''Acrognathus'' (from , 'high' and 'jaw') is an

extinct Extinction is the termination of an organism by the death of its Endling, last member. A taxon may become Functional extinction, functionally extinct before the death of its last member if it loses the capacity to Reproduction, reproduce and ...

genus Genus (; : genera ) is a taxonomic rank above species and below family (taxonomy), family as used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In bino ...

ray-finned fish Actinopterygii (; ), members of which are known as ray-finned fish or actinopterygians, is a class of bony fish that comprise over 50% of living vertebrate species. They are so called because of their lightly built fins made of webbings of sk ...

belonging to the order

Aulopiformes Aulopiformes is a diverse order (biology), order of Marine (ocean), marine ray-finned fish consisting of some 15 Extant taxon, extant and several prehistoric family (biology), families with about 45 genera and over 230 species. The common names ...

. 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 Chlorophthal ...

, 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 ...

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

References

† A dagger, obelisk, or obelus is a typographical mark that usually indicates a footnote if an asterisk has already been used. The symbol is also used to indicate death (of people) or extinction (of species or languages). It is one of the mo ...

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