''Ijimaia'' is a

genus Genus (; : genera ) is a taxonomic rank above species and below family (taxonomy), family as used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In bino ...

of jellynose fishes, one of four in the order

Ateleopodiformes The jellynose fishes or tadpole fishes are the small order Ateleopodiformes. This group of ray-finned fish is monotypic, containing a single family Ateleopodidae. It has about a dozen species in four genera, but these enigmatic fishes are in nee ...

. The genus occurs in the fossil record since the

Middle Miocene The Middle Miocene is a sub-epoch of the Miocene epoch (geology), epoch made up of two Stage (stratigraphy), stages: the Langhian and Serravallian stages. The Middle Miocene is preceded by the Early Miocene. The sub-epoch lasted from 15.97 ± 0. ...

.Brzobohatý, Rostislav, and Dirk Nolf. "Revision of the middle Badenian fish otoliths from the Carpathian Foredeep in Moravia (middle Miocene, Czech Republic)." ''Cybium'' 42.2 (2018): 143–16

/ref>

Species

The currently recognized

species A species () is often defined as the largest group of organisms in which any two individuals of the appropriate sexes or mating types can produce fertile offspring, typically by sexual reproduction. It is the basic unit of Taxonomy (biology), ...

in this genus are: * '' Ijimaia antillarum'' Howell-Rivero, 1935 * '' Ijimaia dofleini'' , 1905 * '' Ijimaia fowleri'' Howell-Rivero, 1935 * '' Ijimaia loppei'' Roule, 1922 (Loppe's tadpole fish) * '' Ijimaia plicatellus'' ( C. H. Gilbert, 1905) (deepwater ateleopodid)

References

Ateleopodiformes Ray-finned fish genera {{Ateleopodiformes-stub