The Minnows
Fishes with the margin of the upper jaw formed by the pre-maxillaries alone, and the lower pharyngeal bones well developed, falciform, nearly parallel with the gillarches, each with 1 to 3 series of teeth in small number, usually 4 or 5 in the main row, and fewer in the other rows if present; head naked, body scaly, except in a few genera; barbels usually not present, but 2 or 4 small ones present in some genera; belly usually rounded, rarely compressed, never serrated; gill-openings moderate, the membranes broadly joined to the isthmus; gills 4, a slit behind the last; no adipose fin; dorsal fin short in all our species; ventrals abdominal; air-bladder usually large and commonly divided into 2 parts; stomach without appendages, appearing as a simple enlargement of the intestine.
Squawfish Ptychocheilus oregonensis Richardson
White Salmon of the Colorado River Ptychocheilus lucius Girard
Utah Lake Chub Leuciscus lineatus (Girard)- Hornyhead Hybopsis kentuckiensis (Rafinesque)
- Cone-head Minnow Mylopharodon conocephalus (Baird & Girard)
- Columbia Chub Mylocheilus caurinus (Richardson)
- Fallfish Semotilus corporalis (Mitchill)
Common Chub Semotilus atromaculatus (Mitchill)