 2010
  • Bathykorus bouilloni
    Bathykorus bouilloni
    Bathykorus bouilloni is a species of jellyfish that was first described in 2010. It is a deep sea species found in the Arctic Ocean and seems to be common below about . It is the only species in its genus, Bathykorus...
    
    Raskoff, 2010
• Jubanyella Fuentes & Pages, 2006
  • Jubanyella plemmyris Fuentes & Pages, 2006
• Otoporpa Xu & Zhang, 1978
  • Otoporpa polystriata Hsu & Chang, 1978
• Solmundella
  • Solmundella bitentaculata
    Solmundella bitentaculata
    Solmundella bitentaculata is a species of narcomedusa jellyfish in the family Aeginidae.-Distribution:This species is found in:* Ross Sea, Antarctica.* European waters * Gulf of Mexico * Kenya * New Zealand * North West Atlantic...
    
    (Quoy & Gaimard, 1833)
• Tetraotoporpae Zamponi & Suarez Morales, 1991
  • Tetraotoporpae siankaanensis Zamponi & Suarez Morales, 1991