Original description:
- Girard, Charles Frederic. 1856. "Researches upon the cyprinoid fishes inhabiting the fresh waters of the United States, west of the Mississippi Valley, from specimens in the museum of the Smithsonian Institution". Proceedings of the Academy of Natural Sciences of Philadelphia. 8:165-213 (ffm04542)
Type species: Agosia chrysogaster Girard, 1856 (subsequent designation).
Described species included (3):
valid: 1 synonym: 2- Agosia chrysogaster Girard, 1856 (valid)
- Agosia metallica Girard, 1856 (synonym)
- Hyborhynchus siderius Cope, 1875 (synonym)