Hyphessobrycon
| Hyphessobrycon | |
|---|---|
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| Hyphessobrycon bentosi | |
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| Hyphessobrycon eques | |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Actinopterygii |
| Order: | Characiformes |
| Family: | Characidae |
| Subfamily: | incertae sedis |
| Genus: |
Hyphessobrycon Durbin, 1908 |
| Type species | |
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Hemigrammus compressus Meek, 1904 |
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| Synonyms | |
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Dermatocheir Durbin, 1909 |
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Dermatocheir Durbin, 1909
Megalamphodus Eigenmann, 1915
Pseudopristella Géry, 1960
Hyphessobrycon is a genus of freshwater fish in the family Characidae of order Characiformes. These species are among the fishes known as tetras. The genus is distributed in the Neotropic ecozone from southern Mexico to Río de la Plata in Argentina. Many of these species are native to South America; about half a dozen species are from Central America and a single species, H. compressus is from southern Mexico.
All small fishes, the Hyphessobrycon tetras reach maximum overall lengths of about 2–7.5 cm (0.8–3.0 in). There is great anatomical diversity in this genus. They are generally of typical characin shape, but vary greatly in coloration and body form, many species having distinctive black, red or yellow markings on their bodies and fins. These species are generally omnivorous, feeding predominantly on small crustaceans, insects, annelid worms and zooplankton. When spawning, they scatter their eggs and guard neither eggs nor young.
This large genus of characins includes over 140 species. The systematics of Hyphessobrycon are still largely unresolved. Six groups within this genus have been recognized based on color patterns alone. With no phylogenetic analysis of this genus, species are placed into this genus as anatomically defined by Carl H. Eigenmann in 1917. By this definition, Hyphessobrycon is identified by the presence of an adipose fin, incomplete lateral line, two tooth series in the premaxilla, with the teeth of the external series continuous in a single series, teeth not strictly conical, preventral scales arranged in more than one row and lack of scales in the caudal fin. The characteristic of extension of scales onto the caudal fin that differentiates this genus from Hemigrammus is not satisfactory as it occurs in intermediate conditions.
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