''Acrognathus'' (from el, άκρος , 'high' and el, γνάθος 'jaw') is an

extinct Extinction is the termination of a kind of organism or of a group of kinds (taxon), usually a species. The moment of extinction is generally considered to be the death of the last individual of the species, although the capacity to breed and ...

genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus com ...

of prehistoric

bony fish Osteichthyes (), popularly referred to as the bony fish, is a diverse superclass of fish that have skeletons primarily composed of bone tissue. They can be contrasted with the Chondrichthyes, which have skeletons primarily composed of cartilag ...

belonging to the order

Aulopiformes Aulopiformes is a diverse order of marine ray-finned fish consisting of some 15 extant and several prehistoric families with about 45 genera and over 230 species. The common names grinners, lizardfishes and allies, or aulopiforms are someti ...

. Although no extensive systematic analysis has been performed, it is tentatively placed with the greeneyes in the family

Chlorophthalmidae Greeneyes are deep-sea aulopiform marine fishes in the small family Chlorophthalmidae. Thought to have a circumglobal distribution in tropical and temperate waters, the family contains just 18 species in two genera. The family name Chlorophthalm ...

, making it the oldest representative of that family. The following species are known: * ''A. boops'' Agassiz, 1836 (late Cenomanian/

Coniacian The Coniacian is an age or stage in the geologic timescale. It is a subdivision of the Late Cretaceous Epoch or Upper Cretaceous Series and spans the time between 89.8 ± 1 Ma and 86.3 ± 0.7 Ma (million years ago). The Coniacian is preceded by t ...

to Turonian of the United Kingdom) * ''A. dodgei'' Hay, 1903 (late Cenomanian of Lebanon) * ''A. libanicus'' Woodward, 1901 (late Cenomanian of Lebanon)

References

Prehistoric ray-finned fish genera Prehistoric aulopiformes Late Cretaceous fish of Asia Cretaceous fish of Europe Chlorophthalmidae Cenomanian genus first appearances Turonian genus extinctions Late Cretaceous bony fish Taxa named by Louis Agassiz {{paleo-rayfinned-fish-stub Fossils of England Fossils of Lebanon Fossil taxa described in 1836

See also

References