FAMILY CYPRINIDAE 155 



space between the bands are usually silvery, but in spring males they 

 are a bright scarlet. The dorsal fin has 8 rays. The scales are 16-85-10. 

 The teeth are 5 — 5 or 5 — 4. The mouth is slightly oblique and curved 

 and is more than one-fourth the length of the head. 



The southern redbelly dace ranges from Iowa through southern Wis- 

 consin to Pennsylvania and southward to Alabama and Oklahoma. It 

 is a southern species. Its distribution in Minnesota is not well known. 

 The Minnesota Department of Conservation collected it from the 

 Root River in 1945. Cox (1897) reported it as having been taken at 

 Austin by Dr. Meek. Several specimens have been found in a minnow 

 dealer's stock, but their origin was unknown. Greene (1935) reported 

 it from many streams in southern Wisconsin and from several streams 

 not far from Lake Pepin. 



NORTHERN REDBELLY DACE 



Chrosomus eos Cope 



This minnow (Figure 25A) is similar to the southern redbelly dace 

 except that the jaws and snout are shorter. The mouth is strongly 

 oblique and curved, reaching less than one-fourth the length of the 

 head. The teeth are 5 — 5 or 5 — 4. In Michigan it was reported by 

 Hubbs and Cooper (1936) as favoring acid waters, such as bog pools 

 and streams. They report that this minnow spawns in filamentous 

 algae. During spawning the female is attended by several males. 



The northern redbelly dace ranges across southern Canada from 

 Winnipeg eastward and southward to Colorado, Nebraska, and Minne- 

 sota, and into New Jersey. In Minnesota this species occurs occasionally 

 in many of the smaller nonacid tributaries of the Mississippi, especially 

 above Minneapolis. It is found in many of the smaller tributaries of the 

 Minnesota. St. Croix, and Rum rivers. Greene (1935) found it well 

 distributed over Wisconsin and along the Mississippi below Lake Pepin. 



GENUS Clinostomus (Girard) 



REDSIDE DACE 



Clinostomus elongatus (Kirtland) 



The redside dace is a medium-sized minnow with a broad, black 

 lateral band, the front half of which is bright crimson in spring males. 

 The head is long and pointed and the mouth proportionately larger 

 than that of any other minnow. There are less than 80 scales in the 

 lateral line. The teeth are typically 5 — 4 but may be 5 — 5 or 4 — 5 or 4 — 4. 



Hubbs and Lagler (1941) reported the redside dace to be rather dis- 

 continuous in range. In general it ranges from Minnesota and Iowa 

 eastward through southern Ontario and into New York, and does not 

 range far southward. It is found in some of the small streams in the 



