Scissorini

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 . 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.Nelson (2006) 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.

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 Triportheidae.Oliveira, C., Avelino, G.S., Abe, K.T., Mariguela, T.C., Benine, R.C., Orti, G., Vari, R.P., & Correa e Castro, R.M. (2011)
Phylogenetic relationships within the speciose family Characidae (Teleostei: Ostariophysi: Characiformes) based on multilocus analysis and extensive ingroup sampling.
''BMC Evolutionary Biology, 11: 275. doi: 10.1186/1471-2148-11-275''

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

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''Netto-Ferreira, A.L., Birindelli, J.L.O., de Sousa, L.M., Mariguela, T.C. & Oliveira, C. (2013)
A New Miniature Characid (Ostariophysi: Characiformes: Characidae), with Phylogenetic Position Inferred from Morphological and Molecular Data.
''PLoS ONE, 8 (1): e52098. doi:10.1371/journal.pone.0052098''
** ''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''Ohara, W.M., Mirande, J.M. & Lima, F.C.T.d. (2017)
''Phycocharax rasbora'', a new genus and species of Brazilian tetra (Characiformes: Characidae) from Serra do Cachimbo, rio Tapajós basin.
''PLoS ONE, 12 (2): e0170648.''
** '' 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''">Boehlkea.html" ;"title="'Boehlkea">'Boehlkea''* Tribe Creagrutini">Boehlkea">'Boehlkea<_a>''.html" ;"title="Boehlkea.html" ;"title="'Boehlkea">'Boehlkea''">Boehlkea.html" ;"title="'Boehlkea">'Boehlkea''* Tribe Creagrutini
** ''Carlastyanax''
** ''Creagrutus''
* Tribe Landonini
** ''Landonia''
* Tribe Phenacobryconini
** ''Phenacobrycon''
* Tribe Trochilocharacini
** ''Trochilocharax''
* Tribe Diapomini
** ''Attonitus''
** ''Aulixidens''
** '' Bryconacidnus''
** ''Bryconamericus'' 'Hypobrycon''">Hypobrycon.html" ;"title="'Hypobrycon">'Hypobrycon''** ''Caiapobrycon''
** ''Ceratobranchia''
** ''Cyanogaster''Mattox, G.M.T., Britz, R., Toledo-Piza, M. & Marinho, M.M.F. (2013): Cyanogaster noctivaga, a remarkable new genus and species of miniature fish from the Rio Negro, Amazon basin (Ostariophysi: Characidae). ''Ichthyological Exploration of Freshwaters, 23 (4): 297-318.''
** '' Diapoma''
** ''Knodus''
** ''Lepidocharax''
** '' Microgenys''
** '' Monotocheirodon''
** '' Othonocheirodus''
** '' Phallobrycon''
** ''Piabarchus''
** '' Piabina''
** '' Planaltina''
** ''Rhinobrycon''
** '' Rhinopetitia''

Subfamily Characinae

* Tribe Protocheirodontini
** '' Protocheirodon''Vari, R.P., Melo, B.F. & Oliveira, C. (2016): ''Protocheirodon'', a new genus of Characidae (Teleostei: Characiformes) with the redescription of the poorly known ''Protocheirodon pi''. ''Neotropical Ichthyology, 14 (2): e150154.''
* Tribe Pseudocheirodontini
** ''Nanocheirodon''
** '' Pseudocheirodon''
* Tribe Aphyocharacini
** '' Aphyocharacidium''
** '' Aphyocharax''
** '' Leptagoniates''
** '' Paragoniates''
** '' Phenagoniates''
** '' Prionobrama''
** '' Xenagoniates''
* Tribe Cheirodontini
** '' Cheirodon''
** '' Heterocheirodon''
** '' Prodontocharax''
** ''Saccoderma''
* Tribe Compsurini
** '' Acinocheirodon''
** '' Compsura''
** '' Ctenocheirodon''Malabarba, L.R. & Jerep, F.C. (2012): A New Genus and Species of Cheirodontine Fish from South America (Teleostei: Characidae). ''Copeia, 2012 (2): 243-250.''
** '' Holoshesthes'' 'Aphyocheirodon''; ''Cheirodontops">Aphyocheirodon.html" ;"title="'Aphyocheirodon">'Aphyocheirodon''; ''Cheirodontops'']
** ''Kolpotocheirodon''
** ''Odontostilbe''
** ''Serrapinnus''
* Tribe Exodontini
** ''Bryconexodon''
** ''Bucktooth tetra, Exodon''
** ''Roeboexodon''
* Tribe [ etragonopterinae
** '' 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 etragonopterinae, which had become something of a "etragonopterinae, 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;de Lucena (2003) ''Astyanax'' and ''Hyphessobrycon'' in the usual delimitation are among the largest genus">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".

References

*

* de Lucena, Carlos Alberto Santos (2003): New characid fish, ''Hyphessobrycon scutulatus'', from the rio Teles Pires drainage, upper rio Tapajós system (Ostariophysi: Characiformes: Characidae). ''Neotropical Ichthyology'' 1(2): 93-96
PDF fulltext
* Géry, Jacques (1977): ''Characoids of the World''.
* Nelson, Joseph S. (2006): ''Fishes of the World''. John Wiley & Sons, Inc.

{{Taxonbar, from=Q625352

Extant Miocene first appearances
Ray-finned fish families