Distichodontidae is a family

Family (biology)

In biological classification, family is* a taxonomic rank. Other well-known ranks are life, domain, kingdom, phylum, class, order, genus, and species, with family fitting between order and genus. As for the other well-known ranks, there is the option of an immediately lower rank, indicated by the...

 of fresh water

Fresh Water

Fresh Water is the debut album by Australian rock and blues singer Alison McCallum, released in 1972. Rare for an Australian artist at the time, it came in a gatefold sleeve...

 Africa

Africa

Africa is the world's second largest and second most populous continent, after Asia. At about 30.2 million km² including adjacent islands, it covers 6% of the Earth's total surface area and 20.4% of the total land area...

n fish

Fish

Fish are a paraphyletic group of organisms that consist of all gill-bearing aquatic vertebrate animals that lack limbs with digits. Included in this definition are the living hagfish, lampreys, and cartilaginous and bony fish, as well as various extinct related groups...

 of the order

Order (biology)

In scientific classification used in biology, the order is# a taxonomic rank used in the classification of organisms. Other well-known ranks are life, domain, kingdom, phylum, class, family, genus, and species, with order fitting in between class and family...

 Characiformes

Characiformes

The Characiformes are an order of ray-finned fish, comprising the characins and their allies. Grouped in 18 recognized families, there are a few thousand different species, including the well-known piranha and tetras.-Taxonomy:...

.

There are two evolutionary grades in this family; micropredators (predators of very small organisms) and herbivore

Herbivore

Herbivores are organisms that are anatomically and physiologically adapted to eat plant-based foods. Herbivory is a form of consumption in which an organism principally eats autotrophs such as plants, algae and photosynthesizing bacteria. More generally, organisms that feed on autotrophs in...

s have a non-protractile upper jaw and a deep to shallow body, while carnivore

Carnivore

A carnivore meaning 'meat eater' is an organism that derives its energy and nutrient requirements from a diet consisting mainly or exclusively of animal tissue, whether through predation or scavenging...

s have a movable upper jaw and have an elongate body. The fish vary greatly in size between species, with the micropredators being less than 8 centimetres (3.1 in) in length, and the largest carnivores can reach up to 83 centimetres (32.7 in).

Genera

There are seventeen genera

Genus

In biology, a genus is a low-level taxonomic rank used in the biological classification of living and fossil organisms, which is an example of definition by genus and differentia...

 including about 90 species

Species

In biology, a species is one of the basic units of biological classification and a taxonomic rank. A species is often defined as a group of organisms capable of interbreeding and producing fertile offspring. While in many cases this definition is adequate, more precise or differing measures are...

:

Family Distichodontidae

• Genus Belonophago (2 species)
• Genus Congocharax (3 species)
• Genus Distichodus
  Distichodus
  Distichodus is a genus of fish in the Distichodontidae family. It comprises 23 species....
  
  (23 species)
• Genus Dundocharax (1 species)
• Genus Eugnathichthys (2 species)
• Genus Hemigrammocharax (9 species)
• Genus Hemistichodus (3 species)
• Genus Ichthyborus (4 species)
• Genus Mesoborus (1 species)
• Genus Microstomatichthyoborus (2 species)
• Genus Nannaethiops (2 species)
• Genus Nannocharax (26 species)
• Genus Neolebias (10 species)
• Genus Paradistichodus (1 species)
• Genus Paraphago (1 species)
• Genus Phago (3 species)
• Genus Xenocharax (1 species)