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<br /> <br /> <br /> <br />Fig. 19. Interneurals of Catostomus ardens. Top- <br />postflexion mesolarva, 16.8 mm SL, 19.2 mm TL. <br />Middle - juvenile, 21.4 mm SL, 26.2 mm TL. Bottom <br />- juvenile, 39.5 mm SL, 45.6 mm TL. <br /> <br /> <br /> <br />Fig. 20. Frontoparietal fontanelle of Catostomus ardens. <br />Top - juvenile, 2'1.4 mm SL, 26.2 mm TL. Bottom - <br />juvenile, 39.5 mm SL, 45.4 mm TL. <br /> <br />Table 5. Dimensions of frontoparietal fontanelle for <br />Catostomus ardens larvae >16 mIll SL, early juveniles, <br />and yearling. <br /> <br />Specimens <br />mm SL n <br /> <br />Width as % <br />oflength <br /> <br />45-60 <br />43 <br />38-39 <br />42-43 <br />43 <br /> <br />Max. width <br />(mm) <br /> <br />1.0-1.2 <br />0.9 <br />0.9-0.9 <br />1.0-1.0 <br />1.2 <br /> <br />Max. length <br />(mm) <br /> <br />2.0-2.2 <br />2.0 <br />2.3-2.4 <br />2.3-2.4 <br />2.8 <br /> <br />17-19 2 <br />20-21 I <br />22-25 2 <br />26- 34 3 <br />35-46 1 <br />76-81 0 <br /> <br />35 <br />