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Life-forms

Superregnum: Eukaryota
Cladus: Unikonta
Cladus: Opisthokonta
Cladus: Holozoa
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Superphylum: Deuterostomia
Phylum: Chordata
Subphylum: Vertebrata
Infraphylum: Gnathostomata
Megaclassis: Osteichthyes
Superclassis/Classis: Actinopterygii
Classis/Subclassis: Actinopteri
Subclassis/Infraclassis: Neopterygii
Infraclassis: Teleostei
Megacohors: Osteoglossocephalai
Supercohors: Clupeocephala
Cohors: Otomorpha
Subcohors: Ostariophysi
Sectio: Anotophysa

Ordo: Gonorynchiformes
Familia: Kneriidae
Genera: Cromeria - Grasseichthys - Kneria - Parakneria

References

Herder, F. ; J. Huylebrouck & K. Busse, 2011: Catalogue of type specimens of fishes in the Zoologisches Forschungsmuseum Alexander Koenig, Bonn. Bonn Zoological Bulletin 59: 109–136. Full article: [1].

Links

Froese, R. & D. Pauly. Editors. 2006. FishBase, version (02/2006). [2]

Vernacular names
Deutsch: Schlankfische

The Kneriidae are a small family of freshwater gonorhynchiform fishes native to sub-Saharan Africa.

Most species in this family are part of the subfamily Kneriinae; they typically live in fast-flowing streams, often in highlands, and are small fish, no more than 15 cm (5.9 in) in length. The second subfamily Phractolaeminae contains only a single species, which typically inhabits stagnant or slow-moving waters and reaches up to 25 cm (9.8 in) in length. All Kneriidae have an elongated body shape. Some species are sexually dimorphic, with the male possessing a rosette on the gill covers that is absent in the females. Other species are neotenic, retaining larval features into adulthood.[1]
Classification

There are about 31 extant (living) species in five genera.[2] There are two subfamilies, but Phractolaeminae has commonly been regarded as a full family (in which case there is no need for recognizing Kneriinae as it would contain all four remaining genera in Kneriidae).[3][4]

Kneriinae
Cromeria
Grasseichthys
Kneria
Parakneria
Phractolaeminae
Phractolaemus

In addition, the family includes the genus Mahengichthys, which only is known from Eocene fossil remains and is closer to Kneriinae than Phractolaeminae.[4][5]
References

Banister, Keith F. (1998). Paxton, J.R.; Eschmeyer, W. N. (eds.). Encyclopedia of Fishes. San Diego: Academic Press. p. 97. ISBN 0-12-547665-5.
Froese, Rainer; Pauly, Daniel (eds.). "Family Kneriidae". FishBase. July 2021 version.
Eschmeyer, W.N.; Grande, T.; Grande, L. (2010). "A Nomenclatural Analysis of Gonorynchiform Taxa". Gonorynchiformes and Ostariophysan Relationships. pp. 567–587. doi:10.1201/b10194-14. ISBN 978-0-429-06156-1.
Near, T.J.; Dornburg, A.; Friedman, M. (2014). "Phylogenetic relationships and timing of diversification in gonorynchiform fishes inferred using nuclear gene DNA sequences (Teleostei: Ostariophysi)". Molecular Phylogenetics and Evolution. 80: 297–307. Bibcode:2014MolPE..80..297N. doi:10.1016/j.ympev.2014.07.013.
Davis, M.P.; Arratia, G.; Kaiser, T.M. (2013). "The first fossil shellear (Gonorynchiformes: Kneriidae) from the Eocene lake of Mahenge (Tanzania)". Mesozoic Fishes 5 - Global Diversity and Evolution. F. Pfeil. pp. 325–362. ISBN 978-3-89937-159-8.

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