Alestidae

Alestidae Temporal range:
Brycinus longipinnis
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Actinopterygii
Order:	Characiformes
Suborder:	Characoidei
Family:	AlestidaeCockerell 1910[1]
Genera
See text

African tetras (familyAlestidae, formerly spelled Alestiidae) are a group of characiformfish found exclusively in Africa.^[2] This family contains about 18 genera and 119 species. Among the best known members are the Congo tetra and African tigerfish; both are kept in aquaria, and tigerfish are utilized for food and as gamefish.

Although currently native only to African waterways, fossil evidence suggests that during the Paleogene, they ranged as far north as southern Europe and as far east as the Arabian subcontinent.^[3] Fossil remains date back to potentially the Late Paleocene with Hydrocynus remains known from Algeria.^[4] Alestid-like teeth are also known from the Late Cretaceous (Maastrichtian) of France, and phylogenetic evidence also suggests that they diverged around this time.^[5][6]

Taxonomy

Congo tetra (Phenacogrammus interruptus)

Hydrocynus goliath, the largest species in the family

Taxonomy based on Van der Laan 2017^[7] and Eschmeyer's Catalog of Fishes (2025):^[8]

• Family AlestidaeCockerell, 1910
  • Genus AlestesMüller & Troschel, 1844
  • Genus AlestionRoberts, 2019
  • Genus AlestopetersiusHoedeman, 1951
  • Genus BathyaethiopsFowler, 1949
  • Genus BrachyalestesGünther, 1864
  • Genus BrachypetersiusHoedeman, 1956
  • Genus BrycinusValenciennes, 1850
  • Genus BryconaethiopsGünther, 1873
  • Genus BryconalestesHoedeman, 1951
  • Genus ClupeocharaxPellégrin, 1926
  • Genus Hemigrammopetersius
  • Genus HydrocynusCuvier, 1816
  • Genus LadigesiaGéry, 1968
  • Genus MicralestesBoulenger, 1899
  • Genus NannopetersiusHoedeman, 1951
  • Genus PetersiusHilgendorf, 1894
  • Genus PhenacogrammusEigenmann, 1907
  • Genus RhabdalestesHoedeman, 1951
  • Genus TricuspidalestesPoll, 1967

The following fossil genera are also known:

• Genus †AlestoidesMonod & Gaudant, 1998 (Early Eocene of France)^[9]
• Genus †ArabocharaxMicklich & Roscher, 1990 (Oligocene of Saudi Arabia)^[3]
• Genus †BunocharaxVan Neer, 1994 (Miocene of Africa)
• Genus †EurocharaxGaudant, 1980 (?Oligocene of France)^[9]
• Genus ?†MahengecharaxMurray, 2003 (Middle Eocene of Tanzania, taxonomic identity disputed)^[3][9]
• Genus †SindacharaxGreenwood & Howes, 1975 (Miocene of Africa)

The Lepidarchidae, whose two genera were previously placed in this family, have been found to be an ancient group more closely related to the Hepsetidae, and are thus placed in their own family now.^[6]

Maximum likelihood phylogenetic tree based on a 2023 analysis of ultraconserved element loci:^[10]

	Hepsetus odoe
	Brycinus grandisquamis Brycinus macrolepidotus Micralestes acutidens Rhabdalestes rhodesiensis Alestes inferus Hydrocynus goliath Brachyalestes spp. Bryconalestes longipinnis Bathyaethiops caudomaculatus Phenacogrammus interruptus Nannopetersius ansorgii Alestopetersius leopoldianus

References

1. Richard van der Laan; William N. Eschmeyer & Ronald Fricke (2014). "Family-group names of recent fishes". Zootaxa. 3882 (2): 1–230. doi:10.11646/zootaxa.3882.1.1. PMID 25543675.
2. Nelson, Joseph S. (2006). Fishes of the World. John Wiley & Sons, Inc. ISBN 0-471-25031-7
3. Murray, Alison M (2003). "A new characiform fish (Teleostei: Ostariophysi) from the Eocene of Tanzania". Canadian Journal of Earth Sciences. 40 (4): 473–481. doi:10.1139/e02-108. ISSN 0008-4077.
4. Hammouda, Sid-Ahmed; Murray, Alison M.; Divay, Julien D.; Mebrouk, Fateh; Adaci, Mohammed; Bensalah, Mustapha (2016). "Earliest occurrence of Hydrocynus (Characiformes, Alestidae) from Eocene continental deposits of Méridja Hamada, northwestern Sahara, Algeria". Canadian Journal of Earth Sciences. 53 (10): 1042–1052. doi:10.1139/cjes-2016-0006. ISSN 0008-4077.
5. Otero, O.; Valentin, X.; Garcia, G. (2008). "Cretaceous characiform fishes (Teleostei: Ostariophysi) from Northern Tethys: description of new material from the Maastrichtian of Provence (Southern France) and palaeobiogeographical implications". Geological Society, London, Special Publications. 295 (1): 155–164. doi:10.1144/SP295.10. ISSN 0305-8719.
6. Melo, Bruno F; Stiassny, Melanie L J (2024-01-01). "Phylogenomic and anatomical evidence for the Late Cretaceous diversification of African characiform fishes, including a new family, under the influence of the Trans-Saharan Seaway". Evolutionary Journal of the Linnean Society. 3 (1) kzae030. doi:10.1093/evolinnean/kzae030. ISSN 2752-938X.
7. van der Laan, Richard (December 2017). Freshwater fish list(PDF) (23rd ed.). p. 997. ISSN 2468-9157.
8. Fricke, Ron; Eschmeyer, William N. & van der Laan, Richard (eds.). "Genera in the family Alestidae". Catalog of Fishes. California Academy of Sciences. Retrieved 17 May 2025.
9. ZANATA, ANGELA M.; VARI, RICHARD P. (2005-09-01). "The family Alestidae (Ostariophysi, Characiformes): a phylogenetic analysis of a trans-Atlantic clade". Zoological Journal of the Linnean Society. 145 (1): 1–144. doi:10.1111/j.1096-3642.2005.00183.x. ISSN 0024-4082.
10. "Phylogenomics and Morphology of the African Fish Genus Brycinus with Revalidation of Brachyalestes and Description of a New Species from the Congo Basin (Teleostei: Alestidae)". Ichthyology & Herpetology. 111 (4). November 2023. doi:10.1643/i2023033.