| Casierius Temporal range: | |
|---|---|
| Scientific classification | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Actinopterygii |
| Order: | Albuliformes |
| Family: | † Phyllodontidae |
| Genus: | † Casierius Estes, 1969 |
| Species: | †C. heckeli |
| Binomial name | |
| †Casierius heckeli Estes, 1969 | |
Casierius is an extinct genus of marine ray-finned fish that lived during the Albian stage of the Early Cretaceous epoch. [1] It was a relative of the modern bonefish 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. [2] [3] [4] [5] It contains a single species, C. heckeli, known from the Glen Rose Formation near Hood County, Texas. [6]