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Characidae
Temporal range: Upper Miocene – Recent
Megalamphodussweglesi01.jpg
Red phantom tetras (Hyphessobrycon sweglesi)
Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Characiformes
Suborder: Characoidei
Family: Characidae
Latreille, 1825
Subfamilies

Aphyocharacinae
Aphyoditeinae
Bryconinae
Characinae
Cheirodontinae
Gymnocharacinae
Heterocharacinae
Iguanodectinae
Rhoadsiinae
Salmininae
Stethaprioninae
Stevardiinae
Tetragonopterinae
and see text

Characidae, the characids or characins is a family of freshwater subtropical and tropical fish, belonging to the order Characiformes. The name "characins" is the historical one, but scientists today tend to prefer "characids" to reflect their status as a by and large monophyletic group at family rank. To arrive there, this family has undergone much systematic and taxonomic change. Among those fishes that remain in the Characidae for the time being are the tetras, comprising the very similar genera Hemigrammus and Hyphessobrycon, as well as a few related forms such as the cave and neon tetras. Fish of this family are important as food and also include popular aquarium fish species.

These fish vary in length, though many are less than 3 cm (1.2 in). One of the smallest species, Hyphessobrycon roseus, grows to a maximum length of 1.9 cm.

These fish inhabit a wide range and a variety of habitats. They originate in the Americas, ranging from southwestern Texas and Mexico through Central and South America. Many of these fish come from rivers, but, for example, the blind cave tetra even inhabits caves.

Systematics

This family has undergone a large amount of systematic and taxonomic change. More recent revision has moved many former members of the family into their own related but distinct families – the pencilfishes of the genus Nannostomus are a typical example, having now been moved into the Lebiasinidae, the assorted predatory species belonging to Hoplias and Hoplerythrinus have now been moved into the Erythrinidae, and the sabre-toothed fishes of the genus Hydrolycus have been moved into the Cynodontidae. The former subfamily Alestiinae was promoted to family level (Alestiidae) and the subfamilies Crenuchinae and Characidiinae were moved to the family Crenuchidae.

Myleus schomburgkii
The piranhas and relatives (like these disk tetras, Myleus schomburgkii) might be a distinct family.

Other fish families that were formerly classified as members of the Characidae, but which were moved into separate families of their own during recent taxonomic revisions (after 1994) include Acestrorhynchidae, Anostomidae, Chilodontidae, Citharinidae, Ctenoluciidae, Curimatidae, Distichodontidae, Gasteropelecidae, Hemiodontidae, Hepsetidae, Parodontidae, Prochilodontidae, Serrasalmidae, and Triporthidae.

The larger piranhas were originally classified as belonging to the Characidae, but various revisions place them in their own related family, the Serrasalmidae. This reassignment has yet to enjoy universal acceptance, but is gaining in popularity among taxonomists working with these fishes. Given the current state of flux of the Characidae, a number of other changes will doubtless take place, reassigning once-familiar species to other families. Indeed, the entire phylogeny of the Ostariophysi – fishes possessing a Weberian apparatus – has yet to be settled conclusively. Until that phylogeny is settled, the opportunity for yet more upheavals within the taxonomy of the characoid fishes is considerable.

Classification

Phylogeny

Aphyocharax anisitsi
Aphyocharax anisitsi (Aphyocharacinae)
Brycon hilarii
Brycon hilarii (Bryconinae)
Brachychalcinus orbicularis
Brachychalcinus orbicularis (Stethaprioninae)
Hemigrammus hyanuary thomnight 001
Costello tetra
(Hemigrammus hyanuary)
Hyphessobrycon pyrrhonotus thomnight 001
Hyphessobrycon pyrrhonotus
Emperor tetra
Emperor tetra
(Nematobrycon palmeri)
Pygopristis denticulata
Pygopristis denticulata
Phylogeny of Characidae from Melo et al. 2015 with clade names from van der Laan 2017.
Characidae

Spintherobolus clade




Stethaprioninae




Stevardiinae


Characinae


Aphyocharacini




Cheirodontini



Compsurini






Exodontini




Tetragonopterini



Characini









Taxonomy

The subfamilies and tribes currently recognized by most if not all authors, and their respective genera, are:

