''Atolla'' is a genus of

crown jellyfish Crown jellyfishes are the six families of true jellyfish that belong to the order Coronatae.Daly, Brugler, Cartwright, Collins, Dawson, Fautin, France, McFadden, Opresko, Rodriguez, Romano & Stake (2007). The phylum Cnidaria: A review of phylog ...

in the

order Order, ORDER or Orders may refer to: * Categorization, the process in which ideas and objects are recognized, differentiated, and understood * Heterarchy, a system of organization wherein the elements have the potential to be ranked a number of d ...

Coronatae. The genus ''Atolla'' was originally proposed by

Haeckel Ernst Heinrich Philipp August Haeckel (; 16 February 1834 – 9 August 1919) was a German zoologist, naturalist, eugenicist, philosopher, physician, professor, marine biologist and artist. He discovered, described and named thousands of new sp ...

in 1880 and elevated to 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 "unispec ...

family level, as Atollidae by Henry Bigelow in 1913. The six known species inhabit the

mesopelagic The mesopelagic zone (Greek μέσον, middle), also known as the middle pelagic or twilight zone, is the part of the pelagic zone that lies between the photic epipelagic and the aphotic bathypelagic zones. It is defined by light, and begins ...

zone. The

medusae Jellyfish and sea jellies are the informal common names given to the medusa-phase of certain gelatinous members of the subphylum Medusozoa, a major part of the phylum Cnidaria. Jellyfish are mainly free-swimming marine animals with umbrella- ...

possess multiple lobes called lappets at the bell margin. Medusae also have eight

tentacle In zoology, a tentacle is a flexible, mobile, and elongated organ present in some species of animals, most of them invertebrates. In animal anatomy, tentacles usually occur in one or more pairs. Anatomically, the tentacles of animals work main ...

s, alternating with eight

rhopalia Rhopalia (singular: rhopalium) are small sensory structures of certain Scyphozoan (true jellyfish) and Cubozoan (box jellyfish) species. Description The structures typically occur in multiples of four, are bell shaped and face outward from invagi ...

, and twice as many lappets occur as tentacles.

Species

*'' Atolla chuni'' Vanhöffen, 1902 *'' Atolla gigantea'' Maas, 1897 *'' Atolla parva'' Russell, 1958 *'' Atolla reynoldsi'' Matsumoto et al., 2022 *'' Atolla russeli'' Repelin, 1962 *'' Atolla tenella'' Hartlaub, 1909 *'' Atolla vanhoeffeni'' Russell, 1957 *'' Atolla wyvillei'' Haeckel, 1880

References

External links

Video of ''Atolla reynoldsi'' swimming
by

Monterey Bay Aquarium Research Institute The Monterey Bay Aquarium Research Institute (MBARI) is a private, non-profit oceanographic research center in Moss Landing, California. MBARI was founded in 1987 by David Packard, and is primarily funded by the David and Lucile Packard Foundation ...

, 2022 croll down Atollidae Scyphozoan genera Bioluminescent cnidarians Taxa named by Ernst Haeckel {{Scyphozoa-stub