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Montana Animal Field Guide

Montana Field Guides

Plains Minnow - Hybognathus placitus

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Potential Species of Concern

Global Rank: G4
State Rank: S4

Agency Status
USFWS:
USFS:
BLM:
FWP Conservation Tier: 3


 

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General Description
The plains minnow is similar to the western silvery minnow in many features. It is native, silvery in color, found in the same major drainages and even at the same sites as the western silvery minnow, eats similar foods and attains about the same size. The plains minnow is so similar to the western silvery minnow that the two can only be told apart after making a dissection and examining a certain bone in the head.

Diagnostic Characteristics
Overall, the plains minnow is very silvery; the back is dusky or yellowish-olive, and the underside is white. The plains minnow has 15 to 22 scales across the belly from lateral line to lateral line.

General Distribution
Montana Range

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Western Hemisphere Range

 


Summary of Observations Submitted for Montana
Number of Observations: 48

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Relative Density

Recency

 

(Records associated with a range of dates are excluded from time charts)



Habitat
Habitat for the plains minnow is probably similar to that for the western silvery minnow. Seventy percent of specimens in a southeast Montana study were taken in the mouths of streams, showing their preference for larger streams.

Food Habits
Food habits are probably very similar to the western silvery minnow.

Ecology
The ecology of the plains minnow is very similar to H. argyritis. They are distinguishable by the pharyngeal process of the basioccipital.

Reproductive Characteristics
Reproductive biology is probably very similar to the western silvery minnow.

References
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Citation for data on this website:
Plains Minnow — Hybognathus placitus.  Montana Field Guide.  Montana Natural Heritage Program and Montana Fish, Wildlife and Parks.  Retrieved on September 30, 2014, from http://FieldGuide.mt.gov/speciesDetail.aspx?elcode=AFCJB16050
 
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