Oryzias

Oryzias is a genus of ricefishes native to fresh and brackish water in east and south Asia.^[4] 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 ranges and are threatened.^[4] They are small, up to 8 cm (3.1 in) long, and most are relatively plain in colour.^[5]

Oryzias
Japanese rice fish (O. latipes)
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Actinopterygii
Order:	Beloniformes
Family:	Adrianichthyidae
Subfamily:	Oryziinae Myers,1938[1]
Genus:	Oryzias D. S. Jordan & Snyder, 1906
Type species
Poecila latipes (Temminck & Schlegel, 1846)[2]
Synonyms[3]
Horaichthys Kulkarni, 1940 Xenopoecilus Regan, 1911

The genus name Oryzias is a reference to the scientific name for rice, Oryza.^[4]

They have an unusual reproductive behavior where the female facultatively (optionally) carries the eggs in a cluster at the pelvic or anal fins for a period after they have been fertilized.^[4][6]

Species

Oryzias mekongensis

Oryzias nigrimas

Oryzias sarasinorum

Oryzias woworae

There are currently 33 recognized species in this genus:^[5]

• Oryzias asinua Parenti, Hadiaty, Lumbantobing & Herder, 2013^[7]
• Oryzias bonneorum Parenti, 2008^[4]
• Oryzias carnaticus Jerdon, 1849
• Oryzias celebensis M. C. W. Weber, 1894 (Celebes medaka)
• Oryzias curvinotus Nichols & C. H. Pope, 1927
• Oryzias dancena F. Hamilton, 1822
• Oryzias eversi Herder, Hadiaty & Nolte, 2012^[6]
• Oryzias hadiatyae Herder & Chapuis, 2010 (Renny's ricefish)^[8]
• Oryzias haugiangensis T. R. Roberts, 1998
• Oryzias hubbsi T. R. Roberts, 1998
• Oryzias javanicus Bleeker, 1854 (Javanese ricefish)
• Oryzias latipes Temminck & Schlegel, 1846 (Japanese ricefish)
• Oryzias luzonensis Herre & Ablan, 1934
• Oryzias marmoratus Aurich, 1935 (Marmorated medaka)
• Oryzias matanensis Aurich, 1935 (Matano medaka)
• Oryzias mekongensis Uwa & Magtoon, 1986^[9]
• Oryzias melastigma McClelland, 1839
• Oryzias minutillus H. M. Smith, 1945 (Dwarf medaka)
• Oryzias nebulosus Parenti & Soeroto, 2004^[10]
• Oryzias nigrimas Kottelat, 1990 (black buntingi)
• Oryzias orthognathus Kottelat, 1990 (Sharp-jawed buntingi)
• Oryzias pectoralis T. R. Roberts, 1998
• Oryzias profundicola Kottelat, 1990 (Yellow finned medaka)
• Oryzias sakaizumii T. Asai, Senou & K. Hosoya, 2012 (Northern medaka)
• Oryzias sarasinorum Popta, 1905 (Sarasins minnow)
• Oryzias setnai Kulkarni, 1940 (Malabar ricefish)
• Oryzias sinensis Y. R. Chen, Uwa & X. L. Chu, 1989
• Oryzias soerotoi D. F. Mokodongan, Tanaka & Yamahira, 2014^[11]
• Oryzias songkhramensis Magtoon, 2010
• Oryzias timorensis M. C. W. Weber & de Beaufort, 1922
• Oryzias uwai T. R. Roberts, 1998
• Oryzias wolasi Parenti, Hadiaty, Lumbantobing & Herder, 2013^[7]
• Oryzias woworae Parenti & Hadiaty, 2010
• Oryzias dopingdopingensis Ixchel F. Mandagi, Daniel Frikli Mokodongan, Tanaka & Yamahira, 2018^[12]

References

1. Richard van der Laan; William N. Eschmeyer & Ronald Fricke (2014). "Family-group names of Recent fishes". Zootaxa. 3882 (2): 001–230.
2. Eschmeyer, William N.; Fricke, Ron & van der Laan, Richard (eds.). "Oryzias". Catalog of Fishes. California Academy of Sciences. Retrieved 26 July 2019.
3. Eschmeyer, William N.; Fricke, Ron & van der Laan, Richard (eds.). "Genera in the family Addrianichthyidae". Catalog of Fishes. California Academy of Sciences. Retrieved 26 July 2019.
4. Parenti, L.R. (2008). "A phylogenetic analysis and taxonomic revision of ricefishes, Oryzias and relatives (Beloniformes, Adrianichthyidae)". Zoological Journal of the Linnean Society. 154: 494–610. doi:10.1111/j.1096-3642.2008.00417.x.
5. Froese, Rainer; Pauly, Daniel (eds.). "Species in genus Oryzias". FishBase. February 2017 version.
6. Herder, F.; Hadiaty, R. K.; Nolte, A. W. (2012). "Pelvic-fin brooding in a new species of riverine ricefish (Atherinomorpha: Beloniformes: Adrianichthyidae) from Tana Toraja, Central Sulawesi, Indonesia". The Raffles Bulletin of Zoology. 60 (2): 467–476.
7. Parenti, L.R.; Hadiaty, R.K.; Lumbantobing, D.; Herder, F. (2013). "Two New Ricefishes of the Genus Oryzias (Atherinomorpha: Beloniformes: Adrianichthyidae) Augment the Endemic Freshwater Fish Fauna of Southeastern Sulawesi, Indonesia". Copeia. 2013 (3): 403–414. doi:10.1643/ci-12-114.
8. Herder, F. & Chapuis, S. (2010). "Oryzias hadiatyae, a new species of ricefish (Atherinomorpha: Beloniformes: Adrianichthyidae) endemic to Lake Masapi, Central Sulawesi, Indonesia" (PDF). The Raffles Bulletin of Zoology. 58: 269–280.
9. Uwa, H. & Magtoon, W. (1986). "Description and karyotype of a new ricefish, Oryzias mekongensis, from Thailand". Copeia. 51: 473–478. doi:10.2307/1445005. JSTOR 1445005.
10. Parenti, L. R. & B. Soeroto. (2004). "Adrianichthys roseni and Oryzias nebulosus, two new ricefishes (Atherinomorpha: Beloniformes: Adrianichthyidae) from Lake Poso, Sulawesi, Indonesia". Ichthyological Research. 51: 10–19. doi:10.1007/s10228-003-0187-1.
11. Mokodongan, D.F.; Tanaka, R.; Yamahira, K. (2014). "A New Ricefish of the Genus Oryzias (Beloniformes, Adrianichthyidae) from Lake Tiu, Central Sulawesi, Indonesia". Copeia. 2014 (3): 561–567. doi:10.1643/ci-13-081.
12. Mandagi, I.F.; Mokodongan, D.F.; Tanaka, R.; Yamahira, K. (2018). "A New Riverine Ricefish of the Genus Oryzias (Beloniformes, Adrianichthyidae) from Malili, Central Sulawesi, Indonesia". Copeia. 2018 (106): 297–304. doi:10.1643/CI-17-704.