GILBERT: FISHES OF THE SUBGENUS LUXILUS


 LIFE HISTORY AND ECOLOGY. N. zonatus is typically an inhabitant
of small to medium-sized Ozarkian streams with a gravel or rubble
bottom and clear, rapidly-flowing water. In these situations it often
is the most abundant fish species present. Hubbs and Moore (1940)
reported this species, as well as N. pilsbryi, to be most common in
moderately swift pools, but my observations indicate it is equally at
home in or near the base of swift riffles, where it often is associated
with N. ariommus telescopus. This habitat is somewhat different
from that preferred by either N. chrysocephalus or N. cornutus, both
of which characteristically live slightly farther away from the bases
of riffles and rarely occur on the riffles except during spawning time.
This apparent preference of zonatus for swifter water is reflected in
its more streamlined form, as contrasted to the deeper, more com-
pressed appearance of chrysocephalus and cornutus.
 N. zonatus commonly lives with N. chrysocephalus chrysocephalus,
but has been found only once with N. cornutus. At no time have
N. zonatus and N. pilsbryi been found together, though the two occur
within a few miles of each other in a number of places.
 No accounts of either spawning or food habits in N. zonatus have
been published. Its breeding habits are presumably similar to those
of the closely related N. pilsbryi in the Illinois River system of Okla-
homa, which Moore and Paden (1950: 92) have reported on.

 Notropis pilsbryi Fowler

 Duskystripe Shiner, figures 5B, 6, map 2.





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Figure 6. Adult male Notropis Ili'.l.ii,. USNM 161632, 74.5 mm SL, from
Spring Creek, Cherokee County, Oklahoma.

Notropis zonatus, Jordan, 1885b: 814 misidentificationn in part; description; range).
 Hydrophlox zonatus, Jordan, 1929: 83 misidentificationn in part; description;
 Ozark region).
 Coccotis zonatus, Driver, 1942: 276 misidentificationn in part; key).


1964