''Sundadanio axelrodi'' is a

danionin The danionins are a group of small, minnow-type fish belonging to the family Cyprinidae. Members of this group are mostly in the genera ''Danio'', '' Devario'', and ''Rasbora''. They are primarily native to the fresh waters of South and Southeast ...

in the family

Cyprinidae Cyprinidae is a family of freshwater fish commonly called the carp or minnow family. It includes the carps, the true minnows, and relatives like the barbs and barbels. Cyprinidae is the largest and most diverse fish family and the largest v ...

, with origin from Borneo, Bangka, and Sumatra. Originally described as a

rasbora ''Rasbora'' is a genus of fish in the family Cyprinidae. They are native to freshwater habitats in South and specimen that reputedly originated from Africa (Cameroon), but this locality is considered doubtful. They are small, up to long, altho ...

, ''Rasbora axelrodi'', this tiny species was later deemed to be more closely related to the danios but not enough to be moved into the genus ''

Danio ''Danio'' is a genus of small freshwater fish in the family Cyprinidae found in South and Southeast Asia, commonly kept in aquaria. They are generally characterised by a pattern of horizontal stripes, rows of spots or vertical bars. Some species ...

''. ''Sundadanio axelrodi'' reaches a maximum size of 1.7 cm. ''Sundadanio'' was considered

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 ...

until the genus was reassessed by Conway, Kottelat and Tan in 2011.Conway, K.W., Kottelat, M. & Tan, H.H. (2011): ''Review of the Southeast Asian miniature cyprinid genus'' Sundadanio ''(Ostariophysi: Cyprinidae) with descriptions of seven new species from Indonesia and Malaysia.'' Ichthyological Exploration of Freshwaters, 22 (3): 251-288.

Etymology

Named in honor of pet-book publisher

Herbert R. Axelrod Herbert Richard Axelrod (June 7, 1927 – May 15, 2017) was an American tropical fish expert, a publisher of pet books, and an entrepreneur. In 2005 he was sentenced in U.S. court to 18 months in prison for tax fraud. Early life Axelrod was born ...

(b. 1927), who discovered this species in the tanks of a

Singapore Singapore (), officially the Republic of Singapore, is a sovereign island country and city-state in maritime Southeast Asia. It lies about one degree of latitude () north of the equator, off the southern tip of the Malay Peninsula, borde ...

aquarium fish exporter.

References

''Sundadanio axelrodi'' at danios.info
* {{Taxonbar, from=Q168709 Sundadanio Taxa named by Martin Ralph Brittan Freshwater fish of Indonesia Fish described in 1976