''Adrianichthys'' 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 ...

ricefish The ricefishes are a family (biology), family (Adrianichthyidae) of small ray-finned fish that are found in fresh and brackish waters from India to Japan and out into the Malay Archipelago, most notably Sulawesi (where the Lake Poso and Lore Lin ...

es. The genus is

endemic Endemism is the state of a species being found only in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also foun ...

Lake Poso Lake Poso () is a lake in Central Sulawesi, Indonesia, and the third-deepest lake in Indonesia. The town of Pendolo is situated at the southern end of the lake, the town of Tentena is located at the northern end, while a number of smaller v ...

Sulawesi Sulawesi ( ), also known as Celebes ( ), is an island in Indonesia. One of the four Greater Sunda Islands, and the List of islands by area, world's 11th-largest island, it is situated east of Borneo, west of the Maluku Islands, and south of Min ...

Indonesia Indonesia, officially the Republic of Indonesia, is a country in Southeast Asia and Oceania, between the Indian Ocean, Indian and Pacific Ocean, Pacific oceans. Comprising over List of islands of Indonesia, 17,000 islands, including Sumatra, ...

. All four species are considered seriously threatened and two of these, ''A. kruyti'' and ''A. roseni'', have not been recorded for decades, leading to fears that they already are extinct.Parenti, L.R. (2011)
Endemism and Conservation of the Native Freshwater Fish Fauna of Sulawesi, Indonesia
Prosiding Seminar Nasional Ikan IV: 1-10. ''Adrianichthys'' are larger than the ''

Oryzias ''Oryzias'' is a genus of ricefishes native to fresh and brackish water in east and south Asia. Some species are widespread and the Japanese rice fish (''O. latipes'') is commonly used in science as a model organism, while others have very small ...

'' ricefish, reaching lengths of depending on the exact species involved. The name of this genus is a compound ending in the

Greek Greek may refer to: Anything of, from, or related to Greece, a country in Southern Europe: *Greeks, an ethnic group *Greek language, a branch of the Indo-European language family **Proto-Greek language, the assumed last common ancestor of all kno ...

''ichthys'' for "fish" with the first part honouring the

linguist Linguistics is the scientific study of language. The areas of linguistic analysis are syntax (rules governing the structure of sentences), semantics (meaning), Morphology (linguistics), morphology (structure of words), phonetics (speech sounds ...

and

missionary A missionary is a member of a Religious denomination, religious group who is sent into an area in order to promote its faith or provide services to people, such as education, literacy, social justice, health care, and economic development.Thoma ...

Nicolaus Adriani (1865-1926), who collected specimens around Lake Poso.

Species

There are currently four recognized species in this genus: * ''

Adrianichthys kruyti ''Adrianichthys kruyti'' (the duck-billed buntingi or duckbilled buntingi) is a critically endangered species of ricefish that is endemic to Lake Poso, Sulawesi, Indonesia.Harrison, Ian J. and Melanie L. J. Stiassny (1999). "The Quiet Crisis," P ...

'' M. C. W. Weber, 1913 (Duckbilled buntingi) * ''

Adrianichthys oophorus The egg-carrying buntingi (''Adrianichthys oophorus'') is a species of fish in the family Adrianichthyidae. It is endemic to Lake Poso in Sulawesi, Indonesia Indonesia, officially the Republic of Indonesia, is a country in Southeast Asi ...

'' ( Kottelat, 1990) (Eggcarrying buntingi) * ''

Adrianichthys poptae Popta's buntingi (''Adrianichthys poptae'') is an endangered species of fish in the family Adrianichthyidae. It is endemic to Lake Poso in Sulawesi, Indonesia. Etymology This species was described by Max Carl Wilhelm Weber and Lieven Ferdinan ...

'' ( M. C. W. Weber & de Beaufort, 1922) (Popta's buntingi) * ''

Adrianichthys roseni ''Adrianichthys roseni'' is a species of ricefish, a member of the family Adrianichthyidae which is endemic to Lake Poso on Sulawesi. Since the holotype was collected in 1978 there have been no reports of this species and if it still exists then ...

'' Parenti & Soeroto, 2004

References

Adrianichthyidae Taxa named by Max Carl Wilhelm Weber Freshwater fish of Sulawesi {{Beloniformes-stub