Descrizione originale:
- 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).
Elenco delle specie descritte (3):
valid: 1 synonym: 2- Agosia chrysogaster Girard, 1856 (valid)
- Agosia metallica Girard, 1856 (synonym)
- Hyborhynchus siderius Cope, 1875 (synonym)