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Superregnum: Eukaryota
Cladus: Unikonta
Cladus: Opisthokonta
Cladus: Holozoa
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Superphylum: Deuterostomia
Phylum: Chordata
Subphylum: Vertebrata
Infraphylum: Gnathostomata
Megaclassis: Osteichthyes
Superclassis/Classis: Actinopterygii
Classis/Subclassis: Actinopteri
Subclassis/Infraclassis: Neopterygii
Infraclassis: Teleostei
Megacohors: Osteoglossocephalai
Supercohors: Clupeocephala
Cohors: Euteleosteomorpha
Subcohors: Neoteleostei
Infracohors: Eurypterygia
Sectio: Ctenosquamata
Subsectio: Acanthomorphata
Divisio/Superordo: Acanthopterygii
Subdivisio: Percomorphaceae
Series: Eupercaria
Ordo: Perciformes
Subordo: Labroidei

Familia: Scaridae
Genus: Nicholsina
Species: N. denticulata – N. usta

Nicholsina Fowler, 1915:3

Type species: Cryptotomus beryllinus Jordan & Swain, 1884. Type by original designation.

Fowler, H.W. 1915: The genus Cryptotomus Cope. Copeia, 14: 3.
Streelman, J.T., M. Alfaro, M.W. Westneat, D.R. Bellwood, & S.A. Karl 2002: Evolutionary history of the parrotfishes: biogeography, ecomorphology, and comparative diversity. Ecology, 56 (5): 961–971. PDF

Vernacular names
English: Parrotfishes

Nicholsina is a genus of marine ray-finned fishes, parrotfishes from the family Scaridae. They are found in the Atlantic and eastern Pacific Oceans. The generic name honours the American ichthyologist John Treadwell Nichols (1883-1958) who was curator of fishes at the American Museum of Natural History.[2]

There are currently three species classified in the genus:[2]

Nicholsina collettei Schultz 1968
Nicholsina denticulata (Evermann & Radcliffe, 1917) (Loosetooth parrotfish)
Nicholsina usta (Valenciennes, 1840) (Emerald parrotfish)


Eschmeyer, William N.; Fricke, Ron & van der Laan, Richard (eds.). "Nicholsina". Catalog of Fishes. California Academy of Sciences. Retrieved 16 February 2020.
Froese, Rainer and Pauly, Daniel, eds. (2019). Species of Nicholsina in FishBase. December 2019 version.

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