Tylognathus is an invalid genus

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...

 of ray-finned fishes in the 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...

 Cyprinidae. It was established by Heckel in 1843 without a type species

Type species

In biological nomenclature, a type species is both a concept and a practical system which is used in the classification and nomenclature of animals and plants. The value of a "type species" lies in the fact that it makes clear what is meant by a particular genus name. A type species is the species...

. As type species, Varicorhinus diplostomus was designated by Bleeker in 1863; this had been described by Heckel in 1838, and was erroneously described again by the same author in 1844 as T. valenciennesii. This species is nowadays placed in the genus Bangana

Bangana

Bangana is a genus of Asian cyprinid fish. This genus contains 23 species ranging from quite small to large. Some of these species are important food fish.-Species:* Bangana almorae * Bangana ariza...

.

The alleged members of this polyphyletic assemblage mainly belong to the disputed subfamily Labeoninae

Labeoninae

Labeoninae is a doubtfully distinct subfamily of ray-finned fishes in the family Cyprinidae of order Cypriniformes. They inhabit freshwater and are most abundant in the region around southern China. They are a generally very apomorphic group, perhaps the most "advanced" of the Cyprinidae...

 (considered the tribe

Tribe (biology)

In biology, a tribe is a taxonomic rank between family and genus. It is sometimes subdivided into subtribes.Some examples include the tribes: Canini, Acalypheae, Hominini, Bombini, and Antidesmeae.-See also:* Biological classification* Rank...

 Labeonini of subfamily Cyprininae by other authors), but some are less closely related cyprinids. The 34 taxa formerly placed in Tylognathus, with their currently valid names, were:

• Tylognathus ariza (Hamilton, 1807) is now Labeo ariza
  Labeo ariza
  Bangana ariza, the Reba, is a cyprinid fish found in India, Nepal, Bangladesh and Pakistan....
  
  
• Tylognathus barbatulus Heckel, 1844 is now Crossocheilus diplochilus
• Tylognathus bo Popta, 1904 is now Lobocheilos bo
• Tylognathus boides Popta, 1906 is now Lobocheilos bo
• Tylognathus brunneus Fowler, 1934 is now Henicorhynchus siamensis
• Tylognathus cantini Sauvage, 1882 is now Labeo cylindricus
• Tylognathus caudimaculatus Fowler, 1934 is now Cirrhinus caudimaculatus
  Cirrhinus caudimaculatus
  Cirrhinus caudimaculatus is a species of ray-finned fish in the genus Cirrhinus....
  
  
• Tylognathus coatesi Fowler, 1937 is now Crossocheilus reticulatus
• Tylognathus davidi Sauvage, 1878 is now Sarcocheilichthys davidi
• Tylognathus davisi Fowler, 1937 is now Lobocheilos davisi
• Tylognathus delacouri Pellegrin & Fang, 1940 is now Lobocheilos delacouri
• Tylognathus elegans Günther, 1868 is now Hemigrammocapoeta elegans
  Hemigrammocapoeta elegans
  Hemigrammocapoeta elegans is a species of ray-finned fish in the Cyprinidae....
  
  
• Tylognathus falcifer (Valenciennes, 1842) is now Lobocheilos falcifer
• Tylognathus fowleri Pellegrin & Chevey, 1936 is now Lobocheilos fowleri
• Tylognathus gedrosicus (Zugmayer, 1912) is now Labeo gedrosicus
  Labeo gedrosicus
  Bangana gedrosicus is a species of cyprinid fish endemic to Pakistan where it is only found in the Mashkel River drainage in Baluchistan....
  
  
• Tylognathus gracilis Fowler, 1937 is now Lobocheilos gracilis
• Tylognathus heterorhynchus (Bleeker, 1853) is now Schismatorhynchos heterorhynchos
• Tylognathus hispidus (Valenciennes, 1842) is now Lobocheilos falcifer
• Tylognathus kajanensis Popta, 1904 is now Lobocheilos kajanensis
• Tylognathus klatti is now Crossocheilus klatti, Hemigrammocapoeta klatti, or included in H. kemali
  Hemigrammocapoeta kemali
  Hemigrammocapoeta kemali is a species of ray-finned fish in the Cyprinidae family.It is found only in Turkey.Its natural habitats are swamps and freshwater lakes.It is threatened by habitat loss.-Source:...
  
  
• Tylognathus lehat (Bleeker, 1858) is now Lobocheilos lehat
• Tylognathus melanotaenia Fowler, 1935 is now Lobocheilos melanotaenia
• Tylognathus montanus Günther, 1889 is now Labeo cylindricus
• Tylognathus nanus is now Hemigrammocapoeta nana
  Hemigrammocapoeta nana
  Hemigrammocapoeta nana is a ray-finned fish species in the family Cyprinidae. It is found in Israel, Jordan, and Syria.Its natural habitats are freshwater rivers, lakes and ponds of the Barada and Jordan River drainage basins, as well as the Kishon River. This bottom-dwelling fish is often...
  
  
• Tylognathus porcellus Heckel, 1844 is now Labeo porcellus
  Labeo porcellus
  Labeo porcellus is fish in genus Labeo....
  
  
• Tylognathus quadrilineatus Fowler, 1935 is now Lobocheilos quadrilineatus
• Tylognathus rhabdoura Fowler, 1934 is now Lobocheilos rhabdoura
• Tylognathus schwanenfeldii (Bleeker, 1853) is now Lobocheilos schwanenfeldii
• Tylognathus siamensis de Beaufort, 1927 is now Henicorhynchus siamensis
• Tylognathus sinensis Kner, 1867 is now Abbottina rivularis
• Tylognathus steinitziorum is now Hemigrammocapoeta nana
• Tylognathus striolatus Günther, 1868 is now Labeo boggut
• Tylognathus trangensis Fowler, 1939 is now Lobocheilos trangensis
• Tylognathus valenciennesii Heckel, 1844 is now Bangana diplostoma