''Casierius'' is an extinct genus of marine

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 ...

that lived during the

Albian The Albian is both an age (geology), age of the geologic timescale and a stage (stratigraphy), stage in the stratigraphic column. It is the youngest or uppermost subdivision of the Early Cretaceous, Early/Lower Cretaceous epoch (geology), Epoch/s ...

stage of the

Early Cretaceous The Early Cretaceous (geochronology, geochronological name) or the Lower Cretaceous (chronostratigraphy, chronostratigraphic name) is the earlier or lower of the two major divisions of the Cretaceous. It is usually considered to stretch from 143.1 ...

epoch. It was a relative of the modern

bonefish The bonefish (''Albula vulpes'') is the type species of the Bonefishes, bonefish family (Albulidae), the only family in order Albuliformes. Taxonomy Bonefish were once believed to be a single species with a global distribution, however 9 differ ...

in the extinct family Phyllodontidae, although some authorities consider it either a true albulid (making it even more closely related to bonefish) or a very early

eel Eels are ray-finned fish belonging to the order Anguilliformes (), which consists of eight suborders, 20 families, 164 genera, and about 1000 species. Eels undergo considerable development from the early larval stage to the eventual adult stage ...

. It contains a single species, ''C. heckeli'', known from the

Glen Rose Formation The Glen Rose Formation is a shallow marine to shoreline geological formation from the lower Cretaceous period exposed over a large area from South Central to North Central Texas. The formation is most widely known for the dinosaur footprints ...

near

Hood County, Texas Hood County is a county in the U.S. state of Texas. As of the 2020 census, the population was 61,598. Its county seat is Granbury. The county is named for John Bell Hood, a Confederate lieutenant general and the commander of Hood's Texas Bri ...

References

Albuliformes Prehistoric ray-finned fish genera Early Cretaceous bony fish Early Cretaceous fish of North America Albian genera Fossils of Texas Fossil taxa described in 1969 {{Cretaceous-fish-stub

See also

References