Range and natural history
Adults occupy upland lakes and streams. Spawning extends from early summer into late July or early August, often in temporary streams. Arrival at those streams is episodic and associated with rain and suitable flow; the reviewed account finds temperature a less important cue than in some related suckers.
Maturing males develop a gold side stripe, small golden marks above the eyes and abundant breeding tubercles. Females remain drabber but also develop tubercles. Both sexes begin reaching maturity at around four years. The source notes disappearance from the original collection localities, a reason to distinguish historical records from current occupancy.
Sources: Catostomus utawana species summary