Subfamily Spintherobolus clade

  • Amazonspinther
  • Spintherobolus

Subfamily Stethaprioninae

  • Tribe Rhoadsiini [Astyanax clade]
    • Astyanacinus
    • Astyanax
    • Carlana
    • Ctenobrycon
    • Inpaichthys
    • Nematobrycon
    • Oligosarcus
    • Parastremma
    • Psellogrammus
    • Rhoadsia
  • Tribe Stygichthyini [Jupiaba clade]
    • Coptobrycon
    • Deuterodon
    • Erythrocharax
    • Jupiaba
    • Macropsobrycon
    • Myxiops
    • Parecbasis
    • Probolodus
    • Stygichthys
  • Tribe Pristellini [Hemigrammus clade; Aphyoditini]
    • Aphyodite
    • Atopomesus
    • Axelrodia
    • Brittanichthys
    • Bryconella
    • Hasemania
    • Hemigrammus
    • Hyphessobrycon
    • Moenkhausia
    • Nematocharax
    • Paracheirodon
    • Parapristella
    • Petitella
    • Phycocharax
    • Pristella
    • Thayeria
  • Tribe Stethaprionini
    • Brachychalcinus
    • Gymnocorymbus
    • Orthospinus
    • Poptella
    • Stethaprion
    • Stichonodon
  • Tribe Gymnocharacini
    • Bario
    • Dectobrycon
    • Ectrepopterus
    • Grundulus
    • Gymnocharacinus
    • Gymnotichthys
    • Hollandichthys
    • Pseudochalceus
    • Rachoviscus
    • Schultzites
  • Tribe Scissorini
    • Genycharax
    • Leptobrycon
    • Microschemobrycon
    • Mixobrycon
    • Oligobrycon
    • Oxybrycon
    • Scissor
    • Serrabrycon
    • Thrissobrycon
    • Tucanoichthys
    • Tyttobrycon

Subfamily Stevardiinae

  • Tribe Eretmobryconini
    • Eretmobrycon
    • Markiana
  • Tribe Xenurobryconini
    • Iotabrycon
    • Ptychocharax
    • Scopaeocharax
    • Tyttocharax
    • Xenurobrycon
  • Tribe Argopleura clade
    • Argopleura
  • Tribe Glandulocaudini
    • Glandulocauda
    • Lophiobrycon
    • Mimagoniates
  • Tribe Stevardiini
    • Chrysobrycon
    • Corynopoma
    • Gephyrocharax
    • Hysteronotus
    • Pseudocorynopoma
    • Pterobrycon
  • Tribe Hemibryconini
    • Acrobrycon
    • Hemibrycon [Boehlkea]
  • Tribe Creagrutini
    • Carlastyanax
    • Creagrutus
  • Tribe Landonini
    • Landonia
  • Tribe Phenacobryconini
    • Phenacobrycon
  • Tribe Trochilocharacini
    • Trochilocharax
  • Tribe Diapomini
    • Attonitus
    • Aulixidens
    • Bryconacidnus
    • Bryconamericus [Hypobrycon]
    • Caiapobrycon
    • Ceratobranchia
    • Cyanogaster
    • Diapoma
    • Knodus
    • Lepidocharax
    • Microgenys
    • Monotocheirodon
    • Othonocheirodus
    • Phallobrycon
    • Piabarchus
    • Piabina
    • Planaltina
    • Rhinobrycon
    • Rhinopetitia

Subfamily Characinae

  • Tribe Protocheirodontini
    • Protocheirodon
  • Tribe Pseudocheirodontini
    • Nanocheirodon
    • Pseudocheirodon
  • Tribe Aphyocharacini
    • Aphyocharacidium
    • Aphyocharax
    • Leptagoniates
    • Paragoniates
    • Phenagoniates
    • Prionobrama
    • Xenagoniates
  • Tribe Cheirodontini
    • Cheirodon
    • Heterocheirodon
    • Prodontocharax
    • Saccoderma
  • Tribe Compsurini
    • Acinocheirodon
    • Compsura
    • Ctenocheirodon
    • Holoshesthes [Aphyocheirodon; Cheirodontops]
    • Kolpotocheirodon
    • Odontostilbe
    • Serrapinnus
  • Tribe Exodontini
    • Bryconexodon
    • Exodon
    • Roeboexodon
  • Tribe Tetragonopterinae
    • Tetragonopterus
  • Tribe Characini
    • Acanthocharax
    • Acestrocephalus
    • Charax
    • Cynopotamus
    • Galeocharax
    • Phenacogaster
    • Priocharax
    • Roeboides

Former members

The Chalceidae, Iguanodectidae, Bryconidae and Heterocharacinae are the most recent clades to be removed in order to maintain a monophyletic Characidae.

Subfamily Iguanodectinae moved to Iguanodectidae

  • Bryconops
  • Iguanodectes
  • Piabucus

Subfamily Heterocharacinae moved to Acestrorhynchidae

  • Gnathocharax
  • Heterocharax
  • Hoplocharax
  • Lonchogenys

Subfamily Bryconinae moved to Bryconidae

  • Brycon
  • Chilobrycon
  • Henochilus

Subfamily Salmininae moved to Bryconidae

  • Salminus

Genera incertae sedis

  • Chalceus moved to Chalceidae

Genera incertae sedis

A large number of taxa in this family are incertae sedis. The relationships of many fish in this family – in particular species traditionally placed in the Tetragonopterinae, which had become something of a "wastebin taxon" – are poorly known, a comprehensive phylogenetic study for the entire family is needed. The genera Hyphessobrycon, Astyanax, Hemigrammus, Moenkhausia, and Bryconamericus include the largest number of currently recognized species among characid fishes that are in need of revision; Astyanax and Hyphessobrycon in the usual delimitation are among the largest genera in this family. These genera were originally proposed between 1854 and 1908 and are still more or less defined as by Carl H. Eigenmann in 1917, though diverse species have been added to each genus since that time. The anatomical diversity within each genus, the fact that each of these generic groups at the present time cannot be well-defined, and the high number of species involved are the major reasons for the lack of phylogenetic analyses dealing with the relationships of the species within these generic "groups".

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