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: Otomorpha
Subcohors: Ostariophysi
Sectio: Otophysa
Ordo: Characiformes
Familia: Characidae
Subfamiliae: Pristellinae
Genus: Petitella
Species (3): P. bleheri – P. georgiae – P. rhodostoma
Name
Petitella Géry & Boutière, 1964
Type species: Petitella georgiae Géry & Boutière, 1964.
Etymology: –ella, diminutive connoting endearment: in honor of zoologist-anatomist Georges Petit (1892-1973), Directeur du Laboratoire Arago. [1]
References
Primary references
Géry, J. & Boutière, H. 1964. Petitella georgiae gen. et sp. nov. (Pisces, Cypriniformes, Characoidei). Vie et Milieu Suppl. No. 17: 473–484. [Full issue PDF]. Reference page.
Petitella is a genus of freshwater fish in the family Characidae of the order Characiformes.
They are all popular tropical fish in the aquarium hobby. They are commonly known as Rummy-nose tetras.
Taxonomy and systematics
This genus was formerly monotypic, featuring only P. georgiae. The other two species were allocated to Hemigrammus. Before the reallocation in 2020,[1][2] they were distinguished by the following common names:
P. bleheri - Brilliant rummy-nose tetra, or Firehead tetra
P. georgiae - False rummy-nose tetra
P. rhodostoma - Rummy-nose tetra
Species
There are three recognized species in this genus:[3]
Petitella bleheri (Géry & Mahnert, 1986)
Petitella georgiae Géry & Boutière, 1964
Petitella rhodostoma (Ahl, 1924)
References
Jeremy Gay (14 July 2020). "Rummynose tetras combine into a single genus". Fishkeeping News. Retrieved 28 December 2023.
"Phylogenetic relationships of the neon tetras Paracheirodon spp. (Characiformes: Characidae: Stethaprioninae), including comments on Petitella georgiae and Hemigrammus bleheri". Neotropical Ichthyology. doi:10.1590/1982-0224-2019-0109.
Bailly, Nicolas (2014). "Petitella Géry & Boutière, 1964". WoRMS. World Register of Marine Species. Retrieved 28 December 2023.
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